Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in sNN=200GeV Au+Au collisions

N. M. Abdelwahab, L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, C. D. Anson, A. Aparin, D. Arkhipkin, E. C. Aschenauer, G. S. Averichev, A. Banerjee, D. R. Beavis, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. BielcikJ. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, S. Bültmann, I. Bunzarov, T. P. Burton, J. Butterworth, H. Caines, Calderón M. de la Barca Sánchez, J. M. Campbell, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, M. J.M. Codrington, G. Contin, J. G. Cramer, H. J. Crawford, X. Cui, S. Das, A. Davila Leyva, L. C. DeSilva, R. R. Debbe, T. G. Dedovich, J. Deng, A. A. Derevschikov, R. Derradi de Souza, B. di Ruzza, L. Didenko, C. Dilks, F. Ding, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, J. Engelage, K. S. Engle, G. Eppley, L. Eun, O. Evdokimov, O. Eyser, R. Fatemi, S. Fazio, J. Fedorisin, P. Filip, Y. Fisyak, C. E. Flores, C. A. Gagliardi, D. R. Gangadharan, D. Garand, F. Geurts, A. Gibson, M. Girard, S. Gliske, L. Greiner, D. Grosnick, D. S. Gunarathne, Y. Guo, A. Gupta, S. Gupta, W. Guryn, B. Haag, A. Hamed, L. X. Han, R. Haque, J. W. Harris, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, X. Huang, P. Huck, T. J. Humanic, G. Igo, W. W. Jacobs, H. Jang, E. G. Judd, S. Kabana, D. Kalinkin, K. Kang, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, Z. H. Khan, D. P. Kikola, I. Kisel, A. Kisiel, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. K. Kosarzewski, L. Kotchenda, 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, C. Li, W. Li, X. Li, X. Li, Y. Li, Z. M. Li, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, M. Lomnitz, R. S. Longacre, X. Luo, G. L. Ma, Y. G. Ma, D. P. Mahapatra, R. Majka, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, N. G. Minaev, S. Mioduszewski, B. Mohanty, M. M. Mondal, D. A. Morozov, M. K. Mustafa, B. K. Nandi, M. Nasim, T. K. Nayak, J. M. Nelson, G. Nigmatkulov, L. V. Nogach, S. Y. Noh, J. Novak, S. B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, D. L. OlvittJr, B. S. Page, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, P. Pile, M. Planinic, J. Pluta, N. Poljak, K. Poniatowska, J. Porter, A. M. Poskanzer, N. K. Pruthi, M. Przybycien, J. Putschke, H. Qiu, A. Quintero, S. Ramachandran, R. Raniwala, S. Raniwala, R. L. Ray, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, A. Roy, L. Ruan, J. Rusnak, O. Rusnakova, N. R. Sahoo, P. K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, 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, W. Q. Shen, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, M. Simko, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, H. M. Spinka, B. Srivastava, T. D.S. Stanislaus, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, M. Sumbera, X. Sun, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J.M. Symons, M. A. Szelezniak, J. Takahashi, A. H. Tang, Z. Tang, T. Tarnowsky, J. H. Thomas, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, M. Vandenbroucke, J. A. VanfossenJr, R. Varma, G. M.S. Vasconcelos, A. N. Vasiliev, R. Vertesi, F. Videbæk, Y. P. Viyogi, S. Vokal, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, X. L. Wang, Y. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, H. Wieman, S. W. Wissink, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, J. Xu, N. Xu, Q. H. Xu, Y. Xu, Z. Xu, W. Yan, C. Yang, Y. Yang, Y. Yang, Z. Ye, P. Yepes, L. Yi, K. Yip, I. K. Yoo, N. Yu, H. Zbroszczyk, W. Zha, J. B. Zhang, J. L. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, Y. Zoulkarneeva, M. Zyzak

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A data-driven method was applied to Au+Au collisions at sNN=200GeV made with the STAR detector at RHIC to isolate pseudorapidity distance δη-dependent and δη-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a δη-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity |η|<1. In 20-30% central Au+Au collisions, the relative flow fluctuation was found to be 34%±2%(stat.)±3%(sys.) for particles with transverse momentum pT less than 2 GeV/c. The δη-dependent part, attributed to nonflow correlations, is found to be 5%±2%(sys.) relative to the flow of the measured second harmonic cumulant at |δη|>0.7.

Original languageEnglish
Pages (from-to)40-47
Number of pages8
JournalPhysics Letters B
Volume745
DOIs
StatePublished - May 8 2015
Externally publishedYes

Funding

We thank the RHIC Operations Group and RCF at BNL , the NERSC Center at LBNL , the KISTI Center in Korea, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Offices of NP and HEP within the U.S. DOE Office of Science , the U.S. NSF , CNRS/IN2P3 , FAPESP CNPq of Brazil, the Ministry of Education and Science of the Russian Federation , NNSFC , CAS , MoST and MoE of China, the Korean Research Foundation , GA and MSMT of the Czech Republic, FIAS of Germany, DAE , DST , and CSIR of India, the National Science Centre of Poland, National Research Foundation ( NRF-2012004024 ), the Ministry of Science, Education and Sports of the Republic of Croatia, and RosAtom of Russia.

FundersFunder number
FAPESP CNPq
MOE of China
RosAtom of Russia
National Science FoundationCNRS/IN2P3, 1067907
National Science Foundation
Office of Science
National Research FoundationNRF-2012004024
National Research Foundation
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
Department of Atomic Energy, Government of India
National Natural Science Foundation of China
Ministerstvo Školství, Mládeže a Tělovýchovy
Chinese Academy of Sciences
Ministarstvo Obrazovanja, Znanosti i Sporta
Ministry of Education and Science of the Russian Federation
Narodowe Centrum Nauki
Ministry of Science and Technology, Taiwan

    Keywords

    • Flow
    • Heavy-ion
    • Nonflow

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