Measurement of cold nuclear matter effects for inclusive J/psi in p plus Au collisions at root s(NN)=200 GeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F22%3A00359918" target="_blank" >RIV/68407700:21340/22:00359918 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.physletb.2021.136865" target="_blank" >https://doi.org/10.1016/j.physletb.2021.136865</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2021.136865" target="_blank" >10.1016/j.physletb.2021.136865</a>

Result language

angličtina

Original language name

Measurement of cold nuclear matter effects for inclusive J/psi in p plus Au collisions at root s(NN)=200 GeV

Original language description

Measurement by the STAR experiment at RHIC of the cold nuclear matter (CNM) effects experienced by inclusive J/psi at mid-rapidity in 0-100% p+Au collisions at root s(NN) = 200 GeV is presented. Such effects are quantified utilizing the nuclear modification factor, R-pAu, obtained by taking a ratio of J/* yield in p+Au collisions to that in p+p collisions scaled by the number of binary nucleon-nucleon collisions. The differential J/psi 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/psi R-pAu is derived within the transverse momentum (p(T)) range of 0 to 10 GeV/c. A suppression of approximately 30% is observed for p(T) <= 2 GeV/c, while J/psi R-pAu becomes compatible with unity for p(T) greater than 3 GeV/c, indicating the J/psi yield is minimally affected by the CNM effects at high p(T). Comparison to a similar measurement from 0-20% central Au+Au collisions reveals that the observed strong J/psi 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/psi R-pAu, while their agreement with the J/psi yields in p+p and p+Au collisions is worse. (C) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Volume of the periodical

825

Issue of the periodical within the volume

Feb

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

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UT code for WoS article

000778434900007

EID of the result in the Scopus database

2-s2.0-85122630494