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J/ψ production cross section and its dependence on charged-particle multiplicity in p + p collisions at s=200 GeV
Adam, J Adamczyk, L Adams, JR Adkins, JK Agakishiev, G Aggarwal, MM Ahammed, Z Ajitanand, NN Alekseev, I Anderson, DM
Adam, J
Adamczyk, L
Adams, JR
Adkins, JK
Agakishiev, G
Aggarwal, MM
Ahammed, Z
Ajitanand, NN
Alekseev, I
Anderson, DM
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Journal Article
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2018-11-10
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10.1016/j.physletb.2018.09.029
Abstract
© 2018 The Author(s) We present a measurement of inclusive J/ψ production at mid-rapidity (|y|<1) in p+p collisions at a center-of-mass energy of s=200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The differential production cross section for J/ψ as a function of transverse momentum (pT) for 0<pT<14 GeV/c and the total cross section are reported and compared to calculations from the color evaporation model and the non-relativistic Quantum Chromodynamics model. The dependence of J/ψ relative yields in three pT intervals on charged-particle multiplicity at mid-rapidity is measured for the first time in p+p collisions at s=200 GeV and compared with that measured at s=7 TeV, PYTHIA8 and EPOS3 Monte Carlo generators, and the Percolation model prediction.
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
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