J/[psi] production cross section and its dependence on charged-particle multiplicity in p+p collisions at √s=200 GeV

• Verfasst von: Adam, Jaroslav [VerfasserIn]
• Verfasst von: Deppner, Ingo Martin [VerfasserIn]
• Verfasst von: Herrmann, Norbert [VerfasserIn]
• Titel: J/[psi] production cross section and its dependence on charged-particle multiplicity in p+p collisions at √s=200 GeV
• Körperschaft: STAR Collaboration [VerfasserIn]
• Verf.angabe: STAR Collaboration, J. Adam, I.M. Deppner, N. Herrmann [und weitere]
• E-Jahr: 2018
• Jahr: 19 September 2018
• Umfang: 7 S.
• Fussnoten: Gesehen am 04.07.2019
• Titel Quelle: Enthalten in: Physics letters / B
• Ort Quelle: Amsterdam : North-Holland Publ., 1967
• Jahr Quelle: 2018
• Band/Heft Quelle: 786(2018), Seite 87-93
• ISSN Quelle: 1873-2445
• DOI: doi:10.1016/j.physletb.2018.09.029
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Charged-particle multiplicity
• Sach-SW: collisions
• Sach-SW: Multiple parton interactions
• Sach-SW: Quarkonium
• K10plus-PPN: 166860471X

Abstract

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.