Rapidity and transverse momentum dependence of inclusive J/psi production in pp collisions at root s=7 TeV: [plus] Erratum

K. Aamodt...[et al.], A. Quintana, A. D. Abrahantes, Ian Bearden, Hans Bøggild, Christian Holm Christensen, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Hans Hjersing Dalsgaard, Carsten Søgaard, Børge Svane Nielsen, Casper Nygaard

136 Citationer (Scopus)

Abstract

The ALICE experiment at the LHC has studied inclusive J/Ψ production at central and forward rapidities in pp collisions at s=7 TeV. In this Letter, we report on the first results obtained detecting the J/Ψ through the dilepton decay into e+e- and μ+ μ- pairs in the rapidity ranges |y|<0.9 and 2.5<y<4, respectively, and with acceptance down to zero pT. In the dielectron channel the analysis was carried out on a data sample corresponding to an integrated luminosity Lint=5.6 nb- 1 and the number of signal events is NJ/Ψ=352±32(stat.)±28(syst.); the corresponding figures in the dimuon channel are Lint=15.6 nb-1 and NJ/Ψ=1924±77(stat.)±144(syst.). The measured production cross sections are σJ/Ψ(|y|<0.9)=10.7±1.0(stat.)±1.6(syst.)-2.3+1.6(syst.pol.)μb and σJ/Ψ(2.5<y<4)=6.31±0.25(stat.)±0.76(syst.)-1.96+0.95(syst.pol.)μb. The differential cross sections, in transverse momentum and rapidity, of the J/Ψ were also measured.

OriginalsprogEngelsk
TidsskriftPhysics Letters B
Vol/bind704
Udgave nummer5
Sider (fra-til)442-455
ISSN0370-2693
DOI
StatusUdgivet - 25 okt. 2011

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