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Formation of the $\eta_c$ in Two-Photon Collisions at LEP

The two-photon width $\Gamma_{\gamma\gamma}$ of the $\eta_{\mathrm{c}}$ meson has been measured with the L3 detector at LEP. The $\eta_{\mathrm{c}}$ is studied in the decay modes $\pi^+\pi^-\pi^+\pi^-$, $\pi^+\pi^-$K$^+$K$^-$, K$_s^0$K$^\pm\pi^\mp$, K$^+$K$^-\pi^{0}$, $\pi^+\pi^-\eta$, $\pi^+\pi^-\e...

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Detalles Bibliográficos
Autores principales:	Acciarri, M., Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.G., Ambrosi, G., Anderhub, H., Andreev, Valery P., Angelescu, T., Anselmo, F., Arefev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Balandras, A., Ball, R.C., Banerjee, S., Banerjee, Sw., Barczyk, A., Barillere, R., Barone, L., Bartalini, P., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Berdugo, J., Berges, P., Bertucci, B., Betev, B.L., Bhattacharya, S., Biasini, M., Biland, A., Blaising, J.J., Blyth, S.C., Bobbink, G.J., Bohm, A., Boldizsar, L., Borgia, B., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J.G., Brigljevic, V., Brochu, F., Buffini, A., Buijs, A., Burger, J.D., Burger, W.J., Busenitz, J., Button, A., Cai, X.D., Campanelli, Mario, Capell, M., Cara Romeo, G., Carlino, G., Cartacci, A.M., Casaus, J., Castellini, G., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo, M., Chang, Y.H., Chaturvedi, U.K., Chemarin, M., Chen, A., Chen, G., Chen, G.M., Chen, H.F., Chen, H.S., Chereau, X., Chiefari, G., Cifarelli, L., Cindolo, F., Civinini, C., Clare, I., Clare, R., Coignet, G., Colijn, A.P., Colino, N., Costantini, S., Cotorobai, F., Cozzoni, B., de la Cruz, B., Csilling, A., Cucciarelli, S., Dai, T.S., van Dalen, J.A., D'Alessandro, R., de Asmundis, R., Deglon, P., Degre, A., Deiters, K., Della Volpe, D., Denes, P., de Notaristefani, F., De Salvo, A., Diemoz, M., van Dierendonck, D., Di Lodovico, F., Dionisi, C., Dittmar, M., Dominguez, A., Doria, A., Dova, M.T., Duchesneau, D., Dufournand, D., Duinker, P., Duran, I., El Mamouni, H., Engler, A., Eppling, F.J., Erne, F.C., Extermann, P., Fabre, M., Faccini, R., Falagan, M.A., Falciano, S., Favara, A., Fay, J., Fedin, O., Felcini, M., Ferguson, T., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J.H., Filthaut, F., Fisher, P.H., Fisk, I., Forconi, G., Fredj, L., Freudenreich, K., Furetta, C., Galaktionov, Iouri, Ganguli, S.N., Garcia-Abia, Pablo, Gataullin, M., Gau, S.S., Gentile, S., Gheordanescu, N., Giagu, S., Gong, Z.F., Grenier, Gerald Jean, Grimm, O., Grunewald, M.W., van Gulik, R., Gupta, V.K., Gurtu, A., Gutay, L.J., Haas, D., Hasan, A., Hatzifotiadou, D., Hebbeker, T., Herve, Alain, Hidas, P., Hirschfelder, J., Hofer, H., Holzner, G., Hoorani, H., Hou, S.R., Iashvili, I., Jin, B.N., Jones, Lawrence W., de Jong, P., Josa-Mutuberria, I., Khan, R.A., Kamrad, D., Kaur, M., Kienzle-Focacci, M.N., Kim, D., Kim, D.H., Kim, J.K., Kim, S.C., Kirkby, Jasper, Kiss, D., Kittel, W., Klimentov, A., Konig, A.C., Kopp, A., Korolko, I., Koutsenko, V., Kraber, M., Kraemer, R.W., Krenz, W., Kunin, A., Lacentre, P., Ladron de Guevara, P., Laktineh, I., Landi, G., Lassila-Perini, K., Laurikainen, P., Lavorato, A., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Le Coultre, P., Lee, H.J., Le Goff, J.M., Leiste, R., Leonardi, Emanuele, Levtchenko, P., Li, C., Lin, C.H., Lin, W.T., Linde, F.L., Lista, L., Liu, Z.A., Lohmann, W., Longo, E., Lu, Y.S., Lubelsmeyer, K., Luci, C., Luckey, David, Lugnier, L., Luminari, L., Lustermann, W., Ma, W.G., Maity, M., Malgeri, L., Malinin, A., Mana, C., Mangeol, D., Marchesini, P., Marian, G., Martin, J.P., Marzano, F., Massaro, G.G.G., Mazumdar, K., McNeil, R.R., Mele, S., Merola, L., Meschini, M., Metzger, W.J., von der Mey, M., Migani, D., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G.B., Molnar, P., Monteleoni, B., Moulik, T., Muanza, G.S., Muheim, F., Muijs, A.J.M., Napolitano, M., Nessi-Tedaldi, F., Newman, H., Niessen, T., Nisati, A., Kluge, Hannelies, Oh, Y.D., Organtini, G., Ostonen, R., Palomares, C., Pandoulas, D., Paoletti, S., Paolucci, P., Park, H.K., Park, I.H., Pascale, G., Passaleva, G., Patricelli, S., Paul, Thomas Cantzon, Pauluzzi, M., Paus, C., Pauss, F., Peach, D., Pedace, M., Pei, Y.J., Pensotti, S., Perret-Gallix, D., Petersen, B., Piccolo, D., Pieri, M., Piroue, P.A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Postema, H., Pothier, J., Produit, N., Prokofev, D.O., Prokofev, D., Quartieri, J., Rahal-Callot, G., Rahaman, M.A., Raja, N., Ramelli, R., Rancoita, P.G., Raven, G., Razis, P., Ren, D., Rescigno, M., Reucroft, S., van Rhee, T., Riemann, S., Riles, Keith, Robohm, A., Rodin, J., Roe, B.P., Romero, L., Rosca, A., Rosier-Lees, S., Rubio, J.A., Ruschmeier, D., Rykaczewski, H., Sarkar, S., Salicio, J., Sanchez, E., Sanders, M.P., Sarakinos, M.E., Schafer, C., Schegelsky, V., Schmidt-Kaerst, S., Schmitz, D., Schopper, H., Schotanus, D.J., Schwenke, J., Schwering, G., Sciacca, C., Sciarrino, D., Seganti, A., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shumilov, E., Shvorob, A., Siedenburg, T., Son, D., Smith, B., Spillantini, P., Steuer, M., Stickland, D.P., Stone, A., Stone, H., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L.Z., Suter, H., Swain, J.D., Szillasi, Z., Tang, X.W., Tauscher, L., Taylor, L., Timmermans, Charles, Ting, S.C.C., Ting, S.M., Tonwar, S.C., Toth, J., Tully, C., Tung, K.L., Uchida, Y., Ulbricht, J., Valente, E., Vesztergombi, G., Vetlitsky, I., Vicinanza, D., Viertel, G., Villa, S., Vivargent, M., Vlachos, S., Vodopianov, I., Vogel, H., Vogt, H., Vorobev, I., Vorobov, A.A., Vorvolakos, A., Wadhwa, M., Wallraff, W., Wang, M., Wang, X.L., Wang, Z.M., Weber, A., Weber, M., Wienemann, P., Wilkens, H., Wu, S.X., Wynhoff, S., Xia, L., Xu, Z.Z., Yang, B.Z., Yang, C.G., Yang, H.J., Yang, M., Ye, J.B., Yeh, S.C., You, J.M., Zalite, A., Zalite, Yu., Zhang, Z.P., Zhu, G.Y., Zhu, R.Y., Zichichi, A., Ziegler, F., Zilizi, G., Zoller, M.
