- Adamczyk, L
- Adkins, JK
- Agakishiev, G
- Aggarwal, MM
- Ahammed, Z
- Alekseev, I
- Alford, J
- Anson, CD
- Aparin, A
- Arkhipkin, D
- Aschenauer, EC
- Averichev, GS
- Balewski, J
- Banerjee, A
- Barnovska, Z
- Beavis, DR
- Bellwied, R
- Bhasin, A
- Bhati, AK
- Bhattarai, P
- Bichsel, H
- Bielcik, J
- Bielcikova, J
- Bland, LC
- Bordyuzhin, IG
- Borowski, W
- Bouchet, J
- Brandin, AV
- Brovko, SG
- Bültmann, S
- Bunzarov, I
- Burton, TP
- Butterworth, J
- Caines, H
- Calderon de la Barca Sanchez, M
- Cebra, D
- Cendejas, R
- Cervantes, MC
- Chaloupka, P
- Chang, Z
- Chattopadhyay, S
- Chen, HF
- Chen, JH
- Chen, L
- Cheng, J
- Cherney, M
- Chikanian, A
- Christie, W
- Chwastowski, J
- Codrington, MJM
- Corliss, R
- Cramer, JG
- Crawford, HJ
- Cui, X
- Das, S
- Davila Leyva, A
- De Silva, LC
- Debbe, RR
- Dedovich, TG
- Deng, J
- Derevschikov, AA
- Derradi de Souza, R
- Dhamija, S
- di Ruzza, B
- Didenko, L
- Dilks, C
- Ding, F
- Djawotho, P
- Dong, X
- Drachenberg, JL
- Draper, JE
- Du, CM
- Dunkelberger, LE
- Dunlop, JC
- Efimov, LG
- Engelage, J
- Engle, KS
- Eppley, G
- Eun, L
- Evdokimov, O
- Fatemi, R
- Fazio, S
- Fedorisin, J
- Filip, P
- Finch, E
- Fisyak, Y
- Flores, CE
- Gagliardi, CA
- Gangadharan, DR
- Garand, D
- Geurts, F
- Gibson, A
- Girard, M
- Gliske, S
- Grosnick, D
- Guo, Y
- Gupta, A
- Gupta, S
- Guryn, W
- Haag, B
- et al.
We report measurements of Υ{hooked} meson production in p + p, d + Au, and Au + Au collisions using the STAR detector at RHIC. We compare the Υ{hooked} 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 Υ{hooked}(1S + 2S + 3S) in the rapidity range |y| < 1 in d + Au collisions of R dAu = 0.79 ± 0.24(stat.) ± 0.03(syst.) ± 0.10(p + psyst.). 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 A A = 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 Υ{hooked} mesons in Au + Au collisions. The 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. © 2014.