Abstract
We report measurements of Υ meson production in p + p, d + Au, and Au+Au collisions using the STAR detector at RHIC. We compare the Υ yield to the measured cross section in p + p collisions in order to quantify any modifications of the yield in cold nuclear matter using d + Au data and in hot nuclear matter using Au+Au data separated into three centrality classes. Our p + p measurement is based on three times the statistics of our previous result. We obtain a nuclear modification factor for Upsilon (1S + 2S + 3S) in the rapidity range |y| < 1 in d + Au collisions of RdAu = 0.79 ± 0.24(stat.) ± 0.03(syst.) ± 0.10(p + p syst.). A comparison with models including shadowing and initial state parton energy loss indicates the presence of additional cold-nuclear matter suppression. Similarly, in the top 10% most-central Au + Au collisions, we measure a nuclear modification factor of R AA = 0.49 ±0.1(stat.) ±0.02(syst.) ±0.06(p + p syst.), which is a larger suppression factor than that seen in cold nuclear matter. Our results are consistent with complete suppression of excited-state Upsilon mesons in Au + Au collisions. Themore » additional suppression in Au + Au is consistent with the level expected in model calculations that include the presence of a hot, deconfined Quark–Gluon Plasma. However, understanding the suppression seen in d + Au is still needed before any definitive statements about the nature of the suppression in Au + Au can be made.« less
Highlights
Letter [1] we reported on Au and Au + Au collisions mate√assuNreNm=en2t0s0oGf eΥV
We have uncovered a mistake in the original errors reported, affecting some of the statistical uncertainties of the d + Au nuclear modification factors, RdA
The results are listed in the form a ± b ± c ± d ± e where a is RdAu or R A A, b is the d + Au or Au + Au statistical uncertainty, c is the p + p statistical uncertainty, d is the d + Au or Au + Au systematic uncertainty, and e is the p + p systematic uncertainty
Summary
Adamczyk, J.; Adkins, J. K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Alford, J.; Anson, C. D.; Aparin, A.; Arkhipkin, D.; and Bültmann, S., "Corrigendum to "Suppression of Υ Production in d + Au and Au + Au collisions at √Sɴɴ = 200 GeV" (Phys. Lett. B Vol 735 (2014) 127-137)" (2015). Physics Faculty Publications. 51. https://digitalcommons.odu.edu/physics_fac_pubs/51
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