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QCD Studies and Determination of $\alpha_s$ in $e^+ e^-$ collisions at $\sqrt{s}$ = 161 GeV and 172 GeV

We present a study of the structure of hadronic events recorded by the L3 detector at LEP at the center of mass energies of 161 and 172 GeV. The data sample corresponds to an integrated luminosity of 21.25 pb-1 collected during the high energy runs of 1996. The distributions of event shape variables...

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Detalles Bibliográficos
Autores principales: Acciarri, M, Adriani, O, Aguilar-Benítez, M, Ahlen, S P, Alcaraz, J, Alemanni, G, Allaby, James V, Aloisio, A, Alverson, G, Alviggi, M G, Ambrosi, G, Anderhub, H, Andreev, V P, Angelescu, T, Anselmo, F, Arefev, A, Azemoon, T, Aziz, T, Bagnaia, P, Baksay, L, Banerjee, S, Banerjee, Sw, Banicz, K, Barczyk, A, Barillère, R, Barone, L, Bartalini, P, Baschirotto, A, 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, Bilei, G M, Blaising, J J, Blyth, S C, Bobbink, Gerjan J, Böck, R K, Böhm, A, Boldizsar, L, Borgia, B, Bourilkov, D, Bourquin, Maurice, Braccini, S, Branson, J G, Brigljevic, V, Brock, I C, Buffini, A, Buijs, A, Burger, J D, Burger, W J, Busenitz, J K, Button, A M, Cai, X D, Campanelli, M, Capell, M, Cara Romeo, G, Carlino, G, Cartacci, A M, Casaus, J, Castellini, G, Cavallari, F, Cavallo, N, Cecchi, C, Cerrada-Canales, M, Cesaroni, F, Chamizo-Llatas, M, Chang, Y H, Chaturvedi, U K, Chekanov, S V, Chemarin, M, Chen, A, Chen, G, Chen, G M, Chen, H F, Chen, H S, Chéreau, X J, Chiefari, G, Chien, C Y, Cifarelli, Luisa, Cindolo, F, Civinini, C, Clare, I, Clare, R, Cohn, H O, Coignet, G, Colijn, A P, Colino, N, Commichau, V, Costantini, S, Cotorobai, F, de la Cruz, B, Csilling, Akos, Dai, T S, D'Alessandro, R, De Asmundis, R, Degré, A, Deiters, K, Della Volpe, D, Denes, P, De Notaristefani, F, DiBitonto, Daryl, Diemoz, M, Van Dierendonck, D N, Di Lodovico, F, Dionisi, C, Dittmar, Michael, Dominguez, A, Doria, A, Dova, M T, Duchesneau, D, Duinker, P, Durán, I, Dutta, S, Easo, S, Efremenko, Yu V, El-Mamouni, H, Engler, A, Eppling, F J, Erné, F C, Ernenwein, J P, Extermann, Pierre, Fabre, M, Faccini, R, Falciano, S, Favara, A, Fay, J, Fedin, O, Felcini, Marta, Fenyi, B, Ferguson, T, Ferroni, F, Fesefeldt, H S, Fiandrini, E, Field, J H, Filthaut, Frank, Fisher, P H, Fisk, I, Forconi, G, Fredj, L, Freudenreich, Klaus, Furetta, C, Galaktionov, Yu, Ganguli, S N, García-Abia, P, Gau, S S, Gentile, S, Gheordanescu, N, Giagu, S, Goldfarb, S, Goldstein, J, Gong, Z F, Gougas, Andreas, Gratta, Giorgio, Grünewald, M W, Gupta, V K, Gurtu, A, Gutay, L J, Hartmann, B, Hasan, A, Hatzifotiadou, D, Hebbeker, T, Hervé, A, Van Hoek, W C, Hofer, H, Hong, S J, Hoorani, H, Hou, S R, Hu, G, Innocente, Vincenzo, Jenkes, K, Jin, B N, Jones, L W, de Jong, P, Josa-Mutuberria, I, Kasser, A, Khan, R A, Kamrad, D, Kamyshkov, Yu A, Kapustinsky, J S, Karyotakis, Yu, Kaur, M, Kienzle-Focacci, M N, Kim, D, Kim, D H, Kim, J K, Kim, S C, Kim, Y G, Kinnison, W W, Kirkby, A, Kirkby, D, Kirkby, Jasper, Kiss, D, Kittel, E W, Klimentov, A, König, A C, Kopp, A, Korolko, I, Koutsenko, V F, Krämer, R W, Krenz, W, Kunin, A, Ladrón de Guevara, P, Laktineh, I, Landi, G, Lapoint, C, Lassila-Perini, K M, Laurikainen, P, Lebeau, M, Lebedev, A, Lebrun, P, Lecomte, P, Lecoq, P, Le Coultre, P, Le Goff, J M, Leiste, R, Leonardi, E, Levchenko, P M, Li Chuan, Lin, C H, Lin, W T, Linde, Frank L, Lista, L, Liu, Z A, Lohmann, W, Longo, E, Lu, W, Lü, Y S, Lübelsmeyer, K, Luci, C, Luckey, D, Luminari, L, Lustermann, W, Ma Wen Gan, Maity, M, Majumder, G, Malgeri, L, Malinin, A, Maña, C, Mangeol, D J J, Mangla, S, Marchesini, P A, Marin, A, Martin, J P, Marzano, F, Massaro, G G G, McNally, D, McNeil, R R, Mele, S, Merola, L, Meschini, M, Metzger, W J, Von der Mey, M, Mi, Y, Mihul, A, Van Mil, A J W, Mirabelli, G, Mnich, J, Molnár, P, Monteleoni, B, Moore, R, Morganti, S, Moulik, T, Mount, R, Müller, S, Muheim, F, Muijs, A J M, Nahn, S, Napolitano, M, Nessi-Tedaldi, F, Newman, H, Niessen, T, Nippe, A, Nisati, A, Nowak, H, Oh, Yu D, Opitz, H, 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, T, Pauluzzi, M, Paus, C, Pauss, Felicitas, Peach, D, Pei, Y J, Pensotti, S, Perret-Gallix, D, Petersen, B, Petrak, S, Pevsner, A, Piccolo, D, Pieri, M, Pinto, J C, Piroué, P A, Pistolesi, E, Plyaskin, V, Pohl, M, Pozhidaev, V, Postema, H, Produit, N, Prokofev, D, Prokofiev, D O, Rahal-Callot, G, Raja, N, Rancoita, P G, Rattaggi, M, Raven, G, Razis, P A, Read, K, Ren, D, Rescigno, M, Reucroft, S, Van Rhee, T, Riemann, S, Riles, K, Robohm, A, Rodin, J, Roe, B P, Romero, L, Rosier-Lees, S, Rosselet, P, Van Rossum, W, Roth, S, Rubio, Juan Antonio, Ruschmeier, D, Rykaczewski, H, Salicio, J, Sánchez, E, Sanders, M P, Sarakinos, M E, Sarkar, S, Sassowsky, M, Schäfer, C, Shchegelskii, V, Schmidt-Kärst, S, Schmitz, D, Schmitz, P, Scholz, N, Schopper, Herwig Franz, Schotanus, D J, Schwenke, J, Schwering, G, Sciacca, C, Sciarrino, D, Servoli, L, Shevchenko, S, Shivarov, N, Shoutko, V, Shukla, J, Shumilov, E, Shvorob, A V, Siedenburg, T, Son, D, Sopczak, André, Smith, B, Spillantini, P, Steuer, M, Stickland, D P, Stone, A, Stone, H, Stoyanov, B, Strässner, A, Strauch, K, Sudhakar, K, Sultanov, G G, Sun, L Z, Susinno, G F, Suter, H, Swain, J D, Tang, X W, Tauscher, Ludwig, Taylor, L, Ting, Samuel C C, Ting, S M, Tonutti, M, Tonwar, S C, Tóth, J, Tully, C, Tuchscherer, H, Tung, K L, Uchida, Y, Ulbricht, J, Uwer, U, Valente, E, Van de Walle, R T, Vesztergombi, G, Vetlitskii, I, Viertel, Gert M, Vivargent, M, Völkert, R, Vogel, H, Vogt, H, Vorobev, I, Vorobyov, A A, Vorvolakos, A, Wadhwa, M, Wallraff, W, Wang, J C, Wang, X L, Wang, Z M, Weber, A, Wittgenstein, F, Wu, S X, Wynhoff, S, Xu, J, Xu, Z Z, Yang, B Z, Yang, C G, Yao, X Y, Ye, J B, Yeh, S C, You, J M, Zalite, A, Zalite, Yu, Zemp, P, Zeng, Y, Zhang, Z, Zhang, Z P, Zhou, B, Zhu, G Y, Zhu, R Y, Zichichi, Antonino, Ziegler, F
Lenguaje:eng
Publicado: 1997
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(97)00647-3
http://cds.cern.ch/record/326441
Descripción
Sumario:We present a study of the structure of hadronic events recorded by the L3 detector at LEP at the center of mass energies of 161 and 172 GeV. The data sample corresponds to an integrated luminosity of 21.25 pb-1 collected during the high energy runs of 1996. The distributions of event shape variables and the energy dependence of their mean values are well reproduced by QCD models. From a comparison of the data with resummed second order QCD calculations, we determine the strong coupling constant at the two energies. Combining with our earlier measurements we find that the strong coupling constant decreases with increasing energy as expected in QCD.