Lenguaje:	eng
Publicado:	1999
Materias:	Particle Physics - Experiment
Acceso en línea:	https://dx.doi.org/10.1016/S0370-2693(99)00784-4 http://cds.cern.ch/record/389018

_version_	1780893659378483200
author	Acciarri, M. Achard, P. Adriani, O. Aguilar-Benitez, M. Alcaraz, J. Alemanni, G. Allaby, J. Aloisio, A. Alviggi, M.G. Ambrosi, G. Anderhub, H. Andreev, Valery P. Angelescu, T. Anselmo, F. Arefev, A. Azemoon, T. Aziz, T. Bagnaia, P. Baksay, L. Balandras, A. Ball, R.C. Banerjee, S. Banerjee, Sw. Barczyk, A. Barillere, R. Barone, L. Bartalini, P. Basile, M. Battiston, R. Bay, A. Becattini, F. Becker, U. Behner, F. Berdugo, J. Berges, P. Bertucci, B. Betev, B.L. Bhattacharya, S. Biasini, M. Biland, A. Blaising, J.J. Blyth, S.C. Bobbink, G.J. Bohm, A. Boldizsar, L. Borgia, B. Bourilkov, D. Bourquin, M. Braccini, S. Branson, J.G. Brigljevic, V. Brochu, F. Buffini, A. Buijs, A. Burger, J.D. Burger, W.J. Busenitz, J. Button, A. Cai, X.D. Campanelli, Mario Capell, M. Cara Romeo, G. Carlino, G. Cartacci, A.M. Casaus, J. Castellini, G. Cavallari, F. Cavallo, N. Cecchi, C. Cerrada, M. Cesaroni, F. Chamizo, M. Chang, Y.H. Chaturvedi, U.K. Chemarin, M. Chen, A. Chen, G. Chen, G.M. Chen, H.F. Chen, H.S. Chereau, X. Chiefari, G. Cifarelli, L. Cindolo, F. Civinini, C. Clare, I. Clare, R. Coignet, G. Colijn, A.P. Colino, N. Costantini, S. Cotorobai, F. Cozzoni, B. de la Cruz, B. Csilling, A. Cucciarelli, S. Dai, T.S. van Dalen, J.A. D'Alessandro, R. de Asmundis, R. Deglon, P. Degre, A. Deiters, K. Della Volpe, D. Denes, P. de Notaristefani, F. De Salvo, A. Diemoz, M. van Dierendonck, D. Di Lodovico, F. Dionisi, C. Dittmar, M. Dominguez, A. Doria, A. Dova, M.T. Duchesneau, D. Dufournand, D. Duinker, P. Duran, I. El Mamouni, H. Engler, A. Eppling, F.J. Erne, F.C. Extermann, P. Fabre, M. Faccini, R. Falagan, M.A. Falciano, S. Favara, A. Fay, J. Fedin, O. Felcini, M. Ferguson, T. Ferroni, F. Fesefeldt, H. Fiandrini, E. Field, J.H. Filthaut, F. Fisher, P.H. Fisk, I. Forconi, G. Fredj, L. Freudenreich, K. Furetta, C. Galaktionov, Iouri Ganguli, S.N. Garcia-Abia, Pablo Gataullin, M. Gau, S.S. Gentile, S. Gheordanescu, N. Giagu, S. Gong, Z.F. Grenier, Gerald Jean Grimm, O. Grunewald, M.W. van Gulik, R. Gupta, V.K. Gurtu, A. Gutay, L.J. Haas, D. Hasan, A. Hatzifotiadou, D. Hebbeker, T. Herve, Alain Hidas, P. Hirschfelder, J. Hofer, H. Holzner, G. Hoorani, H. Hou, S.R. Iashvili, I. Jin, B.N. Jones, Lawrence W. de Jong, P. Josa-Mutuberria, I. Khan, R.A. Kamrad, D. Kaur, M. Kienzle-Focacci, M.N. Kim, D. Kim, D.H. Kim, J.K. Kim, S.C. Kirkby, Jasper Kiss, D. Kittel, W. Klimentov, A. Konig, A.C. Kopp, A. Korolko, I. Koutsenko, V. Kraber, M. Kraemer, R.W. Krenz, W. Kunin, A. Lacentre, P. Ladron de Guevara, P. Laktineh, I. Landi, G. Lassila-Perini, K. Laurikainen, P. Lavorato, A. Lebeau, M. Lebedev, A. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, P. Lee, H.J. Le Goff, J.M. Leiste, R. Leonardi, Emanuele Levtchenko, P. Li, C. Lin, C.H. Lin, W.T. Linde, F.L. Lista, L. Liu, Z.A. Lohmann, W. Longo, E. Lu, Y.S. Lubelsmeyer, K. Luci, C. Luckey, David Lugnier, L. Luminari, L. Lustermann, W. Ma, W.G. Maity, M. Malgeri, L. Malinin, A. Mana, C. Mangeol, D. Marchesini, P. Marian, G. Martin, J.P. Marzano, F. Massaro, G.G.G. Mazumdar, K. McNeil, R.R. Mele, S. Merola, L. Meschini, M. Metzger, W.J. von der Mey, M. Migani, D. Mihul, A. Milcent, H. Mirabelli, G. Mnich, J. Mohanty, G.B. Molnar, P. Monteleoni, B. Moulik, T. Muanza, G.S. Muheim, F. Muijs, A.J.M. Napolitano, M. Nessi-Tedaldi, F. Newman, H. Niessen, T. Nisati, A. Kluge, Hannelies Oh, Y.D. Organtini, G. Ostonen, R. Palomares, C. Pandoulas, D. Paoletti, S. Paolucci, P. Park, H.K. Park, I.H. Pascale, G. Passaleva, G. Patricelli, S. Paul, Thomas Cantzon Pauluzzi, M. Paus, C. Pauss, F. Peach, D. Pedace, M. Pei, Y.J. Pensotti, S. Perret-Gallix, D. Petersen, B. Piccolo, D. Pieri, M. Piroue, P.A. Pistolesi, E. Plyaskin, V. Pohl, M. Pojidaev, V. Postema, H. Pothier, J. Produit, N. Prokofev, D.O. Prokofev, D. Quartieri, J. Rahal-Callot, G. Rahaman, M.A. Raja, N. Ramelli, R. Rancoita, P.G. Raven, G. Razis, P. Ren, D. Rescigno, M. Reucroft, S. van Rhee, T. Riemann, S. Riles, Keith Robohm, A. Rodin, J. Roe, B.P. Romero, L. Rosca, A. Rosier-Lees, S. Rubio, J.A. Ruschmeier, D. Rykaczewski, H. Sarkar, S. Salicio, J. Sanchez, E. Sanders, M.P. Sarakinos, M.E. Schafer, C. Schegelsky, V. Schmidt-Kaerst, S. Schmitz, D. Schopper, H. Schotanus, D.J. Schwenke, J. Schwering, G. Sciacca, C. Sciarrino, D. Seganti, A. Servoli, L. Shevchenko, S. Shivarov, N. Shoutko, V. Shumilov, E. Shvorob, A. Siedenburg, T. Son, D. Smith, B. Spillantini, P. Steuer, M. Stickland, D.P. Stone, A. Stone, H. Stoyanov, B. Straessner, A. Sudhakar, K. Sultanov, G. Sun, L.Z. Suter, H. Swain, J.D. Szillasi, Z. Tang, X.W. Tauscher, L. Taylor, L. Timmermans, Charles Ting, S.C.C. Ting, S.M. Tonwar, S.C. Toth, J. Tully, C. Tung, K.L. Uchida, Y. Ulbricht, J. Valente, E. Vesztergombi, G. Vetlitsky, I. Vicinanza, D. Viertel, G. Villa, S. Vivargent, M. Vlachos, S. Vodopianov, I. Vogel, H. Vogt, H. Vorobev, I. Vorobov, A.A. Vorvolakos, A. Wadhwa, M. Wallraff, W. Wang, M. Wang, X.L. Wang, Z.M. Weber, A. Weber, M. Wienemann, P. Wilkens, H. Wu, S.X. Wynhoff, S. Xia, L. Xu, Z.Z. Yang, B.Z. Yang, C.G. Yang, H.J. Yang, M. Ye, J.B. Yeh, S.C. You, J.M. Zalite, A. Zalite, Yu. Zhang, Z.P. Zhu, G.Y. Zhu, R.Y. Zichichi, A. Ziegler, F. Zilizi, G. Zoller, M.
