학술논문

Azimuthal anisotropy in U+U and Au+Au collisions at RHIC
Document Type
Working Paper
Author
STAR CollaborationAdamczyk, L.Adkins, J. K.Agakishiev, G.Aggarwal, M. M.Ahammed, Z.Alekseev, I.Alford, J.Aparin, A.Arkhipkin, D.Aschenauer, E. C.Averichev, G. S.Bairathi, V.Banerjee, A.Bellwied, R.Bhasin, A.Bhati, A. K.Bhattarai, P.Bielcik, J.Bielcikova, J.Bland, L. C.Bordyuzhin, I. G.Bouchet, J.Brandin, A. V.Bunzarov, I.Butterworth, J.Caines, H.Sánchez, M. Calderón de la BarcaCampbell, J. M.Cebra, D.Cervantes, M. C.Chakaberia, I.Chaloupka, P.Chang, Z.Chattopadhyay, S.Chen, J. H.Chen, X.Cheng, J.Cherney, M.Christie, W.Contin, G.Crawford, H. J.Das, S.De Silva, L. C.Debbe, R. R.Dedovich, T. G.Deng, J.Derevschikov, A. A.di Ruzza, B.Didenko, L.Dilks, C.Dong, X.Drachenberg, J. L.Draper, J. E.Du, C. M.Dunkelberger, L. E.Dunlop, J. C.Efimov, L. G.Engelage, J.Eppley, G.Esha, R.Evdokimov, O.Eyser, O.Fatemi, R.Fazio, S.Federic, P.Fedorisin, J.Feng, Z.Filip, P.Fisyak, Y.Flores, C. E.Fulek, L.Gagliardi, C. A.Garand, D.Geurts, F.Gibson, A.Girard, M.Greiner, L.Grosnick, D.Gunarathne, D. S.Guo, Y.Gupta, A.Gupta, S.Guryn, W.Hamad, A.Hamed, A.Haque, R.Harris, J. W.He, L.Heppelmann, S.Hirsch, A.Hoffmann, G. W.Hofman, D. J.Horvat, S.Huang, B.Huang, H. Z.Huang, X.Huck, P.Humanic, T. J.Igo, G.Jacobs, W. W.Jang, H.Jiang, K.Judd, E. G.Kabana, S.Kalinkin, D.Kang, K.Kauder, K.Ke, H. W.Keane, D.Kechechyan, A.Khan, Z. H.Kikola, D. P.Kisel, I.Kisiel, A.Kochenda, L.Koetke, D. D.Kollegger, T.Kosarzewski, L. K.Kraishan, A. F.Kravtsov, P.Krueger, K.Kulakov, I.Kumar, L.Kycia, R. A.Lamont, M. A. C.Landgraf, J. M.Landry, K. D.Lauret, J.Lebedev, A.Lednicky, R.Lee, J. H.Li, X.Li, Z. M.Li, Y.Li, W.Li, C.Lisa, M. A.Liu, F.Ljubicic, T.Llope, W. J.Lomnitz, M.Longacre, R. S.Luo, X.Ma, G. L.Ma, R.Ma, Y. G.Ma, L.Magdy, N.Majka, R.Manion, A.Margetis, S.Markert, C.Masui, H.Matis, H. S.McDonald, D.Meehan, K.Minaev, N. G.Mioduszewski, S.Mishra, D.Mohanty, B.Mondal, M. M.Morozov, D. A.Mustafa, M. K.Nandi, B. K.Nasim, Md.Nayak, T. K.Nigmatkulov, G.Nogach, L. V.Noh, S. Y.Novak, J.Nurushev, S. B.Odyniec, G.Ogawa, A.Oh, K.Okorokov, V.Olvitt Jr., D.Page, B. S.Pak, R.Pan, Y. X.Pandit, Y.Panebratsev, Y.Pawlik, B.Pei, H.Perkins, C.Peterson, A.Pile, P.Planinic, M.Pluta, J.Poljak, N.Poniatowska, K.Porter, J.Posik, M.Poskanzer, A. M.Putschke, J.Qiu, H.Quintero, A.Ramachandran, S.Raniwala, R.Raniwala, S.Ray, R. L.Ritter, H. G.Roberts, J. B.Rogachevskiy, O. V.Romero, J. L.Roy, A.Ruan, L.Rusnak, J.Rusnakova, O.Sahoo, N. R.Sahu, P. K.Sakrejda, I.Salur, S.Sandweiss, J.Sarkar, A.Schambach, J.Scharenberg, R. P.Schmah, A. M.Schmidke, W. B.Schmitz, N.Seger, J.Seyboth, P.Shah, N.Shahaliev, E.Shanmuganathan, P. V.Shao, M.Sharma, M. K.Sharma, B.Shen, W. Q.Shi, S. S.Shou, Q. Y.Sichtermann, E. P.Sikora, R.Simko, M.Skoby, M. J.Smirnov, N.Smirnov, D.Song, L.Sorensen, P.Spinka, H. M.Srivastava, B.Stanislaus, T. D. S.Stepanov, M.Stock, R.Strikhanov, M.Stringfellow, B.Sumbera, M.Summa, B.Sun, Z.Sun, X. M.Sun, Y.Sun, X.Surrow, B.Svirida, N.Szelezniak, M. A.Tang, Z.Tang, A. H.Tarnowsky, T.Tawfik, A.Thomas, J. H.Timmins, A. R.Tlusty, D.Tokarev, M.Trentalange, S.Tribble, R. E.Tribedy, P.Tripathy, S. K.Trzeciak, B. A.Tsai, O. D.Ullrich, T.Underwood, D. G.Upsal, I.Van Buren, G.van Nieuwenhuizen, G.Vandenbroucke, M.Varma, R.Vasiliev, A. N.Vertesi, R.Videbæk, F.Viyogi, Y. P.Vokal, S.Voloshin, S. A.Vossen, A.Wang, G.Wang, H.Wang, J. S.Wang, Y.Wang, F.Webb, J. C.Webb, G.Wen, L.Westfall, G. D.Wieman, H.Wissink, S. W.Witt, R.Wu, Y. F.Xiao, Z. G.Xie, W.Xin, K.Xu, Y. F.Xu, Q. H.Xu, H.Xu, N.Xu, Z.Yang, Y.Yang, C.Yang, S.Yang, Q.Ye, Z.Yepes, P.Yi, L.Yip, K.Yoo, I. -K.Yu, N.Zbroszczyk, H.Zha, W.Zhang, J. B.Zhang, Z.Zhang, J.Zhang, S.Zhang, X. P.Zhang, Y.Zhao, J.Zhong, C.Zhou, L.Zhu, X.Zoulkarneeva, Y.Zyzak, M.
Source
Phys. Rev. Lett. 115, 222301 (2015)
Subject
Nuclear Experiment
Nuclear Theory
Language
Abstract
Collisions between prolate uranium nuclei are used to study how particle production and azimuthal anisotropies depend on initial geometry in heavy-ion collisions. We report the two- and four-particle cumulants, $v_2\{2\}$ and $v_2\{4\}$, for charged hadrons from U+U collisions at $\sqrt{s_{\rm NN}}$ = 193 GeV and Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV. Nearly fully overlapping collisions are selected based on the amount of energy deposited by spectators in the STAR Zero Degree Calorimeters (ZDCs). Within this sample, the observed dependence of $v_2\{2\}$ on multiplicity demonstrates that ZDC information combined with multiplicity can preferentially select different overlap configurations in U+U collisions. An initial-state model with gluon saturation describes the slope of $v_2\{2\}$ as a function of multiplicity in central collisions better than one based on Glauber with a two-component multiplicity model.
Comment: Final paper version accepted for publication in Phys. Rev. Lett. New version includes comparisons to a constituent quark glauber model