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Title: Measurement of the relative yields of ψ ( 2 S ) to ψ ( 1 S ) mesons produced at forward and backward rapidity in p + p , p + Al , p + Au , and He 3 + Au collisions at s NN = 200 GeV

Journal Article · · Physical Review C
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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 3He+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 3He-going) direction, the relative yield of ψ(2S) mesons to ψ(1S) mesons is consistent with the value measured in \pp collisions. However, in the backward (nucleus-going) direction, the ψ(2S) is preferentially suppressed by a factor of ~2. This suppression is attributed in some models to breakup of the weakly-bound ψ(2S) 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.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
Contributing Organization:
PHENIX Collaboration
Grant/Contract Number:
AC52-06NA25396; NA0003180
OSTI ID:
1352367
Alternate ID(s):
OSTI ID: 1346436; OSTI ID: 1407966; OSTI ID: 1455065
Report Number(s):
LA-UR-16-24342; PRVCAN; TRN: US1700629
Journal Information:
Physical Review C, Vol. 95, Issue 3; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (3)

Decoding the phase structure of QCD via particle production at high energy journal September 2018
Decoding the phase structure of QCD via particle production at high energy text January 2017
In-Medium Charmonium Production in Proton-Nucleus Collisions text January 2018