Global polarization of Λ hyperons in Au + Au collisions at sNN=200 GeV

Autor: Chensheng Zhou, T. Ullrich, Yi Wang, T. Ljubicic, H. Caines, Neha Shah, C. Zhong, X. Dong, Jeong-Hun Lee, Miroslav Simko, Ron Longacre, A. Harlenderova, Long Ma, Justin Ewigleben, G. Odyniec, Shuai Yang, Chris Perkins, Yanfang Liu, J. Schambach, J. Fedorisin, Anju Bhasin, A. J. Bassill, Xiaofeng Luo, Guo-Liang Ma, J. C. Webb, Roli Esha, Jaroslav Bielcik, Li Yi, T. Niida, W. Solyst, Daniel Nemes, Jie Zhao, H. W. Ke, L. Fulek, Jie Zhang, A. S. Hirsch, A. Lebedev, L. C. Bland, Alexandre Alarcon Do Passo Suaide, P. Kravtsov, A. M. Schmah, A. Lipiec, O. V. Rogachevskiy, I. G. Alekseev, M. A. Lisa, J. C. Mei, J. Porter, Arghya Chatterjee, Feng-Han Chang, D. N. Svirida, Ivan Kisel, D. L. Olvitt, Gary Westfall, J. Kvapil, G. Agakishiev, D. S. Gunarathne, Long Zhou, Subhasis Chattopadhyay, S. Horvat, D. Cebra, S. Trentalange, Zhanwen Zhu, Chong Kim, Y. K. Sun, Bernd Surrow, Brian Page, S. Siejka, Nu Xu, H. Z. Huang, A. V. Brandin, N. Elsey, D. Mayes, Janet Elizabeth Seger, Daniel Brown, Hal Spinka, I. M. Deppner, F. Videbæk, Norbert Herrmann, Rafal Sikora, Yuanjing Li, J. Rusnak, Zhongbin Xu, A. F. Kraishan, Vipul Bairathi, L. Zhang, L. Ruan, J. L. Romero, C. A. Gagliardi, J. Putschke, Yifei Zhang, Qian Yang, Richard Daniel Majka, Lukas Kramarik, T. Todoroki, Jana Bielcikova, Madan M. Aggarwal, Sooraj Krishnan Radhakrishnan, Fuqiang Wang, E. Finch, P. Federicova, J. H. Thomas, A. Ogawa, M. Tokarev, Yang Yang, K. Yip, D. K. Mishra, N. Kulathunga, J. L. Drachenberg, Yang Wu, Anik Gupta, P. Szymanski, P. Filip, H. H. Wieman, I. G. Bordyuzhin, Y. Fisyak, Olga Evdokimov, K. Oh, Muhammad Usman Ashraf, Xiangming Sun, D. Mallick, Frank Jm Geurts, B. Huang, A. Vossen, D. Kalinkin, T. Galatyuk, Gene Van Buren, O. D. Tsai, Z. Ye, Manuel Calderon De La Barca Sanchez, L. Didenko, I. Chakaberia, Cheng Li, D. Kapukchyan, G. Igo, Maowu Nie, L. Krauth, S. Heppelmann, A. Kechechyan, James Brandenburg, K. N. Barish, Xin Li, B. J. Summa, Fuwang Shen, Gang Wang, G. S. Averichev, Christina Markert, Bill Christie, K. Kauder, A. Taranenko, O. Rusnakova, P. Seyboth, Xiaozhi Bai, Jaroslav Adam, K. Meehan, S. B. Nurushev, J. Bryslawskyj, Z. Y. Zhang, T. Tarnowsky, H. S. Matis, T. Nonaka, Jindrich Lidrych, Jiangyong Jia, L. K. Kosarzewski, Xiaolong Chen, J. Lauret, Xianglei Zhu, Arabinda Behera, Kun Jiang, Jay Roberts, Song Zhang, Yaping Wang, A. A. Derevschikov, A. I. Hamad, Saskia Mioduszewski, Shusu Shi, Zebo Tang, Sedigheh Jowzaee, S. Stanislaus, L. Kochenda, Jan Vanek, Joseph Kwasizur, Dave Underwood, N. K. Pruthi, Qinghua Xu, F. Seck, Maksym Zyzak, E. Shahaliev, Declan Keane, K. Krueger, P. Federic, M. Sergeeva, I. Vassiliev, M. Posik, Jianping