Measurement of cold nuclear matter effects for inclusive J/ψ in p+Au collisions at √sNN=200 GeV

• Verfasst von: Abdallah, Mohamed Samy [VerfasserIn]
• Verfasst von: Deppner, Ingo Martin [VerfasserIn]
• Verfasst von: Herrmann, Norbert [VerfasserIn]
• Verfasst von: Söhngen, Yannick [VerfasserIn]
• Verfasst von: Weidenkaff, Philipp [VerfasserIn]
• Titel: Measurement of cold nuclear matter effects for inclusive J/ψ in p+Au collisions at √sNN=200 GeV
• Körperschaft: STAR Collaboration [VerfasserIn]
• Verf.angabe: STAR collaboration: M.S. Abdallah, I.M. Deppner, N. Herrmann, Y. Söhngen, P.C. Weidenkaff [und viele weitere Personen]
• E-Jahr: 2022
• Jahr: 6 January 2022
• Umfang: 10 S.
• Fussnoten: Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt ; Gesehen am 18.05.2022
• Titel Quelle: Enthalten in: Physics letters / B
• Ort Quelle: Amsterdam : North-Holland Publ., 1967
• Jahr Quelle: 2022
• Band/Heft Quelle: 825(2022), Artikel-ID 136865, Seite 1-10
• ISSN Quelle: 1873-2445
• DOI: doi:10.1016/j.physletb.2021.136865
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Cold nuclear matter effects
• Sach-SW: RHIC
• Sach-SW: suppression
• K10plus-PPN: 1802481389

Abstract

Measurement by the STAR experiment at RHIC of the cold nuclear matter (CNM) effects experienced by inclusive J/ψ at mid-rapidity in 0-100% p+Au collisions at sNN = 200 GeV is presented. Such effects are quantified utilizing the nuclear modification factor, RpAu, obtained by taking a ratio of J/ψ yield in p+Au collisions to that in p+p collisions scaled by the number of binary nucleon-nucleon collisions. The differential J/ψ yield in both p+p and p+Au collisions is measured through the dimuon decay channel, taking advantage of the trigger capability provided by the Muon Telescope Detector in the RHIC 2015 run. Consequently, the J/ψ RpAu is derived within the transverse momentum (pT) range of 0 to 10 GeV/c. A suppression of approximately 30% is observed for pT<2 GeV/c, while J/ψ RpAu becomes compatible with unity for pT greater than 3 GeV/c, indicating the J/ψ yield is minimally affected by the CNM effects at high pT. Comparison to a similar measurement from 0-20% central Au+Au collisions reveals that the observed strong J/ψ suppression above 3 GeV/c is mostly due to the hot medium effects, providing strong evidence for the formation of the quark-gluon plasma in these collisions. Several model calculations show qualitative agreement with the measured J/ψ RpAu, while their agreement with the J/ψ yields in p+p and p+Au collisions is worse.