Study of Charm Production in Z Decays

The production rates of D*+-, Ds*+-, D+-, D0 / D0bar, Ds+, and Lambda_c in Z to ccbar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+- is well described as the sum of three contributions: charm hadronisation, b hadron decays a...

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Detalles Bibliográficos
Autores principales: Barate, R., Decamp, D., Ghez, Philippe, Goy, C., Lees, J.P., Merle, E., Minard, M.N., Pietrzyk, B., Alemany, R., Casado, M.P., Chmeissani, M., Crespo, J.M., Fernandez, E., Fernandez-Bosman, M., Garrido, L., Grauges, E., Juste, A., Martinez, M., Merino, G., Miquel, R., Mir, L.M., Pacheco, A., Park, I.C., Riu, I., Colaleo, A., Creanza, D., De Palma, M., Iaselli, G., Maggi, G., Maggi, M., Nuzzo, S., Ranieri, A., Raso, G., Ruggieri, F., Selvaggi, G., Silvestris, L., Tempesta, P., Tricomi, A., Zito, G., Huang, X., Lin, J., Ouyang, Q., Wang, T., Xie, Y., Xu, R., Xue, S., Zhang, J., Zhang, L., Zhao, W., Abbaneo, D., Becker, U., Boix, G., Cattaneo, M., Cerutti, F., Ciulli, V., Dissertori, G., Drevermann, H., Forty, R.W., Frank, M., Greening, T.C., Halley, A.W., Hansen, J.B., Harvey, John, Janot, P., Jost, B., Lehraus, I., Leroy, O., Mato, P., Minten, A., Moutoussi, A., Ranjard, F., Rolandi, Gigi, Schlatter, D., Schmitt, M., Schneider, O., Spagnolo, P., Tejessy, W., Teubert, F., Tomalin, I.R., Tournefier, E., Wright, A.E., Ajaltouni, Z., Badaud, F., Chazelle, G., Deschamps, O., Falvard, A., Ferdi, C., Gay, P., Guicheney, C., Henrard, P., Jousset, J., Michel, B., Monteil, S., Montret, J.C., Pallin, D., Perret, P., Podlyski, F., Hansen, J.D., Hansen, J.R., Hansen, P.H., Nilsson, B.S., Rensch, B., Waananen, A., Daskalakis, G., Kyriakis, A., Markou, C., Simopoulou, E., Siotis, I., Vayaki, A., Blondel, A., Bonneaud, G., Brient, J.C., Rouge, A., Rumpf, M., Swynghedauw, M., Verderi, M., Videau, H., Focardi, E., Parrini, G., Zachariadou, K., Cavanaugh, R., Corden, M., Georgiopoulos, C., Antonelli, A., Bencivenni, G., Bologna, G., Bossi, F., Campana, P., Capon, G., Chiarella, V., Laurelli, P., Mannocchi, G., Murtas, F., Murtas, G.P., Passalacqua, L., Pepe-Altarelli, M., Curtis, L., Lynch, J.G., Negus, P., O'Shea, V., Raine, C., Teixeira-Dias, P., Thompson, A.S., Buchmuller, O., Dhamotharan, S., Geweniger, C., Graefe, G., Hanke, P., Hansper, G., Hepp, V., Kluge, E.E., Putzer, A., Sommer, J., Tittel, K., Werner, S., Wunsch, M., Beuselinck, R., Binnie, D.M., Cameron, W., Dornan, P.J., Girone, M., Goodsir, S., Martin, E.B., Marinelli, N., Sciaba, A., Sedgbeer, J.K., Thomson, Evelyn J., Williams, M.D., Ghete, V.M., Girtler, P., Kneringer, E., Kuhn, D., Rudolph, G., Bowdery, C.K., Buck, P.G., Finch, A.J., Foster, F., Hughes, G., Jones, R.W.L., Robertson, N.A., Williams, M.I., Giehl, I., Jakobs, K., Kleinknecht, K., Quast, G., Renk, B., Rohne, E., Sander, H.G., Wachsmuth, H., Zeitnitz, C., Aubert, J.J., Benchouk, C., Bonissent, A., Carr, J., Coyle, P., Etienne, F., Motsch, F., Payre, P., Rousseau, D., Talby, M., Thulasidas, M., Aleppo, M., Antonelli, M., Ragusa, F., Buescher, Volker, Dietl, H., Ganis, G., Huttmann, K., Lutjens, G., Mannert, C., Manner, W., Moser, H.G., Schael, S., Settles, R., Seywerd, H., Stenzel, H., Wiedenmann, W., Wolf, G., Azzurri, P., Boucrot, J., Callot, O., Chen, S., Cordier, A., Davier, M., Duflot, L., Grivaz, J.F., Heusse, P., Jacholkowska, A., Le Diberder, F., Lefrancois, J., Lutz, A.M., Schune, M.H., Veillet, J.J., Videau, I., Zerwas, D., Bagliesi, Giuseppe, Bettarini, S., Boccali, T., Bozzi, C., Calderini, G., Dell'Orso, R., Ferrante, I., Foa, L., Giassi, A., Gregorio, A., Ligabue, F., Lusiani, A., Marrocchesi, P.S., Messineo, A., Palla, F., Rizzo, G., Sanguinetti, G., Sguazzoni, G., Tenchini, R., Vannini, C., Venturi, A., Verdini, P.G., Blair, G.A., Cowan, G., Green, M.G., Medcalf, T., Strong, J.A., von Wimmersperg-Toeller, J.H., Botterill, D.R., Clifft, R.W., Edgecock, T.R., Norton, P.R., Thompson, J.C., Bloch-Devaux, Brigitte, Colas, P., Emery, S., Kozanecki, W., Lancon, E., Lemaire, M.C., Locci, E., Perez, P., Rander, J., Renardy, J.F., Roussarie, A., Schuller, J.P., Schwindling, J., Trabelsi, A., Vallage, B., Black, S.N., Dann, J.H., Johnson, R.P., Kim, H.Y., Konstantinidis, N., Litke, A.M., McNeil, M.A., Taylor, G., Booth, C.N., Cartwright, S., Combley, F., Kelly, M.S., Lehto, M., Thompson, L.F., Affholderbach, K., Boehrer, Armin, Brandt, S., Grupen, C., Hess, J., Koob, C., Misiejuk, A., Prange, G., Sieler, U., Giannini, G., Gobbo, B., Rothberg, J., Wasserbaech, S., Armstrong, S.R., Elmer, P., Ferguson, D.P.S., Gao, Y., Gonzalez, S., Hayes, O.J., Hu, H., Jin, S., McNamara, P.A., III, Nielsen, J., Orejudos, W., Pan, Y.B., Saadi, Y., Scott, I.J., Walsh, J., Wu, Sau Lan, Wu, X., Zobernig, G.
