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Measurement of the Ratio Gamma_b(b)bar/Gamma_had Using Event Shape Variables
Authors :
BUSKULIC D DEBONIS I DECAMP D GHEZ P GOY C LEES JP MINARD MN PIETRZYK B ARIZTIZABAL F COMAS P CRESPO JM DELFINO M EFTHYMIOPOULOS I FERNANDEZ E FERNANDEZBOSMAN M GAITAN V GARRIDO L MATTISON T PACHECO A PADILLA C PASCUAL A CREANZA D DEPALMA M FARILLA A IASELLI G MAGGI G NATALI S NUZZO S QUATTROMINI M RANIERI A RASO G ROMANO F RUGGIERI F SELVAGGI G SILVESTRIS L TEMPESTA P ZITO G CHAI Y HU H HUANG D HUANG X LIN J WANG T XIE Y XU D XU R ZHANG J ZHANG L ZHAO W BLUCHER E BONVICINI G BOUDREAU J CASPER D DREVERMANN H FORTY RW GANIS G GAY C HAGELBERG R HARVEY J HILGART J JACOBSEN R JOST B KNOBLOCH J LEHRAUS I LOHSE T MAGGI M MARKOU C MARTINEZ M MATO P MEINHARD H MINTEN A MIOTTO A MIQUEL R MOSER HG PALAZZI P PATER JR PERLAS JA PUSZTASZERI JF RANJARD F REDLINGER G ROTHBERG J RUAN T SAICH M SCHLATTER D SCHMELLING M SEFKOW F TEJESSY W TOMALIN IR VEENHOF R WACHSMUTH H WASSERBAECH S WIEDENMANN W WILDISH T WITZELING W WOTSCHACK J AJALTOUNI Z BADAUD F BARDADINOTWINOWSKA M ELFELLOUS R FALVARD A GAY P GUICHENEY C HENRARD P JOUSSET J MICHEL B MONTRET JC PALLIN D PERRET P PODLYSKI F PRORIOL J PRULHIERE F SAADI F FEARNLEY T HANSEN JB HANSEN JD HANSEN JR HANSEN PH MOLLERUD R NILSSON BS KYRIAKIS A SIMOPOULOU E SIOTIS I VAYAKI A ZACHARIADOU K BADIER J BLONDEL A BONNEAUD G BRIENT JC FOUQUE G ORTEU S ROUGE A RUMPF M TANAKA R VERDERI M VIDEAU H CANDLIN DJ PARSONS MI VEITCH E FOCARDI E MONETA L PARRINI G CORDEN M GEORGIOPOULOS C IKEDA M LEVINTHAL D ANTONELLI A BALDINI R BENCIVENNI G BOLOGNA G BOSSI F CAMPANA P CAPON G CERUTTI F CHIARELLA V DETTORREPIAZZOLI B FELICI G LAURELLI P MANNOCCHI G MURTAS F MURTAS GP PASSALACQUA L PEPEALTARELLI M PICCHI P COLRAIN P TENHAVE I LYNCH JG MAITLAND W MORTON WT RAINE C REEVES P SCARR JM SMITH K SMITH MG THOMPSON AS TURNBULL RM BRANDL B BRAUN O GEWENIGER C HANKE P HEPP V KLUGE EE MAUMARY Y PUTZER A RENSCH B STAHL A TITTEL K WUNSCH M BEUSELINCK R BINNIE DM CAMERON W CATTANEO M COLLING DJ DORNAN PJ GREENE AM HASSARD JF LIESKE NM MOUTOUSSI A NASH J PATTON S PAYNE DG PHILLIPS MJ SANMARTIN G SEDGBEER JK WRIGHT AG GIRTLER P KUHN D RUDOLPH G VOGL R BOWDERY CK BRODBECK TJ FINCH AJ FOSTER F HUGHES G JACKSON D KEEMER NR NUTTALL M PATEL A SLOAN T SNOW SW WHELAN EP KLEINKNECHT K RAAB J RENK B SANDER HG SCHMIDT H STEEG F WALTHER SM WANKE R WOLF B BENCHEIKH AM BENCHOUK C BONISSENT A CARR J COYLE P DRINKARD J ETIENNE F NICOD D PAPALEXIOU S PAYRE P ROOS L ROUSSEAU D SCHWEMLING P TALBY M ADLUNG S ASSMANN R BAUER C BLUM W BROWN D CATTANEO P DEHNING B DIETL H DYDAK F FRANK M HALLEY AW JAKOBS K LAUBER J LUTJENS G LUTZ G MANNER W RICHTER R SCHRODER J SCHWARZ AS SETTLES R SEYWERD H STIERLIN U STIEGLER U STDENIS R WOLF G ALEMANY R BOUCROT J CALLOT O CORDIER A DAVIER M DUFLOT L GRIVAZ JF HEUSSE P JAFFE DE JANOT P KIM DW LEDIBERDER F LEFRANCOIS J LUTZ AM SCHUNE MH VEILLET JJ VIDEAU I ZHANG Z ABBANEO D BAGLIESI G BATIGNANI G BOTTIGLI U BOZZI C CALDERINI G CARPINELLI M CIOCCI MA DELLORSO R FERRANTE