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1.	Adare, A, et al. (author) Angular decay coefficients of J /ψ mesons at forward rapidity from p+p collisions at s =510 GeV 2017 In: Physical Review D - Particles, Fields, Gravitation and Cosmology. - 2470-0010. ; 95:9 Journal article (peer-reviewed)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
2.	Adare, A, et al. (author) Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in p+p, p+Al, p+Au, and He 3 +Au collisions at s NN =200 GeV 2017 In: Physical Review C: covering nuclear physics. - 2469-9985. ; 95:3 Journal article (peer-reviewed)abstract The PHENIX Collaboration has measured the ratio of the yields of ψ(2S) to ψ(1S) mesons produced in p+p, p+Al, p+Au, and He3+Au collisions at sNN=200 GeV over the forward and backward rapidity intervals 1.2<\|y\|<2.2. We find that the ratio in p+p collisions is consistent with measurements at other collision energies. In collisions with nuclei, we find that in the forward (p-going or He3-going) direction, the relative yield of ψ(2S) mesons to ψ(1S) mesons is consistent with the value measured in p+p collisions. However, in the backward (nucleus-going) direction, the ψ(2S) meson is preferentially suppressed by a factor of ∼2. This suppression is attributed in some models to the breakup of the weakly bound ψ(2S) meson through final-state interactions with comoving particles, which have a higher density in the nucleus-going direction. These breakup effects may compete with color screening in a deconfined quark-gluon plasma to produce sequential suppression of excited quarkonia states.

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Type of publication: journal article (2)

Type of content: peer-reviewed (2)

Author/Editor: Silvermyr, D. (2); Oskarsson, A. (2); Bathe, S. (2); Boyle, K (2); Berdnikov, Y. (2); Chujo, T. (2); show more...; Canoa Roman, V. (2); Boer, M. (2); Belmont, R. (2); Adare, A (2); Aidala, C. (2); Ajitanand, N. N. (2); Akiba, Y. (2); Alfred, M. (2); Andrieux, V. (2); Aoki, K. (2); Apadula, N (2); Asano, H. (2); Ayuso, Carmen (2); Azmoun, B. (2); Babintsev, V. (2); Bai, M (2); Bandara, N. S. (2); Bannier, B (2); Barish, K N (2); Bazilevsky, A (2); Beaumier, M. (2); Beckman, S. (2); Berdnikov, A (2); Blau, D. S. (2); Bok, J S (2); Bownes, E. K. (2); Brooks, M L (2); Bryslawskyj, J. (2); Bumazhnov, V. (2); Butler, Christopher ... (2); Campbell, S. (2); Cervantes, R. (2); Chen, C. H. (2); Chi, C Y (2); Chiu, M (2); Choi, I J (2); Choi, J B (2); Citron, Z. (2); Akimoto, R. (1); Awes, T. C. (1); Buesching, H. (1); Aramaki, Y (1); Atomssa, E. T. (1); Black, D (1); show less...

University: Lund University (2)

Language: English (2)

Research subject (UKÄ/SCB): Natural sciences (2)

Year: 2017 (2)

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