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Title: Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at √s = 510 GeV

Abstract

In this paper, we report the first measurement of the full angular distribution for inclusive J/ψ → μ +μ - decays in p+p collisions at √s = 510 GeV. The measurements are made for J/ψ transverse momentum 2 < p T < 10 GeV/c and rapidity 1.2 < y < 2.2 in the Helicity, Collins-Soper, and Gottfried-Jackson reference frames. In all frames the polar coefficient λ θ is strongly negative at low p T and becomes close to zero at high p T, while the azimuthal coefficient λ Φ is close to zero at low p T, and becomes slightly negative at higher p T. The frame-independent coefficient λ ~ is strongly negative at all p T in all frames. Finally, the data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Org.:
PHENIX Collaboration
OSTI Identifier:
1354690
Alternate Identifier(s):
OSTI ID: 1378145
Report Number(s):
BNL-113789-2017-JA
Journal ID: ISSN 2470-0010
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Adare, A., Azmoun, B., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Alfred, M., and et al. Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at √s = 510 GeV. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.092003.
Adare, A., Azmoun, B., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Alfred, M., & et al. Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at √s = 510 GeV. United States. doi:10.1103/PhysRevD.95.092003.
Adare, A., Azmoun, B., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Alfred, M., and et al. Thu . "Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at √s = 510 GeV". United States. doi:10.1103/PhysRevD.95.092003. https://www.osti.gov/servlets/purl/1354690.
@article{osti_1354690,
title = {Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at √s = 510 GeV},
author = {Adare, A. and Azmoun, B. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Akimoto, R. and Alfred, M. and et al.},
abstractNote = {In this paper, we report the first measurement of the full angular distribution for inclusive J/ψ → μ+μ- decays in p+p collisions at √s = 510 GeV. The measurements are made for J/ψ transverse momentum 2 < pT < 10 GeV/c and rapidity 1.2 < y < 2.2 in the Helicity, Collins-Soper, and Gottfried-Jackson reference frames. In all frames the polar coefficient λθ is strongly negative at low pT and becomes close to zero at high pT, while the azimuthal coefficient λΦ is close to zero at low pT, and becomes slightly negative at higher pT. The frame-independent coefficient λ~ is strongly negative at all pT in all frames. Finally, the data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.},
doi = {10.1103/PhysRevD.95.092003},
journal = {Physical Review D},
number = 9,
volume = 95,
place = {United States},
year = {2017},
month = {4}
}

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