Lenguaje:eng
Publicado: 1999
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1007/s100520000421
http://cds.cern.ch/record/399993
_version_ 1780894101867069440
author Barate, R.
Decamp, D.
Ghez, Philippe
Goy, C.
Lees, J.P.
Merle, E.
Minard, M.N.
Pietrzyk, B.
Alemany, R.
Casado, M.P.
Chmeissani, M.
Crespo, J.M.
Fernandez, E.
Fernandez-Bosman, M.
Garrido, L.
Grauges, E.
Juste, A.
Martinez, M.
Merino, G.
Miquel, R.
Mir, L.M.
Pacheco, A.
Park, I.C.
Riu, I.
Colaleo, A.
Creanza, D.
De Palma, M.
Iaselli, G.
Maggi, G.
Maggi, M.
Nuzzo, S.
Ranieri, A.
Raso, G.
Ruggieri, F.
Selvaggi, G.
Silvestris, L.
Tempesta, P.
Tricomi, A.
Zito, G.
Huang, X.
Lin, J.
Ouyang, Q.
Wang, T.
Xie, Y.
Xu, R.
Xue, S.
Zhang, J.
Zhang, L.
Zhao, W.
Abbaneo, D.
Becker, U.
Boix, G.
Cattaneo, M.
Cerutti, F.
Ciulli, V.
Dissertori, G.
Drevermann, H.
Forty, R.W.
Frank, M.
Greening, T.C.
Halley, A.W.
Hansen, J.B.
Harvey, John
Janot, P.
Jost, B.
Lehraus, I.
Leroy, O.
Mato, P.
Minten, A.
Moutoussi, A.
Ranjard, F.
Rolandi, Gigi
Schlatter, D.
Schmitt, M.
Schneider, O.
Spagnolo, P.
Tejessy, W.
Teubert, F.
Tomalin, I.R.
Tournefier, E.
Wright, A.E.
Ajaltouni, Z.
Badaud, F.
Chazelle, G.
Deschamps, O.
Falvard, A.
Ferdi, C.
Gay, P.
Guicheney, C.
Henrard, P.
Jousset, J.
Michel, B.
Monteil, S.
Montret, J.C.
Pallin, D.
Perret, P.
Podlyski, F.
Hansen, J.D.
Hansen, J.R.
Hansen, P.H.
Nilsson, B.S.
Rensch, B.
Waananen, A.
Daskalakis, G.
Kyriakis, A.
Markou, C.
Simopoulou, E.
Siotis, I.
Vayaki, A.
Blondel, A.
Bonneaud, G.
Brient, J.C.
Rouge, A.
Rumpf, M.
Swynghedauw, M.
Verderi, M.
Videau, H.
Focardi, E.
Parrini, G.
Zachariadou, K.
Cavanaugh, R.
Corden, M.
Georgiopoulos, C.
Antonelli, A.
Bencivenni, G.
Bologna, G.
Bossi, F.
Campana, P.
Capon, G.
Chiarella, V.
Laurelli, P.
Mannocchi, G.
Murtas, F.
Murtas, G.P.
Passalacqua, L.
Pepe-Altarelli, M.
Curtis, L.
Lynch, J.G.
Negus, P.
O'Shea, V.
Raine, C.
Teixeira-Dias, P.
Thompson, A.S.
Buchmuller, O.
Dhamotharan, S.
Geweniger, C.
Graefe, G.
Hanke, P.
Hansper, G.
Hepp, V.
Kluge, E.E.
Putzer, A.
Sommer, J.
Tittel, K.
Werner, S.
Wunsch, M.
Beuselinck, R.
Binnie, D.M.
Cameron, W.
Dornan, P.J.
Girone, M.
Goodsir, S.
Martin, E.B.
Marinelli, N.
Sciaba, A.
Sedgbeer, J.K.
Thomson, Evelyn J.
Williams, M.D.
Ghete, V.M.
Girtler, P.
Kneringer, E.
Kuhn, D.
Rudolph, G.
Bowdery, C.K.
Buck, P.G.
Finch, A.J.
Foster, F.
Hughes, G.
Jones, R.W.L.
Robertson, N.A.
Williams, M.I.
Giehl, I.
Jakobs, K.
Kleinknecht, K.
Quast, G.
Renk, B.
Rohne, E.
Sander, H.G.
Wachsmuth, H.
Zeitnitz, C.
Aubert, J.J.
Benchouk, C.
Bonissent, A.
Carr, J.
Coyle, P.
Etienne, F.
Motsch, F.
Payre, P.
Rousseau, D.
Talby, M.
Thulasidas, M.
Aleppo, M.
Antonelli, M.
Ragusa, F.
Buescher, Volker
Dietl, H.
Ganis, G.
Huttmann, K.
Lutjens, G.
Mannert, C.
Manner, W.
Moser, H.G.
Schael, S.
Settles, R.
Seywerd, H.
Stenzel, H.
Wiedenmann, W.
Wolf, G.
Azzurri, P.
Boucrot, J.
Callot, O.
Chen, S.
Cordier, A.
Davier, M.
Duflot, L.
Grivaz, J.F.
Heusse, P.
Jacholkowska, A.