author_facet	Acciarri, M. Achard, P. Adriani, O. Aguilar-Benitez, M. Alcaraz, J. Alemanni, G. Allaby, J. Aloisio, A. Alviggi, M.G. Ambrosi, G. Anderhub, H. Andreev, Valery P. Angelescu, T. Anselmo, F. Arefev, A. Azemoon, T. Aziz, T. Bagnaia, P. Baksay, L. Balandras, A. Ball, R.C. Banerjee, S. Banerjee, Sw. Barczyk, A. Barillere, R. Barone, L. Bartalini, P. Basile, M. Battiston, R. Bay, A. Becattini, F. Becker, U. Behner, F. Berdugo, J. Berges, P. Bertucci, B. Betev, B.L. Bhattacharya, S. Biasini, M. Biland, A. Blaising, J.J. Blyth, S.C. Bobbink, G.J. Bohm, A. Boldizsar, L. Borgia, B. Bourilkov, D. Bourquin, M. Braccini, S. Branson, J.G. Brigljevic, V. Brochu, F. Buffini, A. Buijs, A. Burger, J.D. Burger, W.J. Busenitz, J. Button, A. Cai, X.D. Campanelli, Mario Capell, M. Cara Romeo, G. Carlino, G. Cartacci, A.M. Casaus, J. Castellini, G. Cavallari, F. Cavallo, N. Cecchi, C. Cerrada, M. Cesaroni, F. Chamizo, M. Chang, Y.H. Chaturvedi, U.K. Chemarin, M. Chen, A. Chen, G. Chen, G.M. Chen, H.F. Chen, H.S. Chereau, X. Chiefari, G. Cifarelli, L. Cindolo, F. Civinini, C. Clare, I. Clare, R. Coignet, G. Colijn, A.P. Colino, N. Costantini, S. Cotorobai, F. Cozzoni, B. de la Cruz, B. Csilling, A. Cucciarelli, S. Dai, T.S. van Dalen, J.A. D'Alessandro, R. de Asmundis, R. Deglon, P. Degre, A. Deiters, K. Della Volpe, D. Denes, P. de Notaristefani, F. De Salvo, A. Diemoz, M. van Dierendonck, D. Di Lodovico, F. Dionisi, C. Dittmar, M. Dominguez, A. Doria, A. Dova, M.T. Duchesneau, D. Dufournand, D. Duinker, P. Duran, I. El Mamouni, H. Engler, A. Eppling, F.J. Erne, F.C. Extermann, P. Fabre, M. Faccini, R. Falagan, M.A. Falciano, S. Favara, A. Fay, J. Fedin, O. Felcini, M. Ferguson, T. Ferroni, F. Fesefeldt, H. Fiandrini, E. Field, J.H. Filthaut, F. Fisher, P.H. Fisk, I. Forconi, G. Fredj, L. Freudenreich, K. Furetta, C. Galaktionov, Iouri Ganguli, S.N. Garcia-Abia, Pablo Gataullin, M. Gau, S.S. Gentile, S. Gheordanescu, N. Giagu, S. Gong, Z.F. Grenier, Gerald Jean Grimm, O. Grunewald, M.W. van Gulik, R. Gupta, V.K. Gurtu, A. Gutay, L.J. Haas, D. Hasan, A. Hatzifotiadou, D. Hebbeker, T. Herve, Alain Hidas, P. Hirschfelder, J. Hofer, H. Holzner, G. Hoorani, H. Hou, S.R. Iashvili, I. Jin, B.N. Jones, Lawrence W. de Jong, P. Josa-Mutuberria, I. Khan, R.A. Kamrad, D. Kaur, M. Kienzle-Focacci, M.N. Kim, D. Kim, D.H. Kim, J.K. Kim, S.C. Kirkby, Jasper Kiss, D. Kittel, W. Klimentov, A. Konig, A.C. Kopp, A. Korolko, I. Koutsenko, V. Kraber, M. Kraemer, R.W. Krenz, W. Kunin, A. Lacentre, P. Ladron de Guevara, P. Laktineh, I. Landi, G. Lassila-Perini, K. Laurikainen, P. Lavorato, A. Lebeau, M. Lebedev, A. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, P. Lee, H.J. Le Goff, J.M. Leiste, R. Leonardi, Emanuele Levtchenko, P. Li, C. Lin, C.H. Lin, W.T. Linde, F.L. Lista, L. Liu, Z.A. Lohmann, W. Longo, E. Lu, Y.S. Lubelsmeyer, K. Luci, C. Luckey, David Lugnier, L. Luminari, L. Lustermann, W. Ma, W.G. Maity, M. Malgeri, L. Malinin, A. Mana, C. Mangeol, D. Marchesini, P. Marian, G. Martin, J.P. Marzano, F. Massaro, G.G.G. Mazumdar, K. McNeil, R.R. Mele, S. Merola, L. Meschini, M. Metzger, W.J. von der Mey, M. Migani, D. Mihul, A. Milcent, H. Mirabelli, G. Mnich, J. Mohanty, G.B. Molnar, P. Monteleoni, B. Moulik, T. Muanza, G.S. Muheim, F. Muijs, A.J.M. Napolitano, M. Nessi-Tedaldi, F. Newman, H. Niessen, T. Nisati, A. Kluge, Hannelies Oh, Y.D. Organtini, G. Ostonen, R. Palomares, C. Pandoulas, D. Paoletti, S. Paolucci, P. Park, H.K. Park, I.H. Pascale, G. Passaleva, G. Patricelli, S. Paul, Thomas Cantzon Pauluzzi, M. Paus, C. Pauss, F. Peach, D. Pedace, M. Pei, Y.J. Pensotti, S. Perret-Gallix, D. Petersen, B. Piccolo, D. Pieri, M. Piroue, P.A. Pistolesi, E. Plyaskin, V. Pohl, M. Pojidaev, V. Postema, H. Pothier, J. Produit, N. Prokofev, D.O. Prokofev, D. Quartieri, J. Rahal-Callot, G. Rahaman, M.A. Raja, N. Ramelli, R. Rancoita, P.G. Raven, G. Razis, P. Ren, D. Rescigno, M. Reucroft, S. van Rhee, T. Riemann, S. Riles, Keith Robohm, A. Rodin, J. Roe, B.P. Romero, L. Rosca, A. Rosier-Lees, S. Rubio, J.A. Ruschmeier, D. Rykaczewski, H. Sarkar, S. Salicio, J. Sanchez, E. Sanders, M.P. Sarakinos, M.E. Schafer, C. Schegelsky, V. Schmidt-Kaerst, S. Schmitz, D. Schopper, H. Schotanus, D.J. Schwenke, J. Schwering, G. Sciacca, C. Sciarrino, D. Seganti, A. Servoli, L. Shevchenko, S. Shivarov, N. Shoutko, V. Shumilov, E. Shvorob, A. Siedenburg, T. Son, D. Smith, B. Spillantini, P. Steuer, M. Stickland, D.P. Stone, A. Stone, H. Stoyanov, B. Straessner, A. Sudhakar, K. Sultanov, G. Sun, L.Z. Suter, H. Swain, J.D. Szillasi, Z. Tang, X.W. Tauscher, L. Taylor, L. Timmermans, Charles Ting, S.C.C. Ting, S.M. Tonwar, S.C. Toth, J. Tully, C. Tung, K.L. Uchida, Y. Ulbricht, J. Valente, E. Vesztergombi, G. Vetlitsky, I. Vicinanza, D. Viertel, G. Villa, S. Vivargent, M. Vlachos, S. Vodopianov, I. Vogel, H. Vogt, H. Vorobev, I. Vorobov, A.A. Vorvolakos, A. Wadhwa, M. Wallraff, W. Wang, M. Wang, X.L. Wang, Z.M. Weber, A. Weber, M. Wienemann, P. Wilkens, H. Wu, S.X. Wynhoff, S. Xia, L. Xu, Z.Z. Yang, B.Z. Yang, C.G. Yang, H.J. Yang, M. Ye, J.B. Yeh, S.C. You, J.M. Zalite, A. Zalite, Yu. Zhang, Z.P. Zhu, G.Y. Zhu, R.Y. Zichichi, A. Ziegler, F. Zilizi, G. Zoller, M.
author_sort	Acciarri, M.
collection	CERN
description	The two-photon width $\Gamma_{\gamma\gamma}$ of the $\eta_{\mathrm{c}}$ meson has been measured with the L3 detector at LEP. The $\eta_{\mathrm{c}}$ is studied in the decay modes $\pi^+\pi^-\pi^+\pi^-$, $\pi^+\pi^-$K$^+$K$^-$, K$_s^0$K$^\pm\pi^\mp$, K$^+$K$^-\pi^{0}$, $\pi^+\pi^-\eta$, $\pi^+\pi^-\eta'$, and $\rho^+\rho^-$ using an integrated luminosity of 140 pb$^{-1}$ at $\sqrt{s} \simeq 91$ GeV and of 52 pb$^{-1}$ at $\sqrt{s} \simeq 183$ GeV. The result is $\Gamma_{\gamma\gamma}(\eta_{\mathrm{c}}) = 6.9 \pm 1.7 \mbox{(stat.)} \pm 0.8 \mbox{(sys.)} \pm 2.0$(BR) keV. The $Q^2$ dependence of the $\eta_{\mathrm{c}}$ cross section is studied for $Q^2 < 9$ GeV$^{2}$. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a $\rho$-pole. In addition, a signal of $29 \pm 11$ events is observed at the $\chi_{\mathrm{c}0}$ mass. Upper limits for the two-photon widths of the $\chi_{\mathrm{c}0}$, $\chi_{\mathrm{c}2}$, and $\eta_{\mathrm{c}}'$ are also given.
