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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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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
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2017-06-29 08:30:08
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2017-09-18 11:43:43
@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 Connors, M. and Cronin, N. and Csanád, M and Csörgo, T. and Danley, T. W. and Datta, A. and Daugherity, M. S. and David, G. and DeBlasio, K. and Dehmelt, K. and Denisov, A. and Deshpande, A and Desmond, E. 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O. and Lebedev, A. and Lee, K B and Lee, S. and Lee, S. H. and Leitch, M J and Leitgab, M. and Leung, Y H and Lewis, N. A. and Li, X. and Lim, S. H. and Liu, L. D. and Liu, M. X. and Loggins, V. R. and Lovasz, K. and Lynch, D. and Majoros, T. and Makdisi, Y. I. and Makek, M. and Malaev, M. and Manion, A and Manko, V. I. and Mannel, E. and Masuda, H. and McCumber, M and McGaughey, P L and McGlinchey, D. and McKinney, C. and Meles, A. and Mendez, A. R. and Mendoza, M. and Meredith, B and Miake, Y and Mignerey, A. C. and Mihalik, D. E. and Miller, A. J. and Milov, A and Mishra, D. K. and Mitchell, J. T. and Mitsuka, G. and Miyasaka, S. and Mizuno, S. and Montuenga, P. and Moon, T. and Morrison, D. P. and Morrow, S. I.M. and Moukhanova, T. V. and Murakami, T and Murata, J. and Mwai, A. and Nagai, K. and Nagamiya, S. and Nagashima, K. and Nagashima, T. and Nagle, J L and Nagy, M I and Nakagawa, I and Nakagomi, H. and Nakano, K and Nattrass, C and Netrakanti, P. K. and Nihashi, M. and Niida, T and Nouicer, R. and Novák, T. and Novitzky, N. and Novotny, R and Nyanin, A. S. and O'Brien, E. and Ogilvie, C A and Orjuela Koop, J. D. and Osborn, J. D. and Oskarsson, A. and Ottino, G. J. and Ozawa, K. and Pak, R. and Pantuev, V. and Papavassiliou, V. and Park, J. S. and Park, S. and Pate, S F and Patel, L. and Patel, M. and Peng, J. C. and Peng, W. X and Perepelitsa, D. V. and Perera, G. D. N. and Peressounko, D. Yu. and Perezlara, C. E. and Perry, J. and Petti, R. and Phipps, M. and Pinkenburg, C. and Pinson, R. and Pisani, R. P. and Press, C. J. and Pun, A. and Purschke, M. L. and Rak, J. and Ravinovich, I and Read, K F and Reynolds, D. and Riabov, V. and Riabov, Y and Richford, D. and Rinn, T. and Riveli, N. and Roach, D and Rolnick, S D and Rosati, M and Rowan, Z. and Rubin, J. G. and Runchey, J. and Safonov, A. 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L. and Towell, M. and Towell, R. and Towell, R S and Tserruya, I and Ueda, Y and Ujvari, B. and van Hecke, H W and Vargyas, M and Vazquez-Carson, S. and Velkovska, J. and Virius, M and Vrba, V and Vukman, N. and Vznuzdaev, E. and Wang, X. R. and Wang, Z. and Watanabe, D. and Watanabe, Y and Watanabe, Y. S. and Wei, F and Whitaker, S. and Wolin, S. and Wong, C. P. and Woody, C. L. and Wysocki, M and Xia, B. and Xu, C. and Xu, Q and Xue, L. and Yalcin, S. and Yamaguchi, Y. L. and Yamamoto, H and Yanovich, A. and Yin, Peiji and Yoo, J. H. and Yoon, I. and Younus, I and Yu, H. and Yushmanov, I. E. and Zajc, W A and Zelenski, A and Zharko, S. and Zou, L. 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},
}