A search for Z bosons in the muon+muon- decay channel has been performed in PbPb collisions at sqrt(sNN) = 2:76 TeV with the CMS detector at the LHC, in a 7.2 microbarn^-1 data sample. The number of opposite-sign muon pairs observed in the 60–120 GeV/c^2 invariant mass range is 39, corresponding to a yield per unit of rapidity (y) and per minimum bias event of [33.8 +- 5.5 (stat) +- 4.4 (syst)] x10^-8, in the |y| < 2.0 range. Rapidity, transverse momentum, and centrality dependencies are also measured. The results agree with next-to-leading order QCD calculations, scaled by the number of incoherent nucleon-nucleon collisions.

S. CHATRCHYAN, V. KHACHATRYAN, A.M. SIRUNYAN, A. TUMASYAN, W. ADAM, T. BERGAUER, et al. (2011). Study of Z boson production in PbPb collisions at sqrt(sNN)=2.76 TeV. PHYSICAL REVIEW LETTERS, 106, 212301-1-212301-14 [10.1103/PhysRevLett.106.212301].

Study of Z boson production in PbPb collisions at sqrt(sNN)=2.76 TeV

BONACORSI, DANIELE;BRAIBANT, SYLVIE;CAPILUPPI, PAOLO;CASTRO, ANDREA;CUFFIANI, MARCO;FANFANI, ALESSANDRA;FASANELLA, DANIELE;MENEGHELLI, MARCO;NAVARRIA, FRANCESCO LUIGI;PRIMAVERA, FEDERICA;ROSSI, ANTONIO MARIA;ROVELLI, TIZIANO;SIROLI, GIAN PIERO;GUIDUCCI, LUIGI;BRIGLIADORI, LUCA
2011

Abstract

A search for Z bosons in the muon+muon- decay channel has been performed in PbPb collisions at sqrt(sNN) = 2:76 TeV with the CMS detector at the LHC, in a 7.2 microbarn^-1 data sample. The number of opposite-sign muon pairs observed in the 60–120 GeV/c^2 invariant mass range is 39, corresponding to a yield per unit of rapidity (y) and per minimum bias event of [33.8 +- 5.5 (stat) +- 4.4 (syst)] x10^-8, in the |y| < 2.0 range. Rapidity, transverse momentum, and centrality dependencies are also measured. The results agree with next-to-leading order QCD calculations, scaled by the number of incoherent nucleon-nucleon collisions.
2011
S. CHATRCHYAN, V. KHACHATRYAN, A.M. SIRUNYAN, A. TUMASYAN, W. ADAM, T. BERGAUER, et al. (2011). Study of Z boson production in PbPb collisions at sqrt(sNN)=2.76 TeV. PHYSICAL REVIEW LETTERS, 106, 212301-1-212301-14 [10.1103/PhysRevLett.106.212301].
S. CHATRCHYAN; V. KHACHATRYAN; A.M. SIRUNYAN; A. TUMASYAN; W. ADAM; T. BERGAUER; M. DRAGICEVIC; J. ER O; C. FABJAN; M. FRIEDL; R. FRUHWIRTH; V.M. GHET...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/119695
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