id	cern-389018
institution	Organización Europea para la Investigación Nuclear
language	eng
publishDate	1999
record_format	invenio
spelling	cern-3890182022-01-28T09:10:35Zdoi:10.1016/S0370-2693(99)00784-4http://cds.cern.ch/record/389018engAcciarri, M.Achard, P.Adriani, O.Aguilar-Benitez, M.Alcaraz, J.Alemanni, G.Allaby, J.Aloisio, A.Alviggi, M.G.Ambrosi, G.Anderhub, H.Andreev, Valery P.Angelescu, T.Anselmo, F.Arefev, A.Azemoon, T.Aziz, T.Bagnaia, P.Baksay, L.Balandras, A.Ball, R.C.Banerjee, S.Banerjee, Sw.Barczyk, A.Barillere, R.Barone, L.Bartalini, P.Basile, M.Battiston, R.Bay, A.Becattini, F.Becker, U.Behner, F.Berdugo, J.Berges, P.Bertucci, B.Betev, B.L.Bhattacharya, S.Biasini, M.Biland, A.Blaising, J.J.Blyth, S.C.Bobbink, G.J.Bohm, A.Boldizsar, L.Borgia, B.Bourilkov, D.Bourquin, M.Braccini, S.Branson, J.G.Brigljevic, V.Brochu, F.Buffini, A.Buijs, A.Burger, J.D.Burger, W.J.Busenitz, J.Button, A.Cai, X.D.Campanelli, MarioCapell, M.Cara Romeo, G.Carlino, G.Cartacci, A.M.Casaus, J.Castellini, G.Cavallari, F.Cavallo, N.Cecchi, C.Cerrada, M.Cesaroni, F.Chamizo, M.Chang, Y.H.Chaturvedi, U.K.Chemarin, M.Chen, A.Chen, G.Chen, G.M.Chen, H.F.Chen, H.S.Chereau, X.Chiefari, G.Cifarelli, L.Cindolo, F.Civinini, C.Clare, I.Clare, R.Coignet, G.Colijn, A.P.Colino, N.Costantini, S.Cotorobai, F.Cozzoni, B.de la Cruz, B.Csilling, A.Cucciarelli, S.Dai, T.S.van Dalen, J.A.D'Alessandro, R.de Asmundis, R.Deglon, P.Degre, A.Deiters, K.Della Volpe, D.Denes, P.de Notaristefani, F.De Salvo, A.Diemoz, M.van Dierendonck, D.Di Lodovico, F.Dionisi, C.Dittmar, M.Dominguez, A.Doria, A.Dova, M.T.Duchesneau, D.Dufournand, D.Duinker, P.Duran, I.El Mamouni, H.Engler, A.Eppling, F.J.Erne, F.C.Extermann, P.Fabre, M.Faccini, R.Falagan, M.A.Falciano, S.Favara, A.Fay, J.Fedin, O.Felcini, M.Ferguson, T.Ferroni, F.Fesefeldt, H.Fiandrini, E.Field, J.H.Filthaut, F.Fisher, P.H.Fisk, I.Forconi, G.Fredj, L.Freudenreich, K.Furetta, C.Galaktionov, IouriGanguli, S.N.Garcia-Abia, PabloGataullin, M.Gau, S.S.Gentile, S.Gheordanescu, N.Giagu, S.Gong, Z.F.Grenier, Gerald JeanGrimm, O.Grunewald, M.W.van Gulik, R.Gupta, V.K.Gurtu, A.Gutay, L.J.Haas, D.Hasan, A.Hatzifotiadou, D.Hebbeker, T.Herve, AlainHidas, P.Hirschfelder, J.Hofer, H.Holzner, G.Hoorani, H.Hou, S.R.Iashvili, I.Jin, B.N.Jones, Lawrence W.de Jong, P.Josa-Mutuberria, I.Khan, R.A.Kamrad, D.Kaur, M.Kienzle-Focacci, M.N.Kim, D.Kim, D.H.Kim, J.K.Kim, S.C.Kirkby, JasperKiss, D.Kittel, W.Klimentov, A.Konig, A.C.Kopp, A.Korolko, I.Koutsenko, V.Kraber, M.Kraemer, R.W.Krenz, W.Kunin, A.Lacentre, P.Ladron de Guevara, P.Laktineh, I.Landi, G.Lassila-Perini, K.Laurikainen, P.Lavorato, A.Lebeau, M.Lebedev, A.Lebrun, P.Lecomte, P.Lecoq, P.Le Coultre, P.Lee, H.J.Le Goff, J.M.Leiste, R.Leonardi, EmanueleLevtchenko, P.Li, C.Lin, C.H.Lin, W.T.Linde, F.L.Lista, L.Liu, Z.A.Lohmann, W.Longo, E.Lu, Y.S.Lubelsmeyer, K.Luci, C.Luckey, DavidLugnier, L.Luminari, L.Lustermann, W.Ma, W.G.Maity, M.Malgeri, L.Malinin, A.Mana, C.Mangeol, D.Marchesini, P.Marian, G.Martin, J.P.Marzano, F.Massaro, G.G.G.Mazumdar, K.McNeil, R.R.Mele, S.Merola, L.Meschini, M.Metzger, W.J.von der Mey, M.Migani, D.Mihul, A.Milcent, H.Mirabelli, G.Mnich, J.Mohanty, G.B.Molnar, P.Monteleoni, B.Moulik, T.Muanza, G.S.Muheim, F.Muijs, A.J.M.Napolitano, M.Nessi-Tedaldi, F.Newman, H.Niessen, T.Nisati, A.Kluge, HanneliesOh, Y.D.Organtini, G.Ostonen, R.Palomares, C.Pandoulas, D.Paoletti, S.Paolucci, P.Park, H.K.Park, I.H.Pascale, G.Passaleva, G.Patricelli, S.Paul, Thomas CantzonPauluzzi, M.Paus, C.Pauss, F.Peach, D.Pedace, M.Pei, Y.J.Pensotti, S.Perret-Gallix, D.Petersen, B.Piccolo, D.Pieri, M.Piroue, P.A.Pistolesi, E.Plyaskin, V.Pohl, M.Pojidaev, V.Postema, H.Pothier, J.Produit, N.Prokofev, D.O.Prokofev, D.Quartieri, J.Rahal-Callot, G.Rahaman, M.A.Raja, N.Ramelli, R.Rancoita, P.G.Raven, G.Razis, P.Ren, D.Rescigno, M.Reucroft, S.van Rhee, T.Riemann, S.Riles, KeithRobohm, A.Rodin, J.Roe, B.P.Romero, L.Rosca, A.Rosier-Lees, S.Rubio, J.A.Ruschmeier, D.Rykaczewski, H.Sarkar, S.Salicio, J.Sanchez, E.Sanders, M.P.Sarakinos, M.E.Schafer, C.Schegelsky, V.Schmidt-Kaerst, S.Schmitz, D.Schopper, H.Schotanus, D.J.Schwenke, J.Schwering, G.Sciacca, C.Sciarrino, D.Seganti, A.Servoli, L.Shevchenko, S.Shivarov, N.Shoutko, V.Shumilov, E.Shvorob, A.Siedenburg, T.Son, D.Smith, B.Spillantini, P.Steuer, M.Stickland, D.P.Stone, A.Stone, H.Stoyanov, B.Straessner, A.Sudhakar, K.Sultanov, G.Sun, L.Z.Suter, H.Swain, J.D.Szillasi, Z.Tang, X.W.Tauscher, L.Taylor, L.Timmermans, CharlesTing, S.C.C.Ting, S.M.Tonwar, S.C.Toth, J.Tully, C.Tung, K.L.Uchida, Y.Ulbricht, J.Valente, E.Vesztergombi, G.Vetlitsky, I.Vicinanza, D.Viertel, G.Villa, S.Vivargent, M.Vlachos, S.Vodopianov, I.Vogel, H.Vogt, H.Vorobev, I.Vorobov, A.A.Vorvolakos, A.Wadhwa, M.Wallraff, W.Wang, M.Wang, X.L.Wang, Z.M.Weber, A.Weber, M.Wienemann, P.Wilkens, H.Wu, S.X.Wynhoff, S.Xia, L.Xu, Z.Z.Yang, B.Z.Yang, C.G.Yang, H.J.Yang, M.Ye, J.B.Yeh, S.C.You, J.M.Zalite, A.Zalite, Yu.Zhang, Z.P.Zhu, G.Y.Zhu, R.Y.Zichichi, A.Ziegler, F.Zilizi, G.Zoller, M.Formation of the $\eta_c$ in Two-Photon Collisions at LEPParticle Physics - ExperimentThe two-photon width $\Gamma_{\gamma\gamma}$ of the $\eta_{\mathrm{c}}$ meson has been measured with the L3 detector at LEP. The $\eta_{\mathrm{c}}$ is studied in the decay modes $\pi^+\pi^-\pi^+\pi^-$, $\pi^+\pi^-$K$^+$K$^-$, K$_s^0$K$^\pm\pi^\mp$, K$^+$K$^-\pi^{0}$, $\pi^+\pi^-\eta$, $\pi^+\pi^-\eta'$, and $\rho^+\rho^-$ using an integrated luminosity of 140 pb$^{-1}$ at $\sqrt{s} \simeq 91$ GeV and of 52 pb$^{-1}$ at $\sqrt{s} \simeq 183$ GeV. The result is $\Gamma_{\gamma\gamma}(\eta_{\mathrm{c}}) = 6.9 \pm 1.7 \mbox{(stat.)} \pm 0.8 \mbox{(sys.)} \pm 2.0$(BR) keV. The $Q^2$ dependence of the $\eta_{\mathrm{c}}$ cross section is studied for $Q^2 < 9$ GeV$^{2}$. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a $\rho$-pole. In addition, a signal of $29 \pm 11$ events is observed at the $\chi_{\mathrm{c}0}$ mass. Upper limits for the two-photon widths of the $\chi_{\mathrm{c}0}$, $\chi_{\mathrm{c}2}$, and $\eta_{\mathrm{c}}'$ are also given.The two-photon width Γ γγ of the η c meson has been measured with the L3 detector at LEP. The η c is studied in the decay modes π + π − π + π − , π + π − K + K − , K 0 s K ± π ∓ , K + K − π 0 , π + π − η , π + π − η ′, and ρ + ρ − using an integrated luminosity of 140 pb −1 at s ≃91 GeV and of 52 pb −1 at s ≃183 GeV. The result is Γ γγ (η c )=6.9±1.7 stat ±0.8 sys ±2.0 (BR) keV. The Q 2 dependence of the η c cross section is studied for Q 2 <9 GeV 2 . It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a ρ -pole. In addition, a signal of 29±11 events is observed at the χ c0 mass. Upper limits for the two-photon widths of the χ c0 , χ c2 , and η c ′ are also given.The two-photon width $\Gamma_{\gamma\gamma}$ of the $\eta_c$ meson has been measured with the L3 detector at LEP. The $\eta_c$ is studied in the decay modes $\pi^+\pi^-\pi^+\pi^-$, $\pi^+\pi^-$K$^+$K$^-$, K$_s^0$K$^\pm\pi^\mp$, K$^+$K$^-\pi^{0}$, $\pi^+\pi^-\eta$, $\pi^+\pi^-\eta'$, and $\rho^+\rho^-$ using an integrated luminosity of 140 pb$^{-1}$ at $\sqrt{s} \simeq 91$ GeV and of 52 pb$^{-1}$ at $\sqrt{s} \simeq 183$ GeV. The result is $\Gamma_{\gamma\gamma}(\eta_c) = 6.9 \pm 1.7 (stat.) \pm 0.8 (sys.) \pm 2.0$(BR) keV. The $Q^2$ dependence of the $\eta_c$ cross section is studied for $Q^2 < 9$ GeV$^{2}$. It is found to be better described by a Vector Meson Dominance model form factor with a J-pole than with a $\rho$-pole. In addition, a signal of $29 \pm 11$ events is observed at the $\chi_c0$ mass. Upper limits for the two-photon widths of the $\chi_c0$, $\chi_c2$, and $\eta_c'$ are also given.hep-ex/9909008CERN-EP-99-072CERN-EP-99-72CERN-EP-99-072CERN-L3-176oai:cds.cern.ch:3890181999-05-21
