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

Adare, A; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Akimoto, R.; Alfred, M.; Andrieux, V.; Aoki, K.; Apadula, N and Aramaki, Y, et al. (2017) In Physical Review D - Particles, Fields, Gravitation and Cosmology 95(9).
Abstract

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. The data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.

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published
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Physical Review D - Particles, Fields, Gravitation and Cosmology
volume
95
issue
9
publisher
American Physical Society
external identifiers
  • scopus:85020079986
  • wos:000401231900001
ISSN
2470-0010
DOI
10.1103/PhysRevD.95.092003
language
English
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yes
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41cb24e3-ccb6-4d5a-9788-13c180b99f1c
date added to LUP
2017-06-29 08:30:08
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2019-02-20 10:41:54
@article{41cb24e3-ccb6-4d5a-9788-13c180b99f1c,
  abstract     = {<p>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&lt;pT&lt;10 GeV/c and rapidity 1.2&lt;y&lt;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. The data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.</p>},
  articleno    = {092003},
  author       = {Adare, A and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Akimoto, R. and Alfred, M. and Andrieux, V. and Aoki, K. and Apadula, N and Aramaki, Y and Asano, H. and Atomssa, E. T. and Awes, T. C. and Ayuso, Carmen and Azmoun, B. and Babintsev, V. and Bai, M and Bandara, N. S. and Bannier, B and Barish, K N and Bathe, S and Bazilevsky, A and Beaumier, M. and Beckman, S. and Belmont, R and Berdnikov, A and Berdnikov, Y. and Black, D and Blau, D. S. and Boer, M. and Bok, J S and Bownes, E. K. and Boyle, K and Brooks, M L and Bryslawskyj, J. and Buesching, H and Bumazhnov, V. and Butler, Christopher C. and Campbell, S. and Canoa Roman, V. and Cervantes, R. and Chen, C. H. and Chi, C Y and Chiu, M and Choi, I J and Choi, J B and Chujo, T. and Citron, Z. and Oskarsson, A. and Silvermyr, D. and , },
  issn         = {2470-0010},
  language     = {eng},
  month        = {05},
  number       = {9},
  publisher    = {American Physical Society},
  series       = {Physical Review D - Particles, Fields, Gravitation and Cosmology},
  title        = {Angular decay coefficients of J /ψ mesons at forward rapidity from p+p collisions at s =510 GeV},
  url          = {http://dx.doi.org/10.1103/PhysRevD.95.092003},
  volume       = {95},
  year         = {2017},
}