TY - JOUR
T1 - Measurement of J/Ψ production in pp collisions at s√=7 TeV
AU - Playfer, Stephen
AU - Clark, Philip
AU - Needham, Matthew
AU - Muheim, Franz
AU - Clarke, Peter
AU - Xie, Yuehong
AU - Eisenhardt, Stephan
AU - The LHCb Collaboration
N1 - Eur.Phys.J. C71 (2011) 1645
PY - 2011/3/3
Y1 - 2011/3/3
N2 - The production of J/ψ mesons in proton-proton collisions at s√=7\tev is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/ψ production is measured as a function of the J/ψ transverse momentum p_{\rm T}\ and rapidity y in the fiducial region pT∈[0;14]\gevc and y∈[2.0;4.5]. The differential cross-section and fraction of \j psi\ from b-hadron decays are also measured in the same p_{\rm T}\ and y range s. The analysis is based on a data sample corresponding to an integrated luminos ity of 5.2\pbinv. The measured cross-sections integrated over the fiducial region are 10.52±0.04±1.40+1.64−2.20\microb for prompt J/ψ production and 1.14±0.01±0.16\microb for J/ψ from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/ψ production cross-section is obtained assuming no J/ψ polarisation and the third error indicates the acceptance uncertainty due to this assumption.
AB - The production of J/ψ mesons in proton-proton collisions at s√=7\tev is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/ψ production is measured as a function of the J/ψ transverse momentum p_{\rm T}\ and rapidity y in the fiducial region pT∈[0;14]\gevc and y∈[2.0;4.5]. The differential cross-section and fraction of \j psi\ from b-hadron decays are also measured in the same p_{\rm T}\ and y range s. The analysis is based on a data sample corresponding to an integrated luminos ity of 5.2\pbinv. The measured cross-sections integrated over the fiducial region are 10.52±0.04±1.40+1.64−2.20\microb for prompt J/ψ production and 1.14±0.01±0.16\microb for J/ψ from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/ψ production cross-section is obtained assuming no J/ψ polarisation and the third error indicates the acceptance uncertainty due to this assumption.
UR - http://www.scopus.com/inward/record.url?scp=84857735500&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-011-1645-y
DO - 10.1140/epjc/s10052-011-1645-y
M3 - Article
VL - 71
JO - European Physical Journal C
JF - European Physical Journal C
SN - 1434-6044
IS - 5
M1 - 1645
ER -