spellingShingle	Particle Physics - Experiment Acciarri, M. Achard, P. Adriani, O. Aguilar-Benitez, M. Alcaraz, J. Alemanni, G. Allaby, J. Aloisio, A. Alviggi, M.G. Ambrosi, G. Anderhub, H. Andreev, Valery P. Angelescu, T. Anselmo, F. Arefev, A. Azemoon, T. Aziz, T. Bagnaia, P. Baksay, L. Balandras, A. Ball, R.C. Banerjee, S. Banerjee, Sw. Barczyk, A. Barillere, R. Barone, L. Bartalini, P. Basile, M. Battiston, R. Bay, A. Becattini, F. Becker, U. Behner, F. Berdugo, J. Berges, P. Bertucci, B. Betev, B.L. Bhattacharya, S. Biasini, M. Biland, A. Blaising, J.J. Blyth, S.C. Bobbink, G.J. Bohm, A. Boldizsar, L. Borgia, B. Bourilkov, D. Bourquin, M. Braccini, S. Branson, J.G. Brigljevic, V. Brochu, F. Buffini, A. Buijs, A. Burger, J.D. Burger, W.J. Busenitz, J. Button, A. Cai, X.D. Campanelli, Mario Capell, M. Cara Romeo, G. Carlino, G. Cartacci, A.M. Casaus, J. Castellini, G. Cavallari, F. Cavallo, N. Cecchi, C. Cerrada, M. Cesaroni, F. Chamizo, M. Chang, Y.H. Chaturvedi, U.K. Chemarin, M. Chen, A. Chen, G. Chen, G.M. Chen, H.F. Chen, H.S. Chereau, X. Chiefari, G. Cifarelli, L. Cindolo, F. Civinini, C. Clare, I. Clare, R. Coignet, G. Colijn, A.P. Colino, N. Costantini, S. Cotorobai, F. Cozzoni, B. de la Cruz, B. Csilling, A. Cucciarelli, S. Dai, T.S. van Dalen, J.A. D'Alessandro, R. de Asmundis, R. Deglon, P. Degre, A. Deiters, K. Della Volpe, D. Denes, P. de Notaristefani, F. De Salvo, A. Diemoz, M. van Dierendonck, D. Di Lodovico, F. Dionisi, C. Dittmar, M. Dominguez, A. Doria, A. Dova, M.T. Duchesneau, D. Dufournand, D. Duinker, P. Duran, I. El Mamouni, H. Engler, A. Eppling, F.J. Erne, F.C. Extermann, P. Fabre, M. Faccini, R. Falagan, M.A. Falciano, S. Favara, A. Fay, J. Fedin, O. Felcini, M. Ferguson, T. Ferroni, F. Fesefeldt, H. Fiandrini, E. Field, J.H. Filthaut, F. Fisher, P.H. Fisk, I. Forconi, G. Fredj, L. Freudenreich, K. Furetta, C. Galaktionov, Iouri Ganguli, S.N. Garcia-Abia, Pablo Gataullin, M. Gau, S.S. Gentile, S. Gheordanescu, N. Giagu, S. Gong, Z.F. Grenier, Gerald Jean Grimm, O. Grunewald, M.W. van Gulik, R. Gupta, V.K. Gurtu, A. Gutay, L.J. Haas, D. Hasan, A. Hatzifotiadou, D. Hebbeker, T. Herve, Alain Hidas, P. Hirschfelder, J. Hofer, H. Holzner, G. Hoorani, H. Hou, S.R. Iashvili, I. Jin, B.N. Jones, Lawrence W. de Jong, P. Josa-Mutuberria, I. Khan, R.A. Kamrad, D. Kaur, M. Kienzle-Focacci, M.N. Kim, D. Kim, D.H. Kim, J.K. Kim, S.C. Kirkby, Jasper Kiss, D. Kittel, W. Klimentov, A. Konig, A.C. Kopp, A. Korolko, I. Koutsenko, V. Kraber, M. Kraemer, R.W. Krenz, W. Kunin, A. Lacentre, P. Ladron de Guevara, P. Laktineh, I. Landi, G. Lassila-Perini, K. Laurikainen, P. Lavorato, A. Lebeau, M. Lebedev, A. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, P. Lee, H.J. Le Goff, J.M. Leiste, R. Leonardi, Emanuele Levtchenko, P. Li, C. Lin, C.H. Lin, W.T. Linde, F.L. Lista, L. Liu, Z.A. Lohmann, W. Longo, E. Lu, Y.S. Lubelsmeyer, K. Luci, C. Luckey, David Lugnier, L. Luminari, L. Lustermann, W. Ma, W.G. Maity, M. Malgeri, L. Malinin, A. Mana, C. Mangeol, D. Marchesini, P. Marian, G. Martin, J.P. Marzano, F. Massaro, G.G.G. Mazumdar, K. McNeil, R.R. Mele, S. Merola, L. Meschini, M. Metzger, W.J. von der Mey, M. Migani, D. Mihul, A. Milcent, H. Mirabelli, G. Mnich, J. Mohanty, G.B. Molnar, P. Monteleoni, B. Moulik, T. Muanza, G.S. Muheim, F. Muijs, A.J.M. Napolitano, M. Nessi-Tedaldi, F. Newman, H. Niessen, T. Nisati, A. Kluge, Hannelies Oh, Y.D. Organtini, G. Ostonen, R. Palomares, C. Pandoulas, D. Paoletti, S. Paolucci, P. Park, H.K. Park, I.H. Pascale, G. Passaleva, G. Patricelli, S. Paul, Thomas Cantzon Pauluzzi, M. Paus, C. Pauss, F. Peach, D. Pedace, M. Pei, Y.J. Pensotti, S. Perret-Gallix, D. Petersen, B. Piccolo, D. Pieri, M. Piroue, P.A. Pistolesi, E. Plyaskin, V. Pohl, M. Pojidaev, V. Postema, H. Pothier, J. Produit, N. Prokofev, D.O. Prokofev, D. Quartieri, J. Rahal-Callot, G. Rahaman, M.A. Raja, N. Ramelli, R. Rancoita, P.G. Raven, G. Razis, P. Ren, D. Rescigno, M. Reucroft, S. van Rhee, T. Riemann, S. Riles, Keith Robohm, A. Rodin, J. Roe, B.P. Romero, L. Rosca, A. Rosier-Lees, S. Rubio, J.A. Ruschmeier, D. Rykaczewski, H. Sarkar, S. Salicio, J. Sanchez, E. Sanders, M.P. Sarakinos, M.E. Schafer, C. Schegelsky, V. Schmidt-Kaerst, S. Schmitz, D. Schopper, H. Schotanus, D.J. Schwenke, J. Schwering, G. Sciacca, C. Sciarrino, D. Seganti, A. Servoli, L. Shevchenko, S. Shivarov, N. Shoutko, V. Shumilov, E. Shvorob, A. Siedenburg, T. Son, D. Smith, B. Spillantini, P. Steuer, M. Stickland, D.P. Stone, A. Stone, H. Stoyanov, B. Straessner, A. Sudhakar, K. Sultanov, G. Sun, L.Z. Suter, H. Swain, J.D. Szillasi, Z. Tang, X.W. Tauscher, L. Taylor, L. Timmermans, Charles Ting, S.C.C. Ting, S.M. Tonwar, S.C. Toth, J. Tully, C. Tung, K.L. Uchida, Y. Ulbricht, J. Valente, E. Vesztergombi, G. Vetlitsky, I. Vicinanza, D. Viertel, G. Villa, S. Vivargent, M. Vlachos, S. Vodopianov, I. Vogel, H. Vogt, H. Vorobev, I. Vorobov, A.A. Vorvolakos, A. Wadhwa, M. Wallraff, W. Wang, M. Wang, X.L. Wang, Z.M. Weber, A. Weber, M. Wienemann, P. Wilkens, H. Wu, S.X. Wynhoff, S. Xia, L. Xu, Z.Z. Yang, B.Z. Yang, C.G. Yang, H.J. Yang, M. Ye, J.B. Yeh, S.C. You, J.M. Zalite, A. Zalite, Yu. Zhang, Z.P. Zhu, G.Y. Zhu, R.Y. Zichichi, A. Ziegler, F. Zilizi, G. Zoller, M. Formation of the $\eta_c$ in Two-Photon Collisions at LEP
title	Formation of the $\eta_c$ in Two-Photon Collisions at LEP
title_full	Formation of the $\eta_c$ in Two-Photon Collisions at LEP
title_fullStr	Formation of the $\eta_c$ in Two-Photon Collisions at LEP
title_full_unstemmed	Formation of the $\eta_c$ in Two-Photon Collisions at LEP
title_short	Formation of the $\eta_c$ in Two-Photon Collisions at LEP
title_sort	formation of the $\eta_c$ in two-photon collisions at lep
topic	Particle Physics - Experiment
url	https://dx.doi.org/10.1016/S0370-2693(99)00784-4 http://cds.cern.ch/record/389018
