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

Autori
Chatrchyan, S. ; ... ; Godinović, Nikola ; Lelas, Damir ; Lelas, Karlo ; Pleština, Roko ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Dželalija, Mile ; Brigljević, Vuko ; Đurić, Senka ; Kadija, Krešo ; Morović, Srećko ; ... ; Weinberg, M.

Izvornik
Physical Review Letters (0031-9007) 106 (2011), 21; 212301-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
LHC; CMS; Physics; Heavy Ions

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

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
The CMS Collaboration

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