A measurement of the ??????b0 lifetime and mass in the decay channel ??????b0?????????J/??????(??????+??????-)??????0(p?????? -) is presented. The analysis uses a signal sample of about 2200 ??????b0 and ????????????b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the ??????b0 lifetime and mass. They are measured to be ????????????b=1.449??????0.036(stat) ??????0.017(syst) ps and m??????b=5619.7??????0. 7(stat)??????1.1(syst) MeV. ?????? 2013 CERN.
Measurement of the ??????b0 lifetime and mass in the ATLAS experiment / Aad, G.; Aloisio, Alberto; Alviggi, Mariagrazia; Canale, Vincenzo; Cevenini, Francesco; Chiefari, Giovanni; DELLA VOLPE, Domenico; Merola, Leonardo; Patricelli, Sergio; Conventi, Francesco; DELLA PIETRA, Massimo; Giordano, Raffaele; Musto, Elisa; Rossi, Elvira; SANCHEZ PINEDA, ARTURO RODOLFO; Carlino, Gianpaolo; de Asmundis, Riccardo; Di Donato, Camilla; Doria, Alessandra; Iengo, Paolo; Izzo, Vincenzo; Sekhniaidze, Givi; Al, e. t. .. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 87:32002(2013), pp. 1-19. [10.1103/PhysRevD.87.032002]
Measurement of the ??????b0 lifetime and mass in the ATLAS experiment
ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CANALE, VINCENZO;CEVENINI, FRANCESCO;CHIEFARI, GIOVANNI;DELLA VOLPE, DOMENICO;MEROLA, LEONARDO;PATRICELLI, SERGIO;DELLA PIETRA, MASSIMO;GIORDANO, RAFFAELE;Rossi, Elvira;SANCHEZ PINEDA, ARTURO RODOLFO;
2013
Abstract
A measurement of the ??????b0 lifetime and mass in the decay channel ??????b0?????????J/??????(??????+??????-)??????0(p?????? -) is presented. The analysis uses a signal sample of about 2200 ??????b0 and ????????????b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the ??????b0 lifetime and mass. They are measured to be ????????????b=1.449??????0.036(stat) ??????0.017(syst) ps and m??????b=5619.7??????0. 7(stat)??????1.1(syst) MeV. ?????? 2013 CERN.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
