The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0.15 nb-1 of integrated luminosity obtained in the 2011 LHC Pb+Pb run at ?????????sNN=2.76 TeV. The Z bosons are reconstructed via dielectron and dimuon decay channels, with a background contamination of less than 3%. Results from the two channels are consistent and are combined. Within the statistical and systematic uncertainties, the per-event Z boson yield is proportional to the number of binary collisions estimated by the Glauber model. The elliptic anisotropy of the azimuthal distribution of the Z boson with respect to the event plane is found to be consistent with zero. ?????? 2013 CERN.
Measurement of Z boson production in Pb-Pb collisions at ?????????s NN=2.76 TeV with the ATLAS detector / Aad, G., Aloisio, A., Alviggi, M., Canale, V., Cevenini, F., Chiefari, G., DELLA VOLPE, D., Merola, L., Patricelli, S., Conventi, F., DELLA PIETRA, M., Giordano, R., Musto, E., Rossi, E., SANCHEZ PINEDA, A.R., Carlino, G., de Asmundis, R., Di Donato, C., Doria, A., Iengo, P., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:22301(2013), pp. 1-18. [10.1103/PhysRevLett.110.022301]
Measurement of Z boson production in Pb-Pb collisions at ?????????s NN=2.76 TeV with the ATLAS detector
ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CANALE, VINCENZO;CHIEFARI, GIOVANNI;DELLA VOLPE, DOMENICO;MEROLA, LEONARDO;PATRICELLI, SERGIO;DELLA PIETRA, MASSIMO;GIORDANO, RAFFAELE;Rossi, Elvira;SANCHEZ PINEDA, ARTURO RODOLFO;
2013
Abstract
The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0.15 nb-1 of integrated luminosity obtained in the 2011 LHC Pb+Pb run at ?????????sNN=2.76 TeV. The Z bosons are reconstructed via dielectron and dimuon decay channels, with a background contamination of less than 3%. Results from the two channels are consistent and are combined. Within the statistical and systematic uncertainties, the per-event Z boson yield is proportional to the number of binary collisions estimated by the Glauber model. The elliptic anisotropy of the azimuthal distribution of the Z boson with respect to the event plane is found to be consistent with zero. ?????? 2013 CERN.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