Le Diberder, F.
Lefrancois, J.
Lutz, A.M.
Schune, M.H.
Veillet, J.J.
Videau, I.
Zerwas, D.
Bagliesi, Giuseppe
Bettarini, S.
Boccali, T.
Bozzi, C.
Calderini, G.
Dell'Orso, R.
Ferrante, I.
Foa, L.
Giassi, A.
Gregorio, A.
Ligabue, F.
Lusiani, A.
Marrocchesi, P.S.
Messineo, A.
Palla, F.
Rizzo, G.
Sanguinetti, G.
Sguazzoni, G.
Tenchini, R.
Vannini, C.
Venturi, A.
Verdini, P.G.
Blair, G.A.
Cowan, G.
Green, M.G.
Medcalf, T.
Strong, J.A.
von Wimmersperg-Toeller, J.H.
Botterill, D.R.
Clifft, R.W.
Edgecock, T.R.
Norton, P.R.
Thompson, J.C.
Bloch-Devaux, Brigitte
Colas, P.
Emery, S.
Kozanecki, W.
Lancon, E.
Lemaire, M.C.
Locci, E.
Perez, P.
Rander, J.
Renardy, J.F.
Roussarie, A.
Schuller, J.P.
Schwindling, J.
Trabelsi, A.
Vallage, B.
Black, S.N.
Dann, J.H.
Johnson, R.P.
Kim, H.Y.
Konstantinidis, N.
Litke, A.M.
McNeil, M.A.
Taylor, G.
Booth, C.N.
Cartwright, S.
Combley, F.
Kelly, M.S.
Lehto, M.
Thompson, L.F.
Affholderbach, K.
Boehrer, Armin
Brandt, S.
Grupen, C.
Hess, J.
Koob, C.
Misiejuk, A.
Prange, G.
Sieler, U.
Giannini, G.
Gobbo, B.
Rothberg, J.
Wasserbaech, S.
Armstrong, S.R.
Elmer, P.
Ferguson, D.P.S.
Gao, Y.
Gonzalez, S.
Hayes, O.J.
Hu, H.
Jin, S.
McNamara, P.A., III
Nielsen, J.
Orejudos, W.
Pan, Y.B.
Saadi, Y.
Scott, I.J.
Walsh, J.
Wu, Sau Lan
Wu, X.
Zobernig, G.
author_facet Barate, R.
Decamp, D.
Ghez, Philippe
Goy, C.
Lees, J.P.
Merle, E.
Minard, M.N.
Pietrzyk, B.
Alemany, R.
Casado, M.P.
Chmeissani, M.
Crespo, J.M.
Fernandez, E.
Fernandez-Bosman, M.
Garrido, L.
Grauges, E.
Juste, A.
Martinez, M.
Merino, G.
Miquel, R.
Mir, L.M.
Pacheco, A.
Park, I.C.
Riu, I.
Colaleo, A.
Creanza, D.
De Palma, M.
Iaselli, G.
Maggi, G.
Maggi, M.
Nuzzo, S.
Ranieri, A.
Raso, G.
Ruggieri, F.
Selvaggi, G.
Silvestris, L.
Tempesta, P.
Tricomi, A.
Zito, G.
Huang, X.
Lin, J.
Ouyang, Q.
Wang, T.
Xie, Y.
Xu, R.
Xue, S.
Zhang, J.
Zhang, L.
Zhao, W.
Abbaneo, D.
Becker, U.
Boix, G.
Cattaneo, M.
Cerutti, F.
Ciulli, V.
Dissertori, G.
Drevermann, H.
Forty, R.W.
Frank, M.
Greening, T.C.
Halley, A.W.
Hansen, J.B.
Harvey, John
Janot, P.
Jost, B.
Lehraus, I.
Leroy, O.
Mato, P.
Minten, A.
Moutoussi, A.
Ranjard, F.
Rolandi, Gigi
Schlatter, D.
Schmitt, M.
Schneider, O.
Spagnolo, P.
Tejessy, W.
Teubert, F.
Tomalin, I.R.
Tournefier, E.
Wright, A.E.
Ajaltouni, Z.
Badaud, F.
Chazelle, G.
Deschamps, O.
Falvard, A.
Ferdi, C.
Gay, P.
Guicheney, C.
Henrard, P.
Jousset, J.
Michel, B.
Monteil, S.
Montret, J.C.
Pallin, D.
Perret, P.
Podlyski, F.
Hansen, J.D.
Hansen, J.R.
Hansen, P.H.
Nilsson, B.S.
Rensch, B.
Waananen, A.
Daskalakis, G.
Kyriakis, A.
Markou, C.
Simopoulou, E.
Siotis, I.
Vayaki, A.
Blondel, A.
Bonneaud, G.
Brient, J.C.
Rouge, A.
Rumpf, M.
Swynghedauw, M.
Verderi, M.
Videau, H.
Focardi, E.
Parrini, G.
Zachariadou, K.
Cavanaugh, R.
Corden, M.
Georgiopoulos, C.
Antonelli, A.
Bencivenni, G.
Bologna, G.
Bossi, F.
Campana, P.
Capon, G.
Chiarella, V.
Laurelli, P.
Mannocchi, G.
Murtas, F.
Murtas, G.P.
Passalacqua, L.
Pepe-Altarelli, M.
Curtis, L.
Lynch, J.G.
Negus, P.
O'Shea, V.
Raine, C.
Teixeira-Dias, P.
Thompson, A.S.
Buchmuller, O.
Dhamotharan, S.
Geweniger, C.
Graefe, G.
Hanke, P.
Hansper, G.
Hepp, V.
Kluge, E.E.
Putzer, A.
Sommer, J.
Tittel, K.
Werner, S.
Wunsch, M.
Beuselinck, R.
Binnie, D.M.
Cameron, W.
Dornan, P.J.
Girone, M.
Goodsir, S.
Martin, E.B.
Marinelli, N.
Sciaba, A.
Sedgbeer, J.K.
Thomson, Evelyn J.
Williams, M.D.
Ghete, V.M.
Girtler, P.
Kneringer, E.
Kuhn, D.
Rudolph, G.
Bowdery, C.K.
Buck, P.G.
Finch, A.J.
Foster, F.
Hughes, G.
Jones, R.W.L.
Robertson, N.A.
Williams, M.I.
Giehl, I.
Jakobs, K.
Kleinknecht, K.
Quast, G.
Renk, B.
Rohne, E.
Sander, H.G.
Wachsmuth, H.
Zeitnitz, C.
Aubert, J.J.
Benchouk, C.
Bonissent, A.
Carr, J.
Coyle, P.
Etienne, F.
Motsch, F.
Payre, P.
Rousseau, D.
Talby, M.
Thulasidas, M.
Aleppo, M.
Antonelli, M.
Ragusa, F.
Buescher, Volker
Dietl, H.
Ganis, G.
Huttmann, K.
Lutjens, G.
Mannert, C.
Manner, W.
Moser, H.G.
Schael, S.
Settles, R.
Seywerd, H.
Stenzel, H.
Wiedenmann, W.
Wolf, G.
Azzurri, P.
Boucrot, J.
Callot, O.
Chen, S.
Cordier, A.
Davier, M.
Duflot, L.
Grivaz, J.F.
Heusse, P.
Jacholkowska, A.
Le Diberder, F.
Lefrancois, J.
Lutz, A.M.
Schune, M.H.
Veillet, J.J.
Videau, I.
Zerwas, D.
Bagliesi, Giuseppe
Bettarini, S.
Boccali, T.
Bozzi, C.
Calderini, G.
Dell'Orso, R.
Ferrante, I.
Foa, L.
Giassi, A.
Gregorio, A.
Ligabue, F.
Lusiani, A.
Marrocchesi, P.S.
Messineo, A.
Palla, F.
Rizzo, G.
Sanguinetti, G.
Sguazzoni, G.
Tenchini, R.
Vannini, C.
Venturi, A.
Verdini, P.G.
Blair, G.A.
Cowan, G.
Green, M.G.
Medcalf, T.
Strong, J.A.
von Wimmersperg-Toeller, J.H.
Botterill, D.R.
Clifft, R.W.
Edgecock, T.R.
Norton, P.R.
Thompson, J.C.
Bloch-Devaux, Brigitte
Colas, P.
Emery, S.
Kozanecki, W.
Lancon, E.
Lemaire, M.C.
Locci, E.
Perez, P.
Rander, J.
Renardy, J.F.
Roussarie, A.
Schuller, J.P.
Schwindling, J.
Trabelsi, A.
Vallage, B.
Black, S.N.
Dann, J.H.
Johnson, R.P.
Kim, H.Y.
Konstantinidis, N.
Litke, A.M.
McNeil, M.A.
Taylor, G.
Booth, C.N.
Cartwright, S.
Combley, F.
Kelly, M.S.
Lehto, M.
Thompson, L.F.
Affholderbach, K.
Boehrer, Armin
Brandt, S.
Grupen, C.
Hess, J.
Koob, C.
Misiejuk, A.
Prange, G.
Sieler, U.
Giannini, G.
Gobbo, B.
Rothberg, J.
Wasserbaech, S.
Armstrong, S.R.
Elmer, P.
Ferguson, D.P.S.
Gao, Y.
Gonzalez, S.
Hayes, O.J.
Hu, H.
Jin, S.
McNamara, P.A., III
Nielsen, J.
Orejudos, W.
Pan, Y.B.
Saadi, Y.
Scott, I.J.
Walsh, J.
Wu, Sau Lan
Wu, X.
Zobernig, G.
author_sort Barate, R.
collection CERN
description The production rates of D*+-, Ds*+-, D+-, D0 / D0bar, Ds+, and Lambda_c in Z to ccbar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+- is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D*+ is found to be f(c to D*+) = 0.233 +- 0.010 (stat.) +- 0.011 (syst.). The average fraction of the beam energy carried by D*+- mesons in Z to cc events is measured to be < X_E (D*+-) >_cc = 0.4878 +- 0.0046 (stat.) +- 0.0061 (syst.). The D*+- energy and the hemisphere mass imbalance distributions are simultaneously used to measure the fraction of hadronic Z decays in which a gluon splits to a cc pair: n_{gluon to cc} = (3.23 +- 0.48 (stat.) +- 0.53 (syst.) %. The ratio of the Vector/(Vector+Pseudoscalar) production rates in charmed mesons is found to be P_V = 0.595 +- 0.045. The fractional decay width of the Z into cc pairs is determined from the sum of the production rates for various weakly decaying charmed states to be Rc = 0.1738 +- 0.0047 (stat.) +- 0.0116 (syst.).
