A PRECISE MEASUREMENT OF GAMMA-Z-]B(B)BAR/GAMMA-Z-] HADRONS

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, 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; Ligabue, Franco; 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.

doi:10.1016/0370-2693(93)90028-G

A measurement of the partial width ratio GAMMA(bbBAR)/GAMMA(had) using a method which tags the Z --> bbBAR decays through the lifetime of the produced heavy hadrons is presented. This method relies on the tracking precision afforded by a double-sided silicon vertex detector. The tag algorithm makes a probabilistic interpretation of three-dimensional track impact parameters, using the data to measure the resolution. By tagging the two b hadrons separately, both GAMMA(bbBAR)/GAMMA(had) and the tag efficiency can be determined from the data. For a 26% efficiency of tagging a single b hadron within the vertex detector solid angle coverage, a purity of 96% is achieved. A value of GAMMA(bbBAR)/GAMMA(had) = 0.2192+/-0.0022(stat.)+/-0.0026(syst.)+/-0.0016(GAMMA(ccBAR)/GAMMA(had)) is found. Combining this result with other recent ALEPH GAMMA(bbBAR)/GAMMA(had) measurements gives a 95% confidence upper limit on the Standard Model top mass of M(t) < 228 GeV. 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

Titolo:	A PRECISE MEASUREMENT OF GAMMA-Z-]B(B)BAR/GAMMA-Z-] HADRONS
Autori:	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 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 LIGABUE, FRANCO 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. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1993
Rivista:	PHYSICS LETTERS. SECTION B
Abstract:	A measurement of the partial width ratio GAMMA(bbBAR)/GAMMA(had) using a method which tags the Z --> bbBAR decays through the lifetime of the produced heavy hadrons is presented. This method relies on the tracking precision afforded by a double-sided silicon vertex detector. The tag algorithm makes a probabilistic interpretation of three-dimensional track impact parameters, using the data to measure the resolution. By tagging the two b hadrons separately, both GAMMA(bbBAR)/GAMMA(had) and the tag efficiency can be determined from the data. For a 26% efficiency of tagging a single b hadron within the vertex detector solid angle coverage, a purity of 96% is achieved. A value of GAMMA(bbBAR)/GAMMA(had) = 0.2192+/-0.0022(stat.)+/-0.0026(syst.)+/-0.0016(GAMMA(ccBAR)/GAMMA(had)) is found. Combining this result with other recent ALEPH GAMMA(bbBAR)/GAMMA(had) measurements gives a 95% confidence upper limit on the Standard Model top mass of M(t) < 228 GeV. 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
Handle:	http://hdl.handle.net/11384/3323
Appare nelle tipologie:	1.1 Articolo in rivista

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