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formationoftheetacintwophotoncollisionsatlep AT bertuccib formationoftheetacintwophotoncollisionsatlep AT betevbl formationoftheetacintwophotoncollisionsatlep AT bhattacharyas formationoftheetacintwophotoncollisionsatlep AT biasinim formationoftheetacintwophotoncollisionsatlep AT bilanda formationoftheetacintwophotoncollisionsatlep AT blaisingjj formationoftheetacintwophotoncollisionsatlep AT blythsc formationoftheetacintwophotoncollisionsatlep AT bobbinkgj formationoftheetacintwophotoncollisionsatlep AT bohma formationoftheetacintwophotoncollisionsatlep AT boldizsarl formationoftheetacintwophotoncollisionsatlep AT borgiab formationoftheetacintwophotoncollisionsatlep AT bourilkovd formationoftheetacintwophotoncollisionsatlep AT bourquinm formationoftheetacintwophotoncollisionsatlep AT braccinis formationoftheetacintwophotoncollisionsatlep AT bransonjg formationoftheetacintwophotoncollisionsatlep AT brigljevicv formationoftheetacintwophotoncollisionsatlep AT brochuf formationoftheetacintwophotoncollisionsatlep AT buffinia formationoftheetacintwophotoncollisionsatlep AT buijsa formationoftheetacintwophotoncollisionsatlep AT burgerjd formationoftheetacintwophotoncollisionsatlep AT burgerwj formationoftheetacintwophotoncollisionsatlep AT busenitzj formationoftheetacintwophotoncollisionsatlep AT buttona formationoftheetacintwophotoncollisionsatlep AT caixd formationoftheetacintwophotoncollisionsatlep AT campanellimario formationoftheetacintwophotoncollisionsatlep AT capellm formationoftheetacintwophotoncollisionsatlep AT cararomeog formationoftheetacintwophotoncollisionsatlep AT carlinog formationoftheetacintwophotoncollisionsatlep AT cartacciam formationoftheetacintwophotoncollisionsatlep AT casausj formationoftheetacintwophotoncollisionsatlep AT castellinig formationoftheetacintwophotoncollisionsatlep AT cavallarif formationoftheetacintwophotoncollisionsatlep AT cavallon formationoftheetacintwophotoncollisionsatlep AT cecchic formationoftheetacintwophotoncollisionsatlep AT cerradam formationoftheetacintwophotoncollisionsatlep AT cesaronif formationoftheetacintwophotoncollisionsatlep AT chamizom formationoftheetacintwophotoncollisionsatlep AT changyh formationoftheetacintwophotoncollisionsatlep AT chaturvediuk formationoftheetacintwophotoncollisionsatlep AT chemarinm formationoftheetacintwophotoncollisionsatlep AT chena formationoftheetacintwophotoncollisionsatlep AT cheng formationoftheetacintwophotoncollisionsatlep AT chengm formationoftheetacintwophotoncollisionsatlep AT chenhf formationoftheetacintwophotoncollisionsatlep AT chenhs formationoftheetacintwophotoncollisionsatlep AT chereaux formationoftheetacintwophotoncollisionsatlep AT chiefarig formationoftheetacintwophotoncollisionsatlep AT cifarellil formationoftheetacintwophotoncollisionsatlep AT cindolof formationoftheetacintwophotoncollisionsatlep AT civininic formationoftheetacintwophotoncollisionsatlep AT clarei formationoftheetacintwophotoncollisionsatlep AT clarer formationoftheetacintwophotoncollisionsatlep AT coignetg formationoftheetacintwophotoncollisionsatlep AT colijnap formationoftheetacintwophotoncollisionsatlep AT colinon formationoftheetacintwophotoncollisionsatlep AT costantinis formationoftheetacintwophotoncollisionsatlep AT cotorobaif formationoftheetacintwophotoncollisionsatlep AT cozzonib formationoftheetacintwophotoncollisionsatlep AT delacruzb formationoftheetacintwophotoncollisionsatlep AT csillinga formationoftheetacintwophotoncollisionsatlep AT cucciarellis formationoftheetacintwophotoncollisionsatlep AT daits formationoftheetacintwophotoncollisionsatlep AT vandalenja formationoftheetacintwophotoncollisionsatlep AT dalessandror formationoftheetacintwophotoncollisionsatlep AT deasmundisr formationoftheetacintwophotoncollisionsatlep AT deglonp formationoftheetacintwophotoncollisionsatlep AT degrea formationoftheetacintwophotoncollisionsatlep AT deitersk formationoftheetacintwophotoncollisionsatlep AT dellavolped formationoftheetacintwophotoncollisionsatlep AT denesp formationoftheetacintwophotoncollisionsatlep AT denotaristefanif formationoftheetacintwophotoncollisionsatlep AT desalvoa formationoftheetacintwophotoncollisionsatlep AT diemozm formationoftheetacintwophotoncollisionsatlep AT vandierendonckd formationoftheetacintwophotoncollisionsatlep AT dilodovicof formationoftheetacintwophotoncollisionsatlep AT dionisic formationoftheetacintwophotoncollisionsatlep AT dittmarm formationoftheetacintwophotoncollisionsatlep AT domingueza formationoftheetacintwophotoncollisionsatlep AT doriaa formationoftheetacintwophotoncollisionsatlep AT dovamt formationoftheetacintwophotoncollisionsatlep AT duchesneaud formationoftheetacintwophotoncollisionsatlep AT dufournandd formationoftheetacintwophotoncollisionsatlep AT duinkerp formationoftheetacintwophotoncollisionsatlep AT durani formationoftheetacintwophotoncollisionsatlep AT elmamounih formationoftheetacintwophotoncollisionsatlep AT englera formationoftheetacintwophotoncollisionsatlep AT epplingfj formationoftheetacintwophotoncollisionsatlep AT ernefc formationoftheetacintwophotoncollisionsatlep AT extermannp formationoftheetacintwophotoncollisionsatlep AT fabrem formationoftheetacintwophotoncollisionsatlep AT faccinir formationoftheetacintwophotoncollisionsatlep AT falaganma formationoftheetacintwophotoncollisionsatlep AT falcianos formationoftheetacintwophotoncollisionsatlep AT favaraa formationoftheetacintwophotoncollisionsatlep AT fayj formationoftheetacintwophotoncollisionsatlep AT fedino formationoftheetacintwophotoncollisionsatlep AT felcinim formationoftheetacintwophotoncollisionsatlep AT fergusont formationoftheetacintwophotoncollisionsatlep AT ferronif formationoftheetacintwophotoncollisionsatlep AT fesefeldth formationoftheetacintwophotoncollisionsatlep AT fiandrinie formationoftheetacintwophotoncollisionsatlep AT fieldjh formationoftheetacintwophotoncollisionsatlep AT filthautf formationoftheetacintwophotoncollisionsatlep AT fisherph formationoftheetacintwophotoncollisionsatlep AT fiski formationoftheetacintwophotoncollisionsatlep AT forconig formationoftheetacintwophotoncollisionsatlep AT fredjl formationoftheetacintwophotoncollisionsatlep AT freudenreichk formationoftheetacintwophotoncollisionsatlep AT furettac formationoftheetacintwophotoncollisionsatlep AT galaktionoviouri formationoftheetacintwophotoncollisionsatlep AT gangulisn formationoftheetacintwophotoncollisionsatlep AT garciaabiapablo formationoftheetacintwophotoncollisionsatlep AT gataullinm formationoftheetacintwophotoncollisionsatlep AT gauss formationoftheetacintwophotoncollisionsatlep AT gentiles formationoftheetacintwophotoncollisionsatlep AT gheordanescun formationoftheetacintwophotoncollisionsatlep AT giagus formationoftheetacintwophotoncollisionsatlep AT gongzf formationoftheetacintwophotoncollisionsatlep AT greniergeraldjean formationoftheetacintwophotoncollisionsatlep AT grimmo formationoftheetacintwophotoncollisionsatlep AT grunewaldmw formationoftheetacintwophotoncollisionsatlep AT vangulikr formationoftheetacintwophotoncollisionsatlep AT guptavk formationoftheetacintwophotoncollisionsatlep AT gurtua formationoftheetacintwophotoncollisionsatlep AT gutaylj formationoftheetacintwophotoncollisionsatlep AT haasd formationoftheetacintwophotoncollisionsatlep AT hasana formationoftheetacintwophotoncollisionsatlep AT hatzifotiadoud formationoftheetacintwophotoncollisionsatlep AT hebbekert formationoftheetacintwophotoncollisionsatlep AT hervealain formationoftheetacintwophotoncollisionsatlep AT hidasp formationoftheetacintwophotoncollisionsatlep AT hirschfelderj formationoftheetacintwophotoncollisionsatlep AT hoferh formationoftheetacintwophotoncollisionsatlep