id cern-399993
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-3999932022-05-12T02:53:52Zdoi:10.1007/s100520000421http://cds.cern.ch/record/399993engBarate, R.Decamp, D.Ghez, PhilippeGoy, C.Lees, J.P.Merle, E.Minard, M.N.Pietrzyk, B.Alemany, R.Casado, M.P.Chmeissani, M.Crespo, J.M.Fernandez, E.Fernandez-Bosman, M.Garrido, L.Grauges, E.Juste, A.Martinez, M.Merino, G.Miquel, R.Mir, L.M.Pacheco, A.Park, I.C.Riu, I.Colaleo, A.Creanza, D.De Palma, M.Iaselli, G.Maggi, G.Maggi, M.Nuzzo, S.Ranieri, A.Raso, G.Ruggieri, F.Selvaggi, G.Silvestris, L.Tempesta, P.Tricomi, A.Zito, G.Huang, X.Lin, J.Ouyang, Q.Wang, T.Xie, Y.Xu, R.Xue, S.Zhang, J.Zhang, L.Zhao, W.Abbaneo, D.Becker, U.Boix, G.Cattaneo, M.Cerutti, F.Ciulli, V.Dissertori, G.Drevermann, H.Forty, R.W.Frank, M.Greening, T.C.Halley, A.W.Hansen, J.B.Harvey, JohnJanot, P.Jost, B.Lehraus, I.Leroy, O.Mato, P.Minten, A.Moutoussi, A.Ranjard, F.Rolandi, GigiSchlatter, D.Schmitt, M.Schneider, O.Spagnolo, P.Tejessy, W.Teubert, F.Tomalin, I.R.Tournefier, E.Wright, A.E.Ajaltouni, Z.Badaud, F.Chazelle, G.Deschamps, O.Falvard, A.Ferdi, C.Gay, P.Guicheney, C.Henrard, P.Jousset, J.Michel, B.Monteil, S.Montret, J.C.Pallin, D.Perret, P.Podlyski, F.Hansen, J.D.Hansen, J.R.Hansen, P.H.Nilsson, B.S.Rensch, B.Waananen, A.Daskalakis, G.Kyriakis, A.Markou, C.Simopoulou, E.Siotis, I.Vayaki, A.Blondel, A.Bonneaud, G.Brient, J.C.Rouge, A.Rumpf, M.Swynghedauw, M.Verderi, M.Videau, H.Focardi, E.Parrini, G.Zachariadou, K.Cavanaugh, R.Corden, M.Georgiopoulos, C.Antonelli, A.Bencivenni, G.Bologna, G.Bossi, F.Campana, P.Capon, G.Chiarella, V.Laurelli, P.Mannocchi, G.Murtas, F.Murtas, G.P.Passalacqua, L.Pepe-Altarelli, M.Curtis, L.Lynch, J.G.Negus, P.O'Shea, V.Raine, C.Teixeira-Dias, P.Thompson, A.S.Buchmuller, O.Dhamotharan, S.Geweniger, C.Graefe, G.Hanke, P.Hansper, G.Hepp, V.Kluge, E.E.Putzer, A.Sommer, J.Tittel, K.Werner, S.Wunsch, M.Beuselinck, R.Binnie, D.M.Cameron, W.Dornan, P.J.Girone, M.Goodsir, S.Martin, E.B.Marinelli, N.Sciaba, A.Sedgbeer, J.K.Thomson, Evelyn J.Williams, M.D.Ghete, V.M.Girtler, P.Kneringer, E.Kuhn, D.Rudolph, G.Bowdery, C.K.Buck, P.G.Finch, A.J.Foster, F.Hughes, G.Jones, R.W.L.Robertson, N.A.Williams, M.I.Giehl, I.Jakobs, K.Kleinknecht, K.Quast, G.Renk, B.Rohne, E.Sander, H.G.Wachsmuth, H.Zeitnitz, C.Aubert, J.J.Benchouk, C.Bonissent, A.Carr, J.Coyle, P.Etienne, F.Motsch, F.Payre, P.Rousseau, D.Talby, M.Thulasidas, M.Aleppo, M.Antonelli, M.Ragusa, F.Buescher, VolkerDietl, H.Ganis, G.Huttmann, K.Lutjens, G.Mannert, C.Manner, W.Moser, H.G.Schael, S.Settles, R.Seywerd, H.Stenzel, H.Wiedenmann, W.Wolf, G.Azzurri, P.Boucrot, J.Callot, O.Chen, S.Cordier, A.Davier, M.Duflot, L.Grivaz, J.F.Heusse, P.Jacholkowska, A.Le Diberder, F.Lefrancois, J.Lutz, A.M.Schune, M.H.Veillet, J.J.Videau, I.Zerwas, D.Bagliesi, GiuseppeBettarini, S.Boccali, T.Bozzi, C.Calderini, G.Dell'Orso, R.Ferrante, I.Foa, L.Giassi, A.Gregorio, A.Ligabue, F.Lusiani, A.Marrocchesi, P.S.Messineo, A.Palla, F.Rizzo, G.Sanguinetti, G.Sguazzoni, G.Tenchini, R.Vannini, C.Venturi, A.Verdini, P.G.Blair, G.A.Cowan, G.Green, M.G.Medcalf, T.Strong, J.A.von Wimmersperg-Toeller, J.H.Botterill, D.R.Clifft, R.W.Edgecock, T.R.Norton, P.R.Thompson, J.C.Bloch-Devaux, BrigitteColas, P.Emery, S.Kozanecki, W.Lancon, E.Lemaire, M.C.Locci, E.Perez, P.Rander, J.Renardy, J.F.Roussarie, A.Schuller, J.P.Schwindling, J.Trabelsi, A.Vallage, B.Black, S.N.Dann, J.H.Johnson, R.P.Kim, H.Y.Konstantinidis, N.Litke, A.M.McNeil, M.A.Taylor, G.Booth, C.N.Cartwright, S.Combley, F.Kelly, M.S.Lehto, M.Thompson, L.F.Affholderbach, K.Boehrer, ArminBrandt, S.Grupen, C.Hess, J.Koob, C.Misiejuk, A.Prange, G.Sieler, U.Giannini, G.Gobbo, B.Rothberg, J.Wasserbaech, S.Armstrong, S.R.Elmer, P.Ferguson, D.P.S.Gao, Y.Gonzalez, S.Hayes, O.J.Hu, H.Jin, S.McNamara, P.A., IIINielsen, J.Orejudos, W.Pan, Y.B.Saadi, Y.Scott, I.J.Walsh, J.Wu, Sau LanWu, X.Zobernig, G.Study of Charm Production in Z DecaysParticle Physics - ExperimentThe production rates of D*+-, Ds*+-, D+-, D0 / D0bar, Ds+, and Lambda_c in Z to ccbar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+- is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D*+ is found to be f(c to D*+) = 0.233 +- 0.010 (stat.) +- 0.011 (syst.). The average fraction of the beam energy carried by D*+- mesons in Z to cc events is measured to be < X_E (D*+-) >_cc = 0.4878 +- 0.0046 (stat.) +- 0.0061 (syst.). The D*+- energy and the hemisphere mass imbalance distributions are simultaneously used to measure the fraction of hadronic Z decays in which a gluon splits to a cc pair: n_{gluon to cc} = (3.23 +- 0.48 (stat.) +- 0.53 (syst.) %. The ratio of the Vector/(Vector+Pseudoscalar) production rates in charmed mesons is found to be P_V = 0.595 +- 0.045. The fractional decay width of the Z into cc pairs is determined from the sum of the production rates for various weakly decaying charmed states to be Rc = 0.1738 +- 0.0047 (stat.) +- 0.0116 (syst.).The production rates of D*+-, Ds*+-, D+-, D0 / D0bar, Ds+, and Lambda_c in Z to ccbar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+- is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D*+ is found to be f(c to D*+) = 0.233 +- 0.010 (stat.) +- 0.011 (syst.). The average fraction of the beam energy carried by D*+- mesons in Z to cc events is measured to be < X_E (D*+-) >_cc = 0.4878 +- 0.0046 (stat.) +- 0.0061 (syst.). The D*+- energy and the hemisphere mass imbalance distributions are simultaneously used to measure the fraction of hadronic Z decays in which a gluon splits to a cc pair: n_{gluon to cc} = (3.23 +- 0.48 (stat.) +- 0.53 (syst.) %. The ratio of the Vector/(Vector+Pseudoscalar) production rates in charmed mesons is found to be P_V = 0.595 +- 0.045. The fractional decay width of the Z into cc pairs is determined from the sum of the production rates for various weakly decaying charmed states to be Rc = 0.1738 +- 0.0047 (stat.) +- 0.0116 (syst.).hep-ex/9909032CERN-EP-99-094CERN-ALEPH-99-079CERN-EP-99-094oai:cds.cern.ch:3999931999-07-08
spellingShingle Particle Physics - Experiment
Barate, R.
