Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au + Au Collisions at s N N = 200 GeV

Journal Article · 01 March 2022 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.128.092301 · OSTI ID:1805247

Abdallah, M.  S.; Adam, J.; Adamczyk, L.; Adams, J.  R.; Adkins, J.  K.; Agakishiev, G.; Aggarwal, I.; Aggarwal, M.  M.; Ahammed, Z.; Alekseev, I.; Anderson, D.  M.; Aparin, A.; Aschenauer, E.  C.; Ashraf, M.  U.; Atetalla, F.  G.; Attri, A.; Averichev, G.  S.; Bairathi, V.; Baker, W.; Ball Cap, J.  G. ; Barish, K.; Behera, A.; Bellwied, R.; Bhagat, P.; Bhasin, A.; Bielcik, J.; Bielcikova, J.; Bordyuzhin, I.  G.; Brandenburg, J.  D.; Brandin, A.  V.; Bunzarov, I.; Butterworth, J.; Cai, X.  Z.; Caines, H.; Calderón de la Barca Sánchez, M.; Cebra, D.; Chakaberia, I.; Chaloupka, P.; Chan, B.  K.; Chang, F-H; Chang, Z.; Chankova-Bunzarova, N.; Chatterjee, A.; Chattopadhyay, S.; Chen, D.; Chen, J.; Chen, J.  H.; Chen, X.; Chen, Z.; Cheng, J.; Chevalier, M.; Choudhury, S.; Christie, W.; Chu, X.; Crawford, H.  J.; Csanád, M.; Daugherity, M.; Dedovich, T.  G.; Deppner, I.  M.; Derevschikov, A.  A.; Dhamija, A.; Di Carlo, L.; Didenko, L.; Dong, X.; Drachenberg, J.  L.; Dunlop, J.  C.; Elsey, N.; Engelage, J.; Eppley, G.; Esumi, S.; Ewigleben, A.; Eyser, O.; Fatemi, R.; Fawzi, F.  M.; Fazio, S.; Federic, P.; Fedorisin, J.; Feng, C.  J.; Feng, Y.; Filip, P.; Finch, E.; Fisyak, Y.; Francisco, A.; Fu, C.; Fulek, L.; Gagliardi, C.  A.; Galatyuk, T.; Geurts, F.; Ghimire, N.; Gibson, A.; Gopal, K.; Gou, X.; Grosnick, D.; Gupta, A.; Guryn, W.; Hamad, A.  I.; Hamed, A.; Han, Y.; Harabasz, S.; Harasty, M.  D.; Harris, J.  W.; Harrison, H.; He, S.; He, W.; He, X.  H.; He, Y.; Heppelmann, S.; Heppelmann, S.; Herrmann, N.; Hoffman, E.; Holub, L.; Hu, Y.; Huang, H.; Huang, H.  Z.; Huang, S.  L.; Huang, T.; Huang, X.; Huang, Y.; Humanic, T.  J.; Igo, G.; Isenhower, D.; Jacobs, W.  W.; Jena, C.; Jentsch, A.; Ji, Y.; Jia, J.; Jiang, K.; Ju, X.; Judd, E.  G.; Kabana, S.; Kabir, M.  L.; Kagamaster, S.; Kalinkin, D.; Kang, K.; Kapukchyan, D.; Kauder, K.; Ke, H.  W.; Keane, D.; Kechechyan, A.; Khyzhniak, Y.  V.; Kikoła, D.  P.; Kim, C.; Kimelman, B.; Kincses, D.; Kisel, I.; Kiselev, A.; Knospe, A.  G.; Kochenda, L.; Kosarzewski, L.  K.; Kramarik, L.; Kravtsov, P.; Kumar, L.; Kumar, S.; Kunnawalkam Elayavalli, R.; Kwasizur, J.  H.; Lan, S.; Landgraf, J.  M.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, J.  H.; Leung, Y.  H.; Li, C.; Li, C.; Li, W.; Li, X.; Li, Y.; Liang, X.; Liang, Y.; Licenik, R.; Lin, T.; Lin, Y.; Lisa, M.  A.; Liu, F.; Liu, H.; Liu, H.; Liu, P.; Liu, T.; Liu, X.; Liu, Y.; Liu, Z.; Ljubicic, T.; Llope, W.  J.; Longacre, R.  S.; Loyd, E.; Lukow, N.  S.; Luo, X.; Ma, L.; Ma, R.; Ma, Y.  G.; Magdy, N.; Majka, R.; Mallick, D.; Margetis, S.; Markert, C.; Matis, H.  S.; Mazer, J.  A.; Minaev, N.  G.; Mioduszewski, S.; Mohanty, B.; Mondal, M.  M.; Mooney, I.; Morozov, D.  A.; Mukherjee, A.; Nagy, M.; Nam, J.  D.; Nasim, Md; Nayak, K.; Neff, D.; Nelson, J.  M.; Nemes, D.  B.; Nie, M.; Nigmatkulov, G.; Niida, T.; Nishitani, R.; Nogach, L