I FIDECARO F FOA L FORTI F GIASSI A GIORGI MA GREGORIO A LUSIANI, Alberto MANNELLI EB MARROCCHESI PS MESSINEO A PALLA F RIZZO G SANGUINETTI G SPAGNOLO P STEINBERGER J TENCHINI R TONELLI G TRIGGIANI G VANNINI C VENTURI A VERDINI PG WALSH J BETTERIDGE AP GAO Y GREEN MG MARCH PV MIR LM MEDCALF T QUAZI IS STRONG JA WEST LR BOTTERILL DR CLIFFT RW EDGECOCK TR HAYWOOD S NORTON PR THOMPSON JC BLOCHDEVAUX B COLAS P DUARTE H EMERY S KOZANECKI W LANCON E LEMAIRE MC LOCCI E MARX B PEREZ P RANDER J RENARDY JF ROSOWSKY A ROUSSARIE A SCHULLER JP SCHWINDLING J MOHAND DS VALLAGE B JOHNSON RP LITKE AM TAYLOR G WEAR J ASHMAN JG BABBAGE W BOOTH CN BUTTAR C CARTWRIGHT S COMBLEY F DAWSON I THOMPSON LF BARBERIO E BOHRER A BRANDT S COWAN G GRUPEN C LUTTERS G RIVERA F SCHAFER U SMOLIK L BOSISIO L DELLAMARINA R GIANNINI G GOBBO B RAGUSA F BELLANTONI L CHEN W CONWAY JS FENG Z FERGUSON DPS GAO YS GRAHL J HARTON JL HAYES OJ NACHTMAN JM PAN YB SAADI Y SCHMITT M SCOTT I SHARMA V SHI ZH TURK JD WALSH AM WEBER FV WU SL WU X ZHENG M ZOBERNIG G. ROLANDI, LUIGI LIGABUE, FRANCO Buskulic, D Debonis, I Decamp, D Ghez, P Goy, C Lees, Jp Minard, Mn Pietrzyk, B Ariztizabal, F Comas, P Crespo, Jm Delfino, M Efthymiopoulos, I Fernandez, E Fernandezbosman, M Gaitan, V Garrido, L Mattison, T Pacheco, A Padilla, C Pascual, A Creanza, D Depalma, M Farilla, A Iaselli, G Maggi, G Natali, S Nuzzo, S Quattromini, M Ranieri, A Raso, G Romano, F Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Zito, G Chai, Y Hu, H Huang, D Huang, X Lin, J Wang, T Xie, Y Xu, D Xu, R Zhang, J Zhang, L Zhao, W Blucher, E Bonvicini, G Boudreau, J Casper, D Drevermann, H Forty, Rw Ganis, G Gay, C Hagelberg, R Harvey, J Hilgart, J Jacobsen, R Jost, B Knobloch, J Lehraus, I Lohse, T Maggi, M Markou, C Martinez, M Mato, P Meinhard, H Minten, A Miotto, A Miquel, R Moser, Hg Palazzi, P Pater, Jr Perlas, Ja Pusztaszeri, Jf Ranjard, F Redlinger, G Rolandi, Luigi Rothberg, J Ruan, T Saich, M Schlatter, D Schmelling, M Sefkow, F Tejessy, W Tomalin, Ir Veenhof, R Wachsmuth, H Wasserbaech, S Wiedenmann, W Wildish, T Witzeling, W Wotschack, J Ajaltouni, Z Badaud, F Bardadinotwinowska, M Elfellous, R Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Montret, Jc Pallin, D Perret, P Podlyski, F Proriol, J Prulhiere, F Saadi, F Fearnley, T Hansen, Jb Hansen, Jd Hansen, Jr Hansen, Ph Mollerud, R Nilsson, B Kyriakis, A Simopoulou, E Siotis, I Vayaki, A Zachariadou, K Badier, J Blondel, A Bonneaud, G Brient, Jc Fouque, G Orteu, S Rouge, A Rumpf, M Tanaka, R Verderi, M Videau, H Candlin, Dj Parsons, Mi Veitch, E Focardi, E Moneta, L Parrini, G Corden, M Georgiopoulos, C Ikeda, M Levinthal, D Antonelli, A Baldini, R Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Cerutti, F Chiarella, V Dettorrepiazzoli, B Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, Gp Passalacqua, L Pepealtarelli, M Picchi, P Colrain, P Tenhave, I Lynch, Jg Maitland, W Morton, Wt Raine, C Reeves, P Scarr, Jm Smith, K Smith, Mg Thompson, A Turnbull, Rm Brandl, B Braun, O Geweniger, C Hanke, P Hepp, V Kluge, Ee Maumary, Y