Decamp, D.
Ghez, Philippe
Goy, C.
Lees, J.P.
Merle, E.
Minard, M.N.
Pietrzyk, B.
Alemany, R.
Casado, M.P.
Chmeissani, M.
Crespo, J.M.
Fernandez, E.
Fernandez-Bosman, M.
Garrido, L.
Grauges, E.
Juste, A.
Martinez, M.
Merino, G.
Miquel, R.
Mir, L.M.
Pacheco, A.
Park, I.C.
Riu, I.
Colaleo, A.
Creanza, D.
De Palma, M.
Iaselli, G.
Maggi, G.
Maggi, M.
Nuzzo, S.
Ranieri, A.
Raso, G.
Ruggieri, F.
Selvaggi, G.
Silvestris, L.
Tempesta, P.
Tricomi, A.
Zito, G.
Huang, X.
Lin, J.
Ouyang, Q.
Wang, T.
Xie, Y.
Xu, R.
Xue, S.
Zhang, J.
Zhang, L.
Zhao, W.
Abbaneo, D.
Becker, U.
Boix, G.
Cattaneo, M.
Cerutti, F.
Ciulli, V.
Dissertori, G.
Drevermann, H.
Forty, R.W.
Frank, M.
Greening, T.C.
Halley, A.W.
Hansen, J.B.
Harvey, John
Janot, P.
Jost, B.
Lehraus, I.
Leroy, O.
Mato, P.
Minten, A.
Moutoussi, A.
Ranjard, F.
Rolandi, Gigi
Schlatter, D.
Schmitt, M.
Schneider, O.
Spagnolo, P.
Tejessy, W.
Teubert, F.
Tomalin, I.R.
Tournefier, E.
Wright, A.E.
Ajaltouni, Z.
Badaud, F.
Chazelle, G.
Deschamps, O.
Falvard, A.
Ferdi, C.
Gay, P.
Guicheney, C.
Henrard, P.
Jousset, J.
Michel, B.
Monteil, S.
Montret, J.C.
Pallin, D.
Perret, P.
Podlyski, F.
Hansen, J.D.
Hansen, J.R.
Hansen, P.H.
Nilsson, B.S.
Rensch, B.
Waananen, A.
Daskalakis, G.
Kyriakis, A.
Markou, C.
Simopoulou, E.
Siotis, I.
Vayaki, A.
Blondel, A.
Bonneaud, G.
Brient, J.C.
Rouge, A.
Rumpf, M.
Swynghedauw, M.
Verderi, M.
Videau, H.
Focardi, E.
Parrini, G.
Zachariadou, K.
Cavanaugh, R.
Corden, M.
Georgiopoulos, C.
Antonelli, A.
Bencivenni, G.
Bologna, G.
Bossi, F.
Campana, P.
Capon, G.
Chiarella, V.
Laurelli, P.
Mannocchi, G.
Murtas, F.
Murtas, G.P.
Passalacqua, L.
Pepe-Altarelli, M.
Curtis, L.
Lynch, J.G.
Negus, P.
O'Shea, V.
Raine, C.
Teixeira-Dias, P.
Thompson, A.S.
Buchmuller, O.
Dhamotharan, S.
Geweniger, C.
Graefe, G.
Hanke, P.
Hansper, G.
Hepp, V.
Kluge, E.E.
Putzer, A.
Sommer, J.
Tittel, K.
Werner, S.
Wunsch, M.
Beuselinck, R.
Binnie, D.M.
Cameron, W.
Dornan, P.J.
Girone, M.
Goodsir, S.
Martin, E.B.
Marinelli, N.
Sciaba, A.
Sedgbeer, J.K.
Thomson, Evelyn J.
Williams, M.D.
Ghete, V.M.
Girtler, P.
Kneringer, E.
Kuhn, D.
Rudolph, G.
Bowdery, C.K.
Buck, P.G.
Finch, A.J.
Foster, F.
Hughes, G.
Jones, R.W.L.
Robertson, N.A.
Williams, M.I.
Giehl, I.
Jakobs, K.
Kleinknecht, K.
Quast, G.
Renk, B.
Rohne, E.
Sander, H.G.
Wachsmuth, H.
Zeitnitz, C.
Aubert, J.J.
