Measurement of the relative yields of $\psi(2S)$ to $\psi(1S)$ mesons produced at forward and backward rapidity in $p+p$, $p+$Al, $p+$Au, and $^{3}$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV - INSPIRE

DataBETA

Measurement of the relative yields of $\psi(2S)$ to $\psi(1S)$ mesons produced at forward and backward rapidity in $p+p$ , $p+$ Al, $p+$ Au, and $^{3}$ He $+$ Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

PHENIX

Collaboration

•

A. Adare
(
- Colorado U.
)

Sep 21, 2016

10 pages

Published in:

Phys.Rev.C 95 (2017) 3, 034904

Published: Mar 9, 2017

e-Print:

1609.06550 [nucl-ex]

DOI:

10.1103/PhysRevC.95.034904

Experiments:

BNL-RHIC-PHENIX

View in:

reference search54 citations

Citations per year

Abstract: (APS)

The PHENIX Collaboration has measured the ratio of the yields of ψ(2S) to ψ(1S) mesons produced in p+p, p+Al, p+Au, and He3+Au collisions at sNN=200 GeV over the forward and backward rapidity intervals 1.2<|y|<2.2. We find that the ratio in p+p collisions is consistent with measurements at other collision energies. In collisions with nuclei, we find that in the forward (p-going or He3-going) direction, the relative yield of ψ(2S) mesons to ψ(1S) mesons is consistent with the value measured in p+p collisions. However, in the backward (nucleus-going) direction, the ψ(2S) meson is preferentially suppressed by a factor of ∼2. This suppression is attributed in some models to the breakup of the weakly bound ψ(2S) meson through final-state interactions with comoving particles, which have a higher density in the nucleus-going direction. These breakup effects may compete with color screening in a deconfined quark-gluon plasma to produce sequential suppression of excited quarkonia states.

Note:

364 authors, 10 pages, 5 figures, 2 tables, 2014,15 data. v2 is version accepted by Phys. Rev. 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

quark antiquark
yield: ratio: measured
fragmentation: effect
branching ratio
quark gluon: plasma
color: screening
density: high
p p: scattering
psi mesons
psi(3685)

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