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We have studied the structure of hadronic events with a hard, isolated photon in the final state (e(+)e(-) --> Z --> hadrons + gamma) in the 3.6 million hadronic events collected with the L3 detector at centre-of-mass energies around 91 GeV. The centre-of-mass energy of the hadronic system is in the range 30 GeV to 86 GeV. Event shape variables have been measured at these reduced centre-of-mass energies and have been compared with the predictions of different QCD Monte Carlo programs. The event shape variables and the energy dependence of their mean values are well reproduced by QCD models. We fit distributions of several global event shape variables to resummed O/alpha(s)(2)/calculations to determine the strong coupling constant a, over a wide range of energies. We find that the strong coupling constant alpha(s) decreases with increasing energy, as expected from QCD. (C) 1997 Elsevier Science B.V.

Study of hadronic events and measurements of alpha(s) between 30 and 91 GeV / Acciarri, M; Adriani, O; Aguilarbenitez, M; Ahlen, S; Alcaraz, J; Alemanni, G; Allaby, J; Aloisio, A; Alverson, G; Alviggi, Mg; Ambrosi, G; Anderhub, H; Andreev, Vp; Angelescu, T; Anselmo, F; Arefiev, A; Azemoon, T; Aziz, T; Bagnaia, Paolo; Baksay, L; Ball, Rc; Banerjee, S; Banerjee, S; Banicz, K; Barczyk, A; Barillere, R; Barone, Luciano Maria; Bartalini, P; Baschirotto, A; Basile, M; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Berdugo, J; Berges, P; Bertucci, B; Betev, Bl; Bhattacharya, S; Biasini, M; Biland, A; Bilei, Gm; Blaising, Jj; Blyth, Sc; Bobbink, Gj; Bock, R; Bohm, A; Boldizsar, L; Borgia, B; Boucham, A; Bourilkov, D; Bourquin, M; Boutigny, D; Braccini, S; Branson, Jg; Brigljevic, V; Brock, Ic; Buffini, A; Buijs, A; Burger, Jd; Burger, Wj; Busenitz, J; Cai, Xd; Campanelli, M; Capell, M; Romeo, Gc; Carlino, G; Cartacci, Am; Casaus, J; Castellini, G; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Cesaroni, F; Chamizo, M; Chang, Yh; Chaturvedi, Uk; Chekanov, Sv; Chemarin, M; Chen, A; Chen, G; Chen, Gm; Chen, Hf; Chen, Hs; Chen, M; Chiefari, G; Chien, Cy; Cifarelli, L; Cindolo, F; Civinini, C; Clare, I; Clare, R; Cohn, Ho; Coignet, G; Colijn, Ap; Colino, N; Commichau, V; Costantini, S; Cotorobai, F; Delacruz, B; Csilling, A; Dai, Ts; Dalessandro, R; Deasmundis, R; Degre, A; Deiters, K; Denes, P; Denotaristefani, F; Dibitonto, D; Diemoz, M; Vandierendonck, D; Dilodovico, F; Dionisi, C; Dittmar, M; Dominguez, A; Doria, A; Dorne, I; Dova, Mt; Drago, E; Duchesneau, D; Duinker, P; Duran, I; Dutta, S; Easo, S; Efremenko, Y; Elmamouni, H; Engler, A; Eppling, Fj; Erne, Fc; Ernenwein, Jp; Extermann, P; Fabre, M; Faccini, R; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, M; Fenyi, B; Ferguson, T; Ferroni, Fernando; Fesefeldt, H; Fiandrini, E; Field, Jh; Filthaut, F; Fisher, Ph; Fisk, I; Forconi, G; Fredj, L; Freudenreich, K; Furetta, C; Galaktionov, Y; Ganguli, Sn; Garciaabia, P; Gau, Ss; Gentile, Simonetta; Gerald, J; Gheordanescu, N; Giagu, Stefano; Goldfarb, S; Goldstein, J; Gong, Zf; Gougas, A; Gratta, G; Gruenewald, Mw; Gupta, Vk; Gurtu, A; Gutay, Lj; Hartmann, B; Hasan, A; Hatzifotiadou, D; Hebbeker, T; Herve, A; Vanhoek, Wc; Hofer, H; Hong, Sj; Hoorani, H; Hou, Sr; Hu, G; Innocente, V; Janssen, H; Jenkes, K; Jin, Bn; Jones, Lw; Dejong, P; Josamutuberria, I; Kasser, A; Khan, Ra; Kamrad, D; Kamyshkov, Y; Kapustinsky, Js; Karyotakis, Y; Kaur, M; Kienzlefocacci, Mn; Kim, D; Kim, Dh; Kim, Jk; Kim, Sc; Kim, Yg; Kinnison, Ww; Kirkby, A; Kirkby, D; Kirkby, J; Kiss, D; Kittel, W; Klimentov, A; Konig, Ac; Kopp, A; Korolko, I; Koutsenko, V; Kraemer, Rw; Krenz, W; Kunin, A; Deguevara, Pl; Landi, G; Lapoint, C; Lassilaperini, K; Laurikainen, P; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Lecoultre, P; Leggett, C; Legoff, Jm; Leiste, R; Leonardi, E; Levtchenko, P; Li, C; Lin, Ch; Lin, Wt; Linde, Fl; Lista, L; Liu, Za; Lohmann, W; Longo, E; Lu, W; Lu, Ys; Lubelsmeyer, K; Luci, Claudio; Luckey, D; Luminari, L; Lustermann, W; Ma, Wg; Maity, M; Majumder, G; Malgeri, L; Malinin, A; Mana, C; Mangeol, D; Mangla, S; Marchesini, P; Marin, A; Martin, Jp; Marzano, F; Massaro, Ggg; Mcnally, D; Mele, S; Merola, L; Meschini, M; Metzger, Wj; Vondermey, M; Mi, Y; Mihul, A; Vanmil, Ajw; Mirabelli, G; Mnich, J; Molnar, P; Monteleoni, B; Moore, R; Morganti, S; Moulik, T; Mount, R; Muller, S; Muheim, F; Muijs, Ajm; Nahn, S; Napolitano, M; Nessitedaldi, F; Newman, H; Niessen, T; Nippe, A; Nisati, A; Nowak, H; Oh, Yd; Opitz, H; Organtini, Giovanni; Ostonen, R; Palomares, C; Pandoulas, D; Paoletti, S; Paolucci, P; Park, Hk; Park, Lh; Pascale, G; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, F; Peach, D; Pei, Yj; Pensotti, S; Perretgallix, D; Petersen, B; Petrak, S; Pevsner, A; Piccolo, D; Pieri, M; Pinto, Jc; Piroue, Pa; Pistolesi, E; Plyaskin, V; Pohl, M; Pojidaev, V; Postema, H; Produit, N; Prokofiev, D; Rahalcallot, G; Raja, N; Rancoita, Pg; Rattaggi, M; Raven, G; Razis, P; Read, K; Ren, D; Rescigno, M; Reucroft, S; Vanrhee, T; Riemann, S; Riles, K; Rind, O; Robohm, A; Rodin, J; Roe, Bp; Romero, L; Rosierlees, S; Rosselet, P; Vanrossum, W; Roth, S; Rubio, Ja; Ruschmeier, D; Rykaczewski, H; Salicio, J; Sanchez, E; Sanders, Mp; Sarakinos, Me; Sarkar, S; Sassowsky, M; Sauvage, G; Schafer, C; Schegelsky, V; Schmidtkaerst, S; Schmitz, D; Schmitz, P; Schneegans, M; Scholz, N; Schopper, H; Schotanus, Dj; Schwenke, J; Schwering, G; Sciacca, C; Sciarrino, D; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shukla, J; Shumilov, E; Shvorob, A; Siedenburg, T; Son, D; Sopczak, A; Soulimov, V; Smith, B; Spillantini, P; Steuer, M; Stickland, Dp; Stone, H; Stoyanov, B; Straessner, A; Strauch, K; Sudhakar, K; Sultanov, G; Sun, Lz; Susinno, Gf; Suter, H; Swain, Jd; Tang, Xw; Tauscher, L; Taylor, L; Ting, Scc; Ting, Sm; Tonutti, M; Tonwar, Sc; Toth, J; Tully, C; Tuchscherer, H; Tung, Kl; Uchida, Y; Ulbricht, J; Uwer, U; Valente, E; Vandewalle, Rt; Vesztergombi, G; Vetlitsky, I; Viertel, G; Vivargent, M; Volkert, R; Vogel, H; Vogt, H; Vorobiev, I; Vorobyov, Aa; Vorvolakos, A; Wadhwa, M; Wallraff, W; Wang, Jc; Wang, Xl; Wang, Zm; Weber, A; Wittgenstein, F; Wu, Sx; Wynhoff, S; Xu, J; Xu, Zz; Yang, Bz; Yang, Cg; Yao, Xy; Ye, Jb; Yeh, Sc; You, Jm; Zalite, A; Zalite, Y; Zemp, P; Zeng, Y; Zhang, Z; Zhang, Zp; Zhou, B; Zhou, Y; Zhu, Gy; Zhu, Ry; Zichichi, A; Ziegler, F.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 411:(1997), pp. 339-353. [10.1016/S0370-2693(97)01000-9]

Study of hadronic events and measurements of alpha(s) between 30 and 91 GeV

BAGNAIA, Paolo;BARONE, Luciano Maria;FERRONI, Fernando;GENTILE, Simonetta;GIAGU, Stefano;LUCI, Claudio;ORGANTINI, Giovanni;
1997

Abstract

We have studied the structure of hadronic events with a hard, isolated photon in the final state (e(+)e(-) --> Z --> hadrons + gamma) in the 3.6 million hadronic events collected with the L3 detector at centre-of-mass energies around 91 GeV. The centre-of-mass energy of the hadronic system is in the range 30 GeV to 86 GeV. Event shape variables have been measured at these reduced centre-of-mass energies and have been compared with the predictions of different QCD Monte Carlo programs. The event shape variables and the energy dependence of their mean values are well reproduced by QCD models. We fit distributions of several global event shape variables to resummed O/alpha(s)(2)/calculations to determine the strong coupling constant a, over a wide range of energies. We find that the strong coupling constant alpha(s) decreases with increasing energy, as expected from QCD. (C) 1997 Elsevier Science B.V.