Benchouk, C.
Bonissent, A.
Carr, J.
Coyle, P.
Etienne, F.
Motsch, F.
Payre, P.
Rousseau, D.
Talby, M.
Thulasidas, M.
Aleppo, M.
Antonelli, M.
Ragusa, F.
Buescher, Volker
Dietl, H.
Ganis, G.
Huttmann, K.
Lutjens, G.
Mannert, C.
Manner, W.
Moser, H.G.
Schael, S.
Settles, R.
Seywerd, H.
Stenzel, H.
Wiedenmann, W.
Wolf, G.
Azzurri, P.
Boucrot, J.
Callot, O.
Chen, S.
Cordier, A.
Davier, M.
Duflot, L.
Grivaz, J.F.
Heusse, P.
Jacholkowska, A.
Le Diberder, F.
Lefrancois, J.
Lutz, A.M.
Schune, M.H.
Veillet, J.J.
Videau, I.
Zerwas, D.
Bagliesi, Giuseppe
Bettarini, S.
Boccali, T.
Bozzi, C.
Calderini, G.
Dell'Orso, R.
Ferrante, I.
Foa, L.
Giassi, A.
Gregorio, A.
Ligabue, F.
Lusiani, A.
Marrocchesi, P.S.
Messineo, A.
Palla, F.
Rizzo, G.
Sanguinetti, G.
Sguazzoni, G.
Tenchini, R.
Vannini, C.
Venturi, A.
Verdini, P.G.
Blair, G.A.
Cowan, G.
Green, M.G.
Medcalf, T.
Strong, J.A.
von Wimmersperg-Toeller, J.H.
Botterill, D.R.
Clifft, R.W.
Edgecock, T.R.
Norton, P.R.
Thompson, J.C.
Bloch-Devaux, Brigitte
Colas, P.
Emery, S.
Kozanecki, W.
Lancon, E.
Lemaire, M.C.
Locci, E.
Perez, P.
Rander, J.
Renardy, J.F.
Roussarie, A.
Schuller, J.P.
Schwindling, J.
Trabelsi, A.
Vallage, B.
Black, S.N.
Dann, J.H.
Johnson, R.P.
Kim, H.Y.
Konstantinidis, N.
Litke, A.M.
McNeil, M.A.
Taylor, G.
Booth, C.N.
Cartwright, S.
Combley, F.
Kelly, M.S.
Lehto, M.
Thompson, L.F.
Affholderbach, K.
Boehrer, Armin
Brandt, S.
Grupen, C.
Hess, J.
Koob, C.
Misiejuk, A.
Prange, G.
Sieler, U.
Giannini, G.
Gobbo, B.
Rothberg, J.
Wasserbaech, S.
Armstrong, S.R.
Elmer, P.
Ferguson, D.P.S.
Gao, Y.
Gonzalez, S.
Hayes, O.J.
Hu, H.
Jin, S.
McNamara, P.A., III
Nielsen, J.
Orejudos, W.
Pan, Y.B.
Saadi, Y.
Scott, I.J.
Walsh, J.
Wu, Sau Lan
Wu, X.
Zobernig, G.
Study of Charm Production in Z Decays
title Study of Charm Production in Z Decays
title_full Study of Charm Production in Z Decays
title_fullStr Study of Charm Production in Z Decays
title_full_unstemmed Study of Charm Production in Z Decays
title_short Study of Charm Production in Z Decays
title_sort study of charm production in z decays
topic Particle Physics - Experiment
url https://dx.doi.org/10.1007/s100520000421
http://cds.cern.ch/record/399993
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AT rudolphg studyofcharmproductioninzdecays
AT bowderyck studyofcharmproductioninzdecays
AT buckpg studyofcharmproductioninzdecays
AT finchaj studyofcharmproductioninzdecays
AT fosterf studyofcharmproductioninzdecays
AT hughesg studyofcharmproductioninzdecays
AT jonesrwl studyofcharmproductioninzdecays
AT robertsonna studyofcharmproductioninzdecays
AT williamsmi studyofcharmproductioninzdecays
AT giehli studyofcharmproductioninzdecays
AT jakobsk studyofcharmproductioninzdecays
AT kleinknechtk studyofcharmproductioninzdecays
AT quastg studyofcharmproductioninzdecays
AT renkb studyofcharmproductioninzdecays
AT rohnee studyofcharmproductioninzdecays
AT sanderhg studyofcharmproductioninzdecays
AT wachsmuthh studyofcharmproductioninzdecays
AT zeitnitzc studyofcharmproductioninzdecays
AT aubertjj studyofcharmproductioninzdecays
AT benchoukc studyofcharmproductioninzdecays
AT bonissenta studyofcharmproductioninzdecays
AT carrj studyofcharmproductioninzdecays
AT coylep studyofcharmproductioninzdecays
AT etiennef studyofcharmproductioninzdecays
AT motschf studyofcharmproductioninzdecays
AT payrep studyofcharmproductioninzdecays
AT rousseaud studyofcharmproductioninzdecays
AT talbym studyofcharmproductioninzdecays
AT thulasidasm studyofcharmproductioninzdecays
AT aleppom studyofcharmproductioninzdecays
AT antonellim studyofcharmproductioninzdecays
AT ragusaf studyofcharmproductioninzdecays
AT bueschervolker studyofcharmproductioninzdecays
AT dietlh studyofcharmproductioninzdecays
AT ganisg studyofcharmproductioninzdecays
AT huttmannk studyofcharmproductioninzdecays
AT lutjensg studyofcharmproductioninzdecays
AT mannertc studyofcharmproductioninzdecays
AT mannerw studyofcharmproductioninzdecays
AT moserhg studyofcharmproductioninzdecays
AT schaels studyofcharmproductioninzdecays
AT settlesr studyofcharmproductioninzdecays
AT seywerdh studyofcharmproductioninzdecays
AT stenzelh studyofcharmproductioninzdecays
AT wiedenmannw studyofcharmproductioninzdecays
AT wolfg studyofcharmproductioninzdecays
AT azzurrip studyofcharmproductioninzdecays
AT boucrotj studyofcharmproductioninzdecays
AT calloto studyofcharmproductioninzdecays
AT chens studyofcharmproductioninzdecays
AT cordiera studyofcharmproductioninzdecays
AT davierm studyofcharmproductioninzdecays
AT duflotl studyofcharmproductioninzdecays
AT grivazjf studyofcharmproductioninzdecays