AT holznerg formationoftheetacintwophotoncollisionsatlep AT hooranih formationoftheetacintwophotoncollisionsatlep AT housr formationoftheetacintwophotoncollisionsatlep AT iashvilii formationoftheetacintwophotoncollisionsatlep AT jinbn formationoftheetacintwophotoncollisionsatlep AT joneslawrencew formationoftheetacintwophotoncollisionsatlep AT dejongp formationoftheetacintwophotoncollisionsatlep AT josamutuberriai formationoftheetacintwophotoncollisionsatlep AT khanra formationoftheetacintwophotoncollisionsatlep AT kamradd formationoftheetacintwophotoncollisionsatlep AT kaurm formationoftheetacintwophotoncollisionsatlep AT kienzlefocaccimn formationoftheetacintwophotoncollisionsatlep AT kimd formationoftheetacintwophotoncollisionsatlep AT kimdh formationoftheetacintwophotoncollisionsatlep AT kimjk formationoftheetacintwophotoncollisionsatlep AT kimsc formationoftheetacintwophotoncollisionsatlep AT kirkbyjasper formationoftheetacintwophotoncollisionsatlep AT kissd formationoftheetacintwophotoncollisionsatlep AT kittelw formationoftheetacintwophotoncollisionsatlep AT klimentova formationoftheetacintwophotoncollisionsatlep AT konigac formationoftheetacintwophotoncollisionsatlep AT koppa formationoftheetacintwophotoncollisionsatlep AT korolkoi formationoftheetacintwophotoncollisionsatlep AT koutsenkov formationoftheetacintwophotoncollisionsatlep AT kraberm formationoftheetacintwophotoncollisionsatlep AT kraemerrw formationoftheetacintwophotoncollisionsatlep AT krenzw formationoftheetacintwophotoncollisionsatlep AT kunina formationoftheetacintwophotoncollisionsatlep AT lacentrep formationoftheetacintwophotoncollisionsatlep AT ladrondeguevarap formationoftheetacintwophotoncollisionsatlep AT laktinehi formationoftheetacintwophotoncollisionsatlep AT landig formationoftheetacintwophotoncollisionsatlep AT lassilaperinik formationoftheetacintwophotoncollisionsatlep AT laurikainenp formationoftheetacintwophotoncollisionsatlep AT lavoratoa formationoftheetacintwophotoncollisionsatlep AT lebeaum formationoftheetacintwophotoncollisionsatlep AT lebedeva formationoftheetacintwophotoncollisionsatlep AT lebrunp formationoftheetacintwophotoncollisionsatlep AT lecomtep formationoftheetacintwophotoncollisionsatlep AT lecoqp formationoftheetacintwophotoncollisionsatlep AT lecoultrep formationoftheetacintwophotoncollisionsatlep AT leehj formationoftheetacintwophotoncollisionsatlep AT legoffjm formationoftheetacintwophotoncollisionsatlep AT leister formationoftheetacintwophotoncollisionsatlep AT leonardiemanuele formationoftheetacintwophotoncollisionsatlep AT levtchenkop formationoftheetacintwophotoncollisionsatlep AT lic formationoftheetacintwophotoncollisionsatlep AT linch formationoftheetacintwophotoncollisionsatlep AT linwt formationoftheetacintwophotoncollisionsatlep AT lindefl formationoftheetacintwophotoncollisionsatlep AT listal formationoftheetacintwophotoncollisionsatlep AT liuza formationoftheetacintwophotoncollisionsatlep AT lohmannw formationoftheetacintwophotoncollisionsatlep AT longoe formationoftheetacintwophotoncollisionsatlep AT luys formationoftheetacintwophotoncollisionsatlep AT lubelsmeyerk formationoftheetacintwophotoncollisionsatlep AT lucic formationoftheetacintwophotoncollisionsatlep AT luckeydavid formationoftheetacintwophotoncollisionsatlep AT lugnierl formationoftheetacintwophotoncollisionsatlep AT luminaril formationoftheetacintwophotoncollisionsatlep AT lustermannw formationoftheetacintwophotoncollisionsatlep AT mawg formationoftheetacintwophotoncollisionsatlep AT maitym formationoftheetacintwophotoncollisionsatlep AT malgeril formationoftheetacintwophotoncollisionsatlep AT malinina formationoftheetacintwophotoncollisionsatlep AT manac formationoftheetacintwophotoncollisionsatlep AT mangeold formationoftheetacintwophotoncollisionsatlep AT marchesinip formationoftheetacintwophotoncollisionsatlep AT mariang formationoftheetacintwophotoncollisionsatlep AT martinjp formationoftheetacintwophotoncollisionsatlep AT marzanof formationoftheetacintwophotoncollisionsatlep AT massaroggg formationoftheetacintwophotoncollisionsatlep AT mazumdark formationoftheetacintwophotoncollisionsatlep AT mcneilrr formationoftheetacintwophotoncollisionsatlep AT meles formationoftheetacintwophotoncollisionsatlep AT merolal formationoftheetacintwophotoncollisionsatlep AT meschinim formationoftheetacintwophotoncollisionsatlep AT metzgerwj formationoftheetacintwophotoncollisionsatlep AT vondermeym formationoftheetacintwophotoncollisionsatlep AT miganid formationoftheetacintwophotoncollisionsatlep AT mihula formationoftheetacintwophotoncollisionsatlep AT milcenth formationoftheetacintwophotoncollisionsatlep AT mirabellig formationoftheetacintwophotoncollisionsatlep AT mnichj formationoftheetacintwophotoncollisionsatlep AT mohantygb formationoftheetacintwophotoncollisionsatlep AT molnarp formationoftheetacintwophotoncollisionsatlep AT monteleonib formationoftheetacintwophotoncollisionsatlep AT moulikt formationoftheetacintwophotoncollisionsatlep AT muanzags formationoftheetacintwophotoncollisionsatlep AT muheimf formationoftheetacintwophotoncollisionsatlep AT muijsajm formationoftheetacintwophotoncollisionsatlep AT napolitanom formationoftheetacintwophotoncollisionsatlep AT nessitedaldif formationoftheetacintwophotoncollisionsatlep AT newmanh formationoftheetacintwophotoncollisionsatlep AT niessent formationoftheetacintwophotoncollisionsatlep AT nisatia formationoftheetacintwophotoncollisionsatlep AT klugehannelies formationoftheetacintwophotoncollisionsatlep AT ohyd formationoftheetacintwophotoncollisionsatlep AT organtinig formationoftheetacintwophotoncollisionsatlep AT ostonenr formationoftheetacintwophotoncollisionsatlep AT palomaresc formationoftheetacintwophotoncollisionsatlep AT pandoulasd formationoftheetacintwophotoncollisionsatlep AT paolettis formationoftheetacintwophotoncollisionsatlep AT paoluccip formationoftheetacintwophotoncollisionsatlep AT parkhk formationoftheetacintwophotoncollisionsatlep AT parkih formationoftheetacintwophotoncollisionsatlep AT pascaleg formationoftheetacintwophotoncollisionsatlep AT passalevag formationoftheetacintwophotoncollisionsatlep AT patricellis formationoftheetacintwophotoncollisionsatlep AT paulthomascantzon formationoftheetacintwophotoncollisionsatlep AT pauluzzim formationoftheetacintwophotoncollisionsatlep AT pausc formationoftheetacintwophotoncollisionsatlep AT paussf formationoftheetacintwophotoncollisionsatlep AT peachd formationoftheetacintwophotoncollisionsatlep AT pedacem formationoftheetacintwophotoncollisionsatlep AT peiyj formationoftheetacintwophotoncollisionsatlep AT pensottis formationoftheetacintwophotoncollisionsatlep AT perretgallixd formationoftheetacintwophotoncollisionsatlep AT petersenb formationoftheetacintwophotoncollisionsatlep AT piccolod formationoftheetacintwophotoncollisionsatlep AT pierim formationoftheetacintwophotoncollisionsatlep AT pirouepa formationoftheetacintwophotoncollisionsatlep AT pistolesie formationoftheetacintwophotoncollisionsatlep AT plyaskinv formationoftheetacintwophotoncollisionsatlep AT