1997
01 Pubblicazione su rivista::01a Articolo in rivista
Study of hadronic events and measurements of alpha(s) between 30 and 91 GeV / Acciarri, M; Adriani, O; Aguilarbenitez, M; Ahlen, S; Alcaraz, J; Alemanni, G; Allaby, J; Aloisio, A; Alverson, G; Alviggi, Mg; Ambrosi, G; Anderhub, H; Andreev, Vp; Angelescu, T; Anselmo, F; Arefiev, A; Azemoon, T; Aziz, T; Bagnaia, Paolo; Baksay, L; Ball, Rc; Banerjee, S; Banerjee, S; Banicz, K; Barczyk, A; Barillere, R; Barone, Luciano Maria; Bartalini, P; Baschirotto, A; Basile, M; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Berdugo, J; Berges, P; Bertucci, B; Betev, Bl; Bhattacharya, S; Biasini, M; Biland, A; Bilei, Gm; Blaising, Jj; Blyth, Sc; Bobbink, Gj; Bock, R; Bohm, A; Boldizsar, L; Borgia, B; Boucham, A; Bourilkov, D; Bourquin, M; Boutigny, D; Braccini, S; Branson, Jg; Brigljevic, V; Brock, Ic; Buffini, A; Buijs, A; Burger, Jd; Burger, Wj; Busenitz, J; Cai, Xd; Campanelli, M; Capell, M; Romeo, Gc; Carlino, G; Cartacci, Am; Casaus, J; Castellini, G; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Cesaroni, F; Chamizo, M; Chang, Yh; Chaturvedi, Uk; Chekanov, Sv; Chemarin, M; Chen, A; Chen, G; Chen, Gm; Chen, Hf; Chen, Hs; Chen, M; Chiefari, G; Chien, Cy; Cifarelli, L; Cindolo, F; Civinini, C; Clare, I; Clare, R; Cohn, Ho; Coignet, G; Colijn, Ap; Colino, N; Commichau, V; Costantini, S; Cotorobai, F; Delacruz, B; Csilling, A; Dai, Ts; Dalessandro, R; Deasmundis, R; Degre, A; Deiters, K; Denes, P; Denotaristefani, F; Dibitonto, D; Diemoz, M; Vandierendonck, D; Dilodovico, F; Dionisi, C; Dittmar, M; Dominguez, A; Doria, A; Dorne, I; Dova, Mt; Drago, E; Duchesneau, D; Duinker, P; Duran, I; Dutta, S; Easo, S; Efremenko, Y; Elmamouni, H; Engler, A; Eppling, Fj; Erne, Fc; Ernenwein, Jp; Extermann, P; Fabre, M; Faccini, R; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, M; Fenyi, B; Ferguson, T; Ferroni, Fernando; Fesefeldt, H; Fiandrini, E; Field, Jh; Filthaut, F; Fisher, Ph; Fisk, I; Forconi, G; Fredj, L; Freudenreich, K; Furetta, C; Galaktionov, Y; Ganguli, Sn; Garciaabia, P; Gau, Ss; Gentile, Simonetta; Gerald, J; Gheordanescu, N; Giagu, Stefano; Goldfarb, S; Goldstein, J; Gong, Zf; Gougas, A; Gratta, G; Gruenewald, Mw; Gupta, Vk; Gurtu, A; Gutay, Lj; Hartmann, B; Hasan, A; Hatzifotiadou, D; Hebbeker, T; Herve, A; Vanhoek, Wc; Hofer, H; Hong, Sj; Hoorani, H; Hou, Sr; Hu, G; Innocente, V; Janssen, H; Jenkes, K; Jin, Bn; Jones, Lw; Dejong, P; Josamutuberria, I; Kasser, A; Khan, Ra; Kamrad, D; Kamyshkov, Y; Kapustinsky, Js; Karyotakis, Y; Kaur, M; Kienzlefocacci, Mn; Kim, D; Kim, Dh; Kim, Jk; Kim, Sc; Kim, Yg; Kinnison, Ww; Kirkby, A; Kirkby, D; Kirkby, J; Kiss, D; Kittel, W; Klimentov, A; Konig, Ac; Kopp, A; Korolko, I; Koutsenko, V; Kraemer, Rw; Krenz, W; Kunin, A; Deguevara, Pl; Landi, G; Lapoint, C; Lassilaperini, K; Laurikainen, P; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Lecoultre, P; Leggett, C; Legoff, Jm; Leiste, R; Leonardi, E; Levtchenko, P; Li, C; Lin, Ch; Lin, Wt; Linde, Fl; Lista, L; Liu, Za; Lohmann, W; Longo, E; Lu, W; Lu, Ys; Lubelsmeyer, K; Luci, Claudio; Luckey, D; Luminari, L; Lustermann, W; Ma, Wg; Maity, M; Majumder, G; Malgeri, L; Malinin, A; Mana, C; Mangeol, D; Mangla, S; Marchesini, P; Marin, A; Martin, Jp; Marzano, F; Massaro, Ggg; Mcnally, D; Mele, S; Merola, L; Meschini, M; Metzger, Wj; Vondermey, M; Mi, Y; Mihul, A; Vanmil, Ajw; Mirabelli, G; Mnich, J; Molnar, P; Monteleoni, B; Moore, R; Morganti, S; Moulik, T; Mount, R; Muller, S; Muheim, F; Muijs, Ajm; Nahn, S; Napolitano, M; Nessitedaldi, F; Newman, H; Niessen, T; Nippe, A; Nisati, A; Nowak, H; Oh, Yd; Opitz, H; Organtini, Giovanni; Ostonen, R; Palomares, C; Pandoulas, D; Paoletti, S; Paolucci, P; Park, Hk; Park, Lh; Pascale, G; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, F; Peach, D; Pei, Yj; Pensotti, S; Perretgallix, D; Petersen, B; Petrak, S; Pevsner, A; Piccolo, D; Pieri, M; Pinto, Jc; Piroue, Pa; Pistolesi, E; Plyaskin, V; Pohl, M; Pojidaev, V; Postema, H; Produit, N; Prokofiev, D; Rahalcallot, G; Raja, N; Rancoita, Pg; Rattaggi, M; Raven, G; Razis, P; Read, K; Ren, D; Rescigno, M; Reucroft, S; Vanrhee, T; Riemann, S; Riles, K; Rind, O; Robohm, A; Rodin, J; Roe, Bp; Romero, L; Rosierlees, S; Rosselet, P; Vanrossum, W; Roth, S; Rubio, Ja; Ruschmeier, D; Rykaczewski, H; Salicio, J; Sanchez, E; Sanders, Mp; Sarakinos, Me; Sarkar, S; Sassowsky, M; Sauvage, G; Schafer, C; Schegelsky, V; Schmidtkaerst, S; Schmitz, D; Schmitz, P; Schneegans, M; Scholz, N; Schopper, H; Schotanus, Dj; Schwenke, J; Schwering, G; Sciacca, C; Sciarrino, D; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shukla, J; Shumilov, E; Shvorob, A; Siedenburg, T; Son, D; Sopczak, A; Soulimov, V; Smith, B; Spillantini, P; Steuer, M; Stickland, Dp; Stone, H; Stoyanov, B; Straessner, A; Strauch, K; Sudhakar, K; Sultanov, G; Sun, Lz; Susinno, Gf; Suter, H; Swain, Jd; Tang, Xw; Tauscher, L; Taylor, L; Ting, Scc; Ting, Sm; Tonutti, M; Tonwar, Sc; Toth, J; Tully, C; Tuchscherer, H; Tung, Kl; Uchida, Y; Ulbricht, J; Uwer, U; Valente, E; Vandewalle, Rt; Vesztergombi, G; Vetlitsky, I; Viertel, G; Vivargent, M; Volkert, R; Vogel, H; Vogt, H; Vorobiev, I; Vorobyov, Aa; Vorvolakos, A; Wadhwa, M; Wallraff, W; Wang, Jc; Wang, Xl; Wang, Zm; Weber, A; Wittgenstein, F; Wu, Sx; Wynhoff, S; Xu, J; Xu, Zz; Yang, Bz; Yang, Cg; Yao, Xy; Ye, Jb; Yeh, Sc; You, Jm; Zalite, A; Zalite, Y; Zemp, P; Zeng, Y; Zhang, Z; Zhang, Zp; Zhou, B; Zhou, Y; Zhu, Gy; Zhu, Ry; Zichichi, A; Ziegler, F.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 411:(1997), pp. 339-353. [10.1016/S0370-2693(97)01000-9]
01a Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/241734
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