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

Adare, A.; Azmoun, B.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Akimoto, R.; Alfred, M.

doi:10.1103/PhysRevD.95.092003

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

Journal Article · 13 April 2017 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.95.092003 · OSTI ID:1354690

Adare, A.; Azmoun, B.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Akimoto, R.; Alfred, M.

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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: PHENIX Collaboration

Grant/Contract Number:: SC0012704

OSTI ID:: 1354690

Alternate ID(s):: OSTI ID: 1378145

Report Number(s):: BNL-113789-2017-JA

Journal Information:: Physical Review. D., Vol. 95, Issue 9; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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