pohlm formationoftheetacintwophotoncollisionsatlep AT pojidaevv formationoftheetacintwophotoncollisionsatlep AT postemah formationoftheetacintwophotoncollisionsatlep AT pothierj formationoftheetacintwophotoncollisionsatlep AT produitn formationoftheetacintwophotoncollisionsatlep AT prokofevdo formationoftheetacintwophotoncollisionsatlep AT prokofevd formationoftheetacintwophotoncollisionsatlep AT quartierij formationoftheetacintwophotoncollisionsatlep AT rahalcallotg formationoftheetacintwophotoncollisionsatlep AT rahamanma formationoftheetacintwophotoncollisionsatlep AT rajan formationoftheetacintwophotoncollisionsatlep AT ramellir formationoftheetacintwophotoncollisionsatlep AT rancoitapg formationoftheetacintwophotoncollisionsatlep AT raveng formationoftheetacintwophotoncollisionsatlep AT razisp formationoftheetacintwophotoncollisionsatlep AT rend formationoftheetacintwophotoncollisionsatlep AT rescignom formationoftheetacintwophotoncollisionsatlep AT reucrofts formationoftheetacintwophotoncollisionsatlep AT vanrheet formationoftheetacintwophotoncollisionsatlep AT riemanns formationoftheetacintwophotoncollisionsatlep AT rileskeith formationoftheetacintwophotoncollisionsatlep AT robohma formationoftheetacintwophotoncollisionsatlep AT rodinj formationoftheetacintwophotoncollisionsatlep AT roebp formationoftheetacintwophotoncollisionsatlep AT romerol formationoftheetacintwophotoncollisionsatlep AT roscaa formationoftheetacintwophotoncollisionsatlep AT rosierleess formationoftheetacintwophotoncollisionsatlep AT rubioja formationoftheetacintwophotoncollisionsatlep AT ruschmeierd formationoftheetacintwophotoncollisionsatlep AT rykaczewskih formationoftheetacintwophotoncollisionsatlep AT sarkars formationoftheetacintwophotoncollisionsatlep AT salicioj formationoftheetacintwophotoncollisionsatlep AT sancheze formationoftheetacintwophotoncollisionsatlep AT sandersmp formationoftheetacintwophotoncollisionsatlep AT sarakinosme formationoftheetacintwophotoncollisionsatlep AT schaferc formationoftheetacintwophotoncollisionsatlep AT schegelskyv formationoftheetacintwophotoncollisionsatlep AT schmidtkaersts formationoftheetacintwophotoncollisionsatlep AT schmitzd formationoftheetacintwophotoncollisionsatlep AT schopperh formationoftheetacintwophotoncollisionsatlep AT schotanusdj formationoftheetacintwophotoncollisionsatlep AT schwenkej formationoftheetacintwophotoncollisionsatlep AT schweringg formationoftheetacintwophotoncollisionsatlep AT sciaccac formationoftheetacintwophotoncollisionsatlep AT sciarrinod formationoftheetacintwophotoncollisionsatlep AT segantia formationoftheetacintwophotoncollisionsatlep AT servolil formationoftheetacintwophotoncollisionsatlep AT shevchenkos formationoftheetacintwophotoncollisionsatlep AT shivarovn formationoftheetacintwophotoncollisionsatlep AT shoutkov formationoftheetacintwophotoncollisionsatlep AT shumilove formationoftheetacintwophotoncollisionsatlep AT shvoroba formationoftheetacintwophotoncollisionsatlep AT siedenburgt formationoftheetacintwophotoncollisionsatlep AT sond formationoftheetacintwophotoncollisionsatlep AT smithb formationoftheetacintwophotoncollisionsatlep AT spillantinip formationoftheetacintwophotoncollisionsatlep AT steuerm formationoftheetacintwophotoncollisionsatlep AT sticklanddp formationoftheetacintwophotoncollisionsatlep AT stonea formationoftheetacintwophotoncollisionsatlep AT stoneh formationoftheetacintwophotoncollisionsatlep AT stoyanovb formationoftheetacintwophotoncollisionsatlep AT straessnera formationoftheetacintwophotoncollisionsatlep AT sudhakark formationoftheetacintwophotoncollisionsatlep AT sultanovg formationoftheetacintwophotoncollisionsatlep AT sunlz formationoftheetacintwophotoncollisionsatlep AT suterh formationoftheetacintwophotoncollisionsatlep AT swainjd formationoftheetacintwophotoncollisionsatlep AT szillasiz formationoftheetacintwophotoncollisionsatlep AT tangxw formationoftheetacintwophotoncollisionsatlep AT tauscherl formationoftheetacintwophotoncollisionsatlep AT taylorl formationoftheetacintwophotoncollisionsatlep AT timmermanscharles formationoftheetacintwophotoncollisionsatlep AT tingscc formationoftheetacintwophotoncollisionsatlep AT tingsm formationoftheetacintwophotoncollisionsatlep AT tonwarsc formationoftheetacintwophotoncollisionsatlep AT tothj formationoftheetacintwophotoncollisionsatlep AT tullyc formationoftheetacintwophotoncollisionsatlep AT tungkl formationoftheetacintwophotoncollisionsatlep AT uchiday formationoftheetacintwophotoncollisionsatlep AT ulbrichtj formationoftheetacintwophotoncollisionsatlep AT valentee formationoftheetacintwophotoncollisionsatlep AT vesztergombig formationoftheetacintwophotoncollisionsatlep AT vetlitskyi formationoftheetacintwophotoncollisionsatlep AT vicinanzad formationoftheetacintwophotoncollisionsatlep AT viertelg formationoftheetacintwophotoncollisionsatlep AT villas formationoftheetacintwophotoncollisionsatlep AT vivargentm formationoftheetacintwophotoncollisionsatlep AT vlachoss formationoftheetacintwophotoncollisionsatlep AT vodopianovi formationoftheetacintwophotoncollisionsatlep AT vogelh formationoftheetacintwophotoncollisionsatlep AT vogth formationoftheetacintwophotoncollisionsatlep AT vorobevi formationoftheetacintwophotoncollisionsatlep AT vorobovaa formationoftheetacintwophotoncollisionsatlep AT vorvolakosa formationoftheetacintwophotoncollisionsatlep AT wadhwam formationoftheetacintwophotoncollisionsatlep AT wallraffw formationoftheetacintwophotoncollisionsatlep AT wangm formationoftheetacintwophotoncollisionsatlep AT wangxl formationoftheetacintwophotoncollisionsatlep AT wangzm formationoftheetacintwophotoncollisionsatlep AT webera formationoftheetacintwophotoncollisionsatlep AT weberm formationoftheetacintwophotoncollisionsatlep AT wienemannp formationoftheetacintwophotoncollisionsatlep AT wilkensh formationoftheetacintwophotoncollisionsatlep AT wusx formationoftheetacintwophotoncollisionsatlep AT wynhoffs formationoftheetacintwophotoncollisionsatlep AT xial formationoftheetacintwophotoncollisionsatlep AT xuzz formationoftheetacintwophotoncollisionsatlep AT yangbz formationoftheetacintwophotoncollisionsatlep AT yangcg formationoftheetacintwophotoncollisionsatlep AT yanghj formationoftheetacintwophotoncollisionsatlep AT yangm formationoftheetacintwophotoncollisionsatlep AT yejb formationoftheetacintwophotoncollisionsatlep AT yehsc formationoftheetacintwophotoncollisionsatlep AT youjm formationoftheetacintwophotoncollisionsatlep AT zalitea formationoftheetacintwophotoncollisionsatlep AT zaliteyu formationoftheetacintwophotoncollisionsatlep AT zhangzp formationoftheetacintwophotoncollisionsatlep AT zhugy formationoftheetacintwophotoncollisionsatlep AT zhury formationoftheetacintwophotoncollisionsatlep AT zichichia formationoftheetacintwophotoncollisionsatlep AT zieglerf formationoftheetacintwophotoncollisionsatlep AT zilizig formationoftheetacintwophotoncollisionsatlep AT zollerm formationoftheetacintwophotoncollisionsatlep

Formation of the $\eta_c$ in Two-Photon Collisions at LEP

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