A search for Z bosons in the μ+μ- decay channel has been performed in PbPb collisions at √sNN=2.76TeV with the CMS detector at the LHC, in a 7.2μb-1 data sample. The number of opposite-sign muon pairs observed in the 60-120GeV/c2 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)]×10-8, 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 American Physical Society.

Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., et al. (2011). Study of Z boson production in PbPb collisions at √s NN=2.76TeV. PHYSICAL REVIEW LETTERS, 106(21) [10.1103/PhysRevLett.106.212301].

Study of Z boson production in PbPb collisions at √s NN=2.76TeV

BENAGLIA, ANDREA DAVIDE;DE GUIO, FEDERICO;DI MATTEO, LEONARDO;GHEZZI, ALESSIO;MALBERTI, MARTINA;MARTELLI, ARABELLA;MASSIRONI, ANDREA;PAGANONI, MARCO;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASO;TANCINI, VALENTINA;Branca, A;Govoni, P;DINARDO, MAURO EMANUELE;
2011

Abstract

A search for Z bosons in the μ+μ- decay channel has been performed in PbPb collisions at √sNN=2.76TeV with the CMS detector at the LHC, in a 7.2μb-1 data sample. The number of opposite-sign muon pairs observed in the 60-120GeV/c2 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)]×10-8, 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 American Physical Society.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (all)
English
2011
106
21
212301
none
Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., et al. (2011). Study of Z boson production in PbPb collisions at √s NN=2.76TeV. PHYSICAL REVIEW LETTERS, 106(21) [10.1103/PhysRevLett.106.212301].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/78362
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