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

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:
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Publication Date:
Report Number(s):
BNL-113789-2017-JA
Journal ID: ISSN 2470-0010
Grant/Contract Number:
SC0012704
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)
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Orgs:
PHENIX Collaboration
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1354690
Alternate Identifier(s):
OSTI ID: 1378145