AT heussep studyofcharmproductioninzdecays
AT jacholkowskaa studyofcharmproductioninzdecays
AT lediberderf studyofcharmproductioninzdecays
AT lefrancoisj studyofcharmproductioninzdecays
AT lutzam studyofcharmproductioninzdecays
AT schunemh studyofcharmproductioninzdecays
AT veilletjj studyofcharmproductioninzdecays
AT videaui studyofcharmproductioninzdecays
AT zerwasd studyofcharmproductioninzdecays
AT bagliesigiuseppe studyofcharmproductioninzdecays
AT bettarinis studyofcharmproductioninzdecays
AT boccalit studyofcharmproductioninzdecays
AT bozzic studyofcharmproductioninzdecays
AT calderinig studyofcharmproductioninzdecays
AT dellorsor studyofcharmproductioninzdecays
AT ferrantei studyofcharmproductioninzdecays
AT foal studyofcharmproductioninzdecays
AT giassia studyofcharmproductioninzdecays
AT gregorioa studyofcharmproductioninzdecays
AT ligabuef studyofcharmproductioninzdecays
AT lusiania studyofcharmproductioninzdecays
AT marrocchesips studyofcharmproductioninzdecays
AT messineoa studyofcharmproductioninzdecays
AT pallaf studyofcharmproductioninzdecays
AT rizzog studyofcharmproductioninzdecays
AT sanguinettig studyofcharmproductioninzdecays
AT sguazzonig studyofcharmproductioninzdecays
AT tenchinir studyofcharmproductioninzdecays
AT vanninic studyofcharmproductioninzdecays
AT venturia studyofcharmproductioninzdecays
AT verdinipg studyofcharmproductioninzdecays
AT blairga studyofcharmproductioninzdecays
AT cowang studyofcharmproductioninzdecays
AT greenmg studyofcharmproductioninzdecays
AT medcalft studyofcharmproductioninzdecays
AT strongja studyofcharmproductioninzdecays
AT vonwimmerspergtoellerjh studyofcharmproductioninzdecays
AT botterilldr studyofcharmproductioninzdecays
AT clifftrw studyofcharmproductioninzdecays
AT edgecocktr studyofcharmproductioninzdecays
AT nortonpr studyofcharmproductioninzdecays
AT thompsonjc studyofcharmproductioninzdecays
AT blochdevauxbrigitte studyofcharmproductioninzdecays
AT colasp studyofcharmproductioninzdecays
AT emerys studyofcharmproductioninzdecays
AT kozaneckiw studyofcharmproductioninzdecays
AT lancone studyofcharmproductioninzdecays
AT lemairemc studyofcharmproductioninzdecays
AT loccie studyofcharmproductioninzdecays
AT perezp studyofcharmproductioninzdecays
AT randerj studyofcharmproductioninzdecays
AT renardyjf studyofcharmproductioninzdecays
AT roussariea studyofcharmproductioninzdecays
AT schullerjp studyofcharmproductioninzdecays
AT schwindlingj studyofcharmproductioninzdecays
AT trabelsia studyofcharmproductioninzdecays
AT vallageb studyofcharmproductioninzdecays
AT blacksn studyofcharmproductioninzdecays
AT dannjh studyofcharmproductioninzdecays
AT johnsonrp studyofcharmproductioninzdecays
AT kimhy studyofcharmproductioninzdecays
AT konstantinidisn studyofcharmproductioninzdecays
AT litkeam studyofcharmproductioninzdecays
AT mcneilma studyofcharmproductioninzdecays
AT taylorg studyofcharmproductioninzdecays
AT boothcn studyofcharmproductioninzdecays
AT cartwrights studyofcharmproductioninzdecays
AT combleyf studyofcharmproductioninzdecays
AT kellyms studyofcharmproductioninzdecays
AT lehtom studyofcharmproductioninzdecays
AT thompsonlf studyofcharmproductioninzdecays
AT affholderbachk studyofcharmproductioninzdecays
AT boehrerarmin studyofcharmproductioninzdecays
AT brandts studyofcharmproductioninzdecays
AT grupenc studyofcharmproductioninzdecays
AT hessj studyofcharmproductioninzdecays
AT koobc studyofcharmproductioninzdecays
AT misiejuka studyofcharmproductioninzdecays
AT prangeg studyofcharmproductioninzdecays
AT sieleru studyofcharmproductioninzdecays
AT gianninig studyofcharmproductioninzdecays
AT gobbob studyofcharmproductioninzdecays
AT rothbergj studyofcharmproductioninzdecays
AT wasserbaechs studyofcharmproductioninzdecays
AT armstrongsr studyofcharmproductioninzdecays
AT elmerp studyofcharmproductioninzdecays
AT fergusondps studyofcharmproductioninzdecays
AT gaoy studyofcharmproductioninzdecays
AT gonzalezs studyofcharmproductioninzdecays
AT hayesoj studyofcharmproductioninzdecays
AT huh studyofcharmproductioninzdecays
AT jins studyofcharmproductioninzdecays
AT mcnamarapaiii studyofcharmproductioninzdecays
AT nielsenj studyofcharmproductioninzdecays
AT orejudosw studyofcharmproductioninzdecays
AT panyb studyofcharmproductioninzdecays
AT saadiy studyofcharmproductioninzdecays
AT scottij studyofcharmproductioninzdecays
AT walshj studyofcharmproductioninzdecays
AT wusaulan studyofcharmproductioninzdecays
AT wux studyofcharmproductioninzdecays
AT zobernigg studyofcharmproductioninzdecays

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