Cheng, G. Eppley, O. Eyser, Sergei A. Voloshin, J. W. Harris, R. Seto, Siwei Luo, J. Pluta, W. J. Llope, Wei Li, R. Witt, N. Chankova-Bunzarova, I. Bunzarov, O. Matonoha, Subhash Singha, Joseph Adams, Alexander Jentsch, Niseem Magdy Abdelwahab Abdelrahman, Zhigang Xiao, T. Huang, J. C. Dunlop, L. Wen, Rene Bellwied, S. Vokal, Yue Liang, Wei Xie, A. Attri, Wlodek Guryn, Y. Panebratsev, Isaac Mooney, Shenghui Zhang, Zubayer Ahammed, Norbert Schmitz, Derek Anderson, P. Huo, Saehanseul Oh, D. Grosnick, William Jacobs, N. G. Minaev, John Campbell, S. W. Wissink, Q. Y. Shou, Yi-Fei Xu, Sumit Kumar, R. Pak, Feng Liu, Roy A. Lacey, Hans Georg Ritter, R. Aoyama, Mariusz Przybycien, ShinIchi Esumi, Prithwish Tribedy, B. K. Srivastava, Shengli Huang, Samuel Heppelmann, Peifeng Liu, B. Tu, Yu-Gang Ma, Guannan Xie, R. Lednicky, Hanna Paulina Zbroszczyk, A. K. Bhati, Nikolai Smirnov, Xiaoping Zhang, Xu Sun, L. G. Efimov, Liang He, Ji Xu, F. G. Atetalla, Lanny Ray, H. Liu, David Stewart, Sevil Salur, T. G. Dedovich, H. Pei, N. Yu, Kejun Kang, L. V. Nogach, Isaac Upsal, Alexander Vasiliev, Tetsuro Sugiura, S. Kabana, Paul Sorensen, D. P. Kikola, B. Stringfellow, R. Fatemi, Todd Kinghorn, Ming Shao, M. Cherney, Rosi Reed, Lokesh Kumar, S. K. Tripathy, Rongrong Ma, Nihar Sahoo, X. C. Chen, Anthony Robert Timmins, Adam Ryszard Kisiel, J. Engelage, J. M. Landgraf, Dmitry Morozov, M. Strikhanov, J. Sandweiss, Nasim, Joel Anthony Mazer, Spiros Margetis, D. Tlusty, S. Das, Jing-Han Chen, Michal Sumbera, Catherine Tomkiel, Hank Crawford, P. Chaloupka, Ting Lin, A. H. Tang, Benjamin Schweid, T. J. Humanic, D. Arkhipkin, A. Hamed, Jesus Negrete, V. A. Okorokov, Lukas Holub, Bedangadas Mohanty, Robert E. Tribble, I. K. Yoo, M. M. Mondal, E. G. Judd, E. P. Sichtermann
Rok vydání: 2018
Předmět:
Zdroj: Physical Review C. 98
ISSN: 2469-9993
2469-9985
Popis: Global polarization of $\Lambda$ hyperons has been measured to be of the order of a few tenths of a percent in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV, with no significant difference between $\Lambda$ and $\bar{\Lambda}$. These new results reveal the collision energy dependence of the global polarization together with the results previously observed at $\sqrt{s_{_{NN}}}$ = 7.7 -- 62.4 GeV and indicate noticeable vorticity of the medium created in non-central heavy-ion collisions at the highest RHIC collision energy. The signal is in rough quantitative agreement with the theoretical predictions from a hydrodynamic model and from the AMPT (A Multi-Phase Transport) model. The polarization is larger in more peripheral collisions, and depends weakly on the hyperon's transverse momentum and pseudorapidity $\eta^H$ within $|\eta^H
Databáze: OpenAIRE