| Thème(s) : |
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Physique/Physique Nucléaire Expérimentale
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| Titre : |
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Upsilon (1S+2S+3S) production in d+Au and p+p collisions at sqrt(s_NN)=200 GeV and cold-nuclear matter effects |
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| Auteur : |
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A. Adare, E.T. Atomssa1, Z. Conesa Del Valle1, D. d'Enterria1, O. Drapier1, F. Fleuret1, M. Gonin1, R. Granier de Cassagnac1, A. Rakotozafindrabe1, V.N. Tram1, L. Aphecetche2, A. Hadj Henni2, G. Roche3, P. Rosnet3, D. Jouan4 |
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| Laboratoire : |
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| Résumé : |
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The three Upsilon states, Upsilon(1S+2S+3S), are measured in d+Au and p+p collisions at sqrt(s_NN)=200 GeV and rapidities 1.2<|y|<2.2 by the PHENIX experiment at the Relativistic Heavy-Ion Collider. Cross sections for the inclusive Upsilon(1S+2S+3S) production are obtained. The inclusive yields per binary collision for d+Au collisions relative to those in p+p collisions (R_dAu) are found to be 0.62 +/- 0.26 (stat) +/- 0.13 (syst) in the gold-going direction and 0.91 +/- 0.33 (stat) +/- 0.16 (syst) in the deuteron-going direction. The measured results are compared to a nuclear-shadowing model, EPS09 [JHEP 04, 065 (2009)], combined with a final-state breakup cross section, sigma_br, and compared to lower energy p+A results. We also compare the results to the PHENIX J/psi results [Phys. Rev. Lett. 107, 142301 (2011)]. The rapidity dependence of the observed Upsilon suppression is consistent with lower energy p+A measurements. |
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| Collaboration/Projet : |
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PHENIX |
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| Type de publication : |
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Pré-publications |
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Date de publication
ou d'écriture : |
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2012 |
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| Identifiant local : |
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SUBATECH-Plasma |
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| Commentaire : |
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see paper for full list of authors, 495 authors, 11 pages, 9 figures, 5 tables. Submitted to Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html |
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