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Title: Coherent photo-produced J/ψ and dielectron yields in isobaric collisions

Abstract

Recently, significant enhancements of J/ψ and e +e - pair production at very low transverse momenta were observed by the STAR and ALICE collaboration in peripheral hadronic A+A collisions. The anomaly excesses point to evidence of coherent photon-nucleus and photon-photon interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. The isobaric collisions performed at RHIC provides a unique opportunity to test the existence of coherent photon products in hadronic heavy-ion collisions. The idea is that the possible production of coherent photon products is significantly different in different collision systems due to the variations in their charge and nuclear density distributions. In this letter, we focus on the peripheral collisions and provide theoretical predictions for coherent production of J/Psi and dielectron in isobaric collisions. We show that the expected yields differ significantly to perform the experimental test.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [1];  [3];  [2]
  1. University of Science and Technology of China, Hefei (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Shandong University, Jinan (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1488527
Report Number(s):
BNL-210806-2018-JAAM
Journal ID: ISSN 0370-2693
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 789; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Zha, Wangmei, Ruan, L., Tang, Z., Xu, Z., and Yang, S. Coherent photo-produced J/ψ and dielectron yields in isobaric collisions. United States: N. p., 2018. Web. doi:10.1016/j.physletb.2018.12.041.
Zha, Wangmei, Ruan, L., Tang, Z., Xu, Z., & Yang, S. Coherent photo-produced J/ψ and dielectron yields in isobaric collisions. United States. doi:10.1016/j.physletb.2018.12.041.
Zha, Wangmei, Ruan, L., Tang, Z., Xu, Z., and Yang, S. Wed . "Coherent photo-produced J/ψ and dielectron yields in isobaric collisions". United States. doi:10.1016/j.physletb.2018.12.041. https://www.osti.gov/servlets/purl/1488527.
@article{osti_1488527,
title = {Coherent photo-produced J/ψ and dielectron yields in isobaric collisions},
author = {Zha, Wangmei and Ruan, L. and Tang, Z. and Xu, Z. and Yang, S.},
abstractNote = {Recently, significant enhancements of J/ψ and e+e- pair production at very low transverse momenta were observed by the STAR and ALICE collaboration in peripheral hadronic A+A collisions. The anomaly excesses point to evidence of coherent photon-nucleus and photon-photon interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. The isobaric collisions performed at RHIC provides a unique opportunity to test the existence of coherent photon products in hadronic heavy-ion collisions. The idea is that the possible production of coherent photon products is significantly different in different collision systems due to the variations in their charge and nuclear density distributions. In this letter, we focus on the peripheral collisions and provide theoretical predictions for coherent production of J/Psi and dielectron in isobaric collisions. We show that the expected yields differ significantly to perform the experimental test.},
doi = {10.1016/j.physletb.2018.12.041},
journal = {Physics Letters. Section B},
number = C,
volume = 789,
place = {United States},
year = {2018},
month = {12}
}

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Figures / Tables:

FIG. 1. FIG. 1.: Two-dimensional distributions of the photon flux in the distant r and in the energy of photon ω for Ru + Ru (left panel) and Zr + Zr (right panel) collisions at √sNN = 200 GeV.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.