Measurement of $\psi(2S)$ nuclear modification at backward and forward rapidity in $p$ $+$ $p$, $p$ $+$ Al, and $p$ $+$ Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

Acharya, U.A.; Aidala, C.; Akiba, Y.; Alfred, M.; Andrieux, V.; Apadula, N.; Asano, H.; Azmoun, B.; Babintsev, V.; Bandara, N.S.

doi:10.1103/PhysRevC.105.064912

Measurement of $\psi(2S)$ nuclear modification at backward and forward rapidity in $p$ $+$ $p$ , $p$ $+$ Al, and $p$ $+$ Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

PHENIX

Collaboration

Feb 8, 2022

16 pages

Published in:

Phys.Rev.C 105 (2022) 6, 064912

Published: Jun 29, 2022

e-Print:

2202.03863 [nucl-ex]

DOI:

10.1103/PhysRevC.105.064912 (publication)

Experiments:

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Abstract: (APS)

Suppression of the

J / ψ

nuclear-modification factor has been seen as a trademark signature of final-state effects in large collision systems for decades. In small systems, the nuclear modification was attributed to cold-nuclear-matter effects until the observation of strong differential suppression of the

ψ (2 S)

state in

p + A

and

d + A

collisions suggested the presence of final-state effects. Results of

J / ψ

and

ψ (2 S)

measurements in the dimuon decay channel are presented here for

p + p

,

p + Al

, and

p + Au

collision systems at

\sqrt{s_{N N}} = 200 GeV

. The results are predominantly shown in the form of the nuclear-modification factor,

R_{p A}

, the ratio of the

ψ (2 S)

invariant yield per nucleon-nucleon collision in collisions of proton on target nucleus to that in

p + p

collisions. Measurements of the

J / ψ

and

ψ (2 S)

nuclear-modification factor are compared with shadowing and transport-model predictions, as well as to complementary measurements at Large Hadron Collider energies.

Note:

315 authors from 69 institutions, 16 pages, 9 figures, 4 tables, 2015 data. v2 is version accepted for publication in Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

nucleus: target
p p: scattering
p nucleus: scattering
dimuon: decay
nucleon nucleon: scattering
psi(3685)
suppression
shadowing
J/psi(3100)
CERN LHC Coll

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Measurement of ψ(2S)\psi(2S)ψ(2S) nuclear modification at backward and forward rapidity in ppp +++ ppp, ppp +++ Al, and ppp +++ Au collisions at sNN=200\sqrt{s_{_{NN}}}=200sNN​​​=200 GeV

Citations per year

Measurement of $\psi(2S)$ nuclear modification at backward and forward rapidity in $p$ $+$ $p$ , $p$ $+$ Al, and $p$ $+$ Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV