Centrality and Transverse Momentum Dependence of Elliptic Flow of Multistrange Hadrons and ϕ Meson in Au+Au Collisions at √[sNN]=200 GeV.
L Adamczyk, J K Adkins, G Agakishiev, M M Aggarwal, Z Ahammed, I Alekseev, A Aparin, D Arkhipkin, E C Aschenauer, G S Averichev, V Bairathi, A Banerjee, R Bellwied, A Bhasin, A K Bhati, P Bhattarai, J Bielcik, J Bielcikova, L C Bland, I G Bordyuzhin, J Bouchet, A V Brandin, I Bunzarov, J Butterworth, H Caines, M Calderón de la Barca Sánchez, J M Campbell, D Cebra, M C Cervantes, I Chakaberia, P Chaloupka, Z Chang, S Chattopadhyay, J H Chen, X Chen, J Cheng, M Cherney, W Christie, G Contin, H J Crawford, S Das, L C De Silva, R R Debbe, T G Dedovich, J Deng, A A Derevschikov, B di Ruzza, L Didenko, C Dilks, X Dong, J L Drachenberg, J E Draper, C M Du, L E Dunkelberger, J C Dunlop, L G Efimov, J Engelage, G Eppley, R Esha, O Evdokimov, O Eyser, R Fatemi, S Fazio, P Federic, J Fedorisin, Z Feng, P Filip, Y Fisyak, C E Flores, L Fulek, C A Gagliardi, D Garand, F Geurts, A Gibson, M Girard, L Greiner, D Grosnick, D S Gunarathne, Y Guo, S Gupta, A Gupta, W Guryn, A Hamad, A Hamed, R Haque, J W Harris, L He, S Heppelmann, S Heppelmann, A Hirsch, G W Hoffmann, D J Hofman, S Horvat, X Huang, B Huang, H Z Huang, P Huck, T J Humanic, G Igo, W W Jacobs, H Jang, K Jiang, E G Judd, S Kabana, D Kalinkin, K Kang, K Kauder, H W Ke, D Keane, A Kechechyan, Z H Khan, D P Kikoła, I Kisel, A Kisiel, L Kochenda, D D Koetke, T Kollegger, L K Kosarzewski, A F Kraishan, P Kravtsov, K Krueger, I Kulakov, L Kumar, R A Kycia, M A C Lamont, J M Landgraf, K D Landry, J Lauret, A Lebedev, R Lednicky, J H Lee, Z M Li, W Li, X Li, X Li, C Li, Y Li, M A Lisa, F Liu, T Ljubicic, W J Llope, M Lomnitz, R S Longacre, X Luo, Y G Ma, G L Ma, L Ma, R Ma, N Magdy, R Majka, A Manion, S Margetis, C Markert, H Masui, H S Matis, D McDonald, K Meehan, N G Minaev, S Mioduszewski, D Mishra, B Mohanty, M M Mondal, D A Morozov, M K Mustafa, B K Nandi, Md Nasim, T K Nayak, G Nigmatkulov, L V Nogach, S Y Noh, J Novak, S B Nurushev, G Odyniec, A Ogawa, K Oh, V Okorokov, D Olvitt, B S Page, R Pak, Y X Pan, Y Pandit, Y Panebratsev, B Pawlik, H Pei, C Perkins, A Peterson, P Pile, M Planinic, J Pluta, N Poljak, K Poniatowska, J Porter, M Posik, A M Poskanzer, J Putschke, H Qiu, A Quintero, S Ramachandran, R Raniwala, S Raniwala, R L Ray, H G Ritter, J B Roberts, O V Rogachevskiy, J L Romero, A Roy, L Ruan, J Rusnak, O Rusnakova, N R Sahoo, P K Sahu, I Sakrejda, S Salur, J Sandweiss, A Sarkar, J Schambach, R P Scharenberg, A M Schmah, W B Schmidke, N Schmitz, J Seger, P Seyboth, N Shah, E Shahaliev, P V Shanmuganathan, M Shao, B Sharma, M K Sharma, W Q Shen, S S Shi, Q Y Shou, E P Sichtermann, R Sikora, M Simko, S Singha, M J Skoby, D Smirnov, N Smirnov, L Song, P Sorensen, H M Spinka, B Srivastava, T D S Stanislaus, M Stepanov, R Stock, M Strikhanov, B Stringfellow, M Sumbera, B Summa, X Sun, X M Sun, Y Sun, Z Sun, B Surrow, N Svirida, M A Szelezniak, A H Tang, Z Tang, T Tarnowsky, A Tawfik, J H Thomas, A R Timmins, D Tlusty, M Tokarev, S Trentalange, R E Tribble, P Tribedy, S K Tripathy, B A Trzeciak, O D Tsai, T Ullrich, D G Underwood, I Upsal, G Van Buren, G van Nieuwenhuizen, M Vandenbroucke, R Varma, A N Vasiliev, R Vertesi, F Videbæk, Y P Viyogi, S Vokal, S A Voloshin, A Vossen, Y Wang, G Wang, J S Wang, H Wang, Y Wang, F Wang, J C Webb, G Webb, L Wen, G D Westfall, H Wieman, S W Wissink, R Witt, Y F Wu, Y Wu, Z G Xiao, W Xie, K Xin, N Xu, Z Xu, Q H Xu, Y F Xu, H Xu, Q Yang, Y Yang, Y Yang, S Yang, C Yang, Z Ye, P Yepes, L Yi, K Yip, I-K Yoo, N Yu, H Zbroszczyk, W Zha, Z Zhang, Y Zhang, J B Zhang, J Zhang, S Zhang, J Zhang, X P Zhang, J Zhao, C Zhong, L Zhou, X Zhu, Y Zoulkarneeva, M Zyzak
We present high precision measurements of elliptic flow near midrapidity (|y|<1.0) for multistrange hadrons and ϕ meson as a function of centrality and transverse momentum in Au+Au collisions at center of mass energy √[sNN]=200 GeV. We observe that the transverse momentum dependence of ϕ and Ω v2 is similar to that of π and p, respectively, which may indicate that the heavier strange quark flows as strongly as the lighter up and down quarks. This observation constitutes a clear piece of evidence for the development of partonic collectivity in heavy-ion collisions at the top RHIC energy. Number of constituent quark scaling is found to hold within statistical uncertainty for both 0%-30% and 30%-80% collision centrality. There is an indication of the breakdown of previously observed mass ordering between ϕ and proton v2 at low transverse momentum in the 0%-30% centrality range, possibly indicating late hadronic interactions affecting the proton v2.
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