Putzer, A Rensch, B Stahl, A Tittel, K Wunsch, M Beuselinck, R Binnie, Dm Cameron, W Cattaneo, M Colling, Dj Dornan, Pj Greene, Am Hassard, Jf Lieske, Nm Moutoussi, A Nash, J Patton, S Payne, Dg Phillips, Mj Sanmartin, G Sedgbeer, Jk Wright, Ag Girtler, P Kuhn, D Rudolph, G Vogl, R Bowdery, Ck Brodbeck, Tj Finch, Aj Foster, F Hughes, G Jackson, D Keemer, Nr Nuttall, M Patel, A Sloan, T Snow, Sw Whelan, Ep Kleinknecht, K Raab, J Renk, B Sander, Hg Schmidt, H Steeg, F Walther, Sm Wanke, R Wolf, B Bencheikh, Am Benchouk, C Bonissent, A Carr, J Coyle, P Drinkard, J Etienne, F Nicod, D Papalexiou, S Payre, P Roos, L Rousseau, D Schwemling, P Talby, M Adlung, S Assmann, R Bauer, C Blum, W Brown, D Cattaneo, P Dehning, B Dietl, H Dydak, F Frank, M Halley, Aw Jakobs, K Lauber, J Lutjens, G Lutz, G Manner, W Richter, R Schroder, J Schwarz, A Settles, R Seywerd, H Stierlin, U Stiegler, U Stdenis, R Wolf, G Alemany, R Boucrot, J Callot, O Cordier, A Davier, M Duflot, L Grivaz, Jf Heusse, P Jaffe, De Janot, P Kim, Dw Lediberder, F Lefrancois, J Lutz, Am Schune, Mh Veillet, Jj Videau, I Zhang, Z Abbaneo, D Bagliesi, G Batignani, G Bottigli, U Bozzi, C Calderini, G Carpinelli, M Ciocci, Ma Dellorso, R Ferrante, I Fidecaro, F Foa, L Forti, F Giassi, A Giorgi, Ma Gregorio, A Ligabue, Franco Lusiani, Alberto Mannelli, Eb Marrocchesi, P Messineo, A Palla, F Rizzo, G Sanguinetti, G Spagnolo, P Steinberger, J Tenchini, R Tonelli, G Triggiani, G Vannini, C Venturi, A Verdini, Pg Walsh, J Betteridge, Ap Gao, Y Green, Mg March, Pv Mir, Lm Medcalf, T Quazi, I Strong, Ja West, Lr Botterill, Dr Clifft, Rw Edgecock, Tr Haywood, S Norton, Pr Thompson, Jc Blochdevaux, B Colas, P Duarte, H Emery, S Kozanecki, W Lancon, E Lemaire, Mc Locci, E Marx, B Perez, P Rander, J Renardy, Jf Rosowsky, A Roussarie, A Schuller, Jp Schwindling, J Mohand, D Vallage, B Johnson, Rp Litke, Am Taylor, G Wear, J Ashman, Jg Babbage, W Booth, Cn Buttar, C Cartwright, S Combley, F Dawson, I Thompson, Lf Barberio, E Bohrer, A Brandt, S Cowan, G Grupen, C Lutters, G Rivera, F Schafer, U Smolik, L Bosisio, L Dellamarina, R Giannini, G Gobbo, B Ragusa, F Bellantoni, L Chen, W Conway, J Feng, Z Ferguson, Dp Grahl, J Harton, Jl Hayes, Oj Nachtman, Jm Pan, Yb Saadi, Y Schmitt, M Scott, I Sharma, V Shi, Zh Turk, Jd Walsh, Am Weber, Fv Wu, Sl Wu, X Zheng, M Zobernig, G.
Publication Year :
1993
Abstract
The branching fraction of Z --> bbBAR relative to all hadronic decays of the Z has been measured using event shape variables to preferentially select Z --> bbBAR events. The method chosen applies a combination of shape discriminators and the selection of high transverse momentum leptons to event hemispheres. From a sample of 440000 hadronic Z decays collected with the ALEPH detector at LEP, the ratio GAMMA(bbBAR)/GAMMA(had) = 0.228+/-0.005(stat.)+/-0.005(syst.) is measured. RI ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Ferrante, Isidoro/F-1017-2012
Details
Language :
English
Database :
OpenAIRE
Accession number :
edsair.dedup.wf.001..efcfd82286e24688aa33fc3136cc11de