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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00556874" target="_blank" >RIV/61389005:_____/22:00556874 - 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/ψ in p + Au collisions at √sNN = 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.

Czech name

—

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

10304 - Nuclear physics

Project

<a href="/en/project/LTT18002" target="_blank" >LTT18002: Study of new properties of nuclear matter in the international experiment STAR</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

136865

UT code for WoS article

000778434900007

EID of the result in the Scopus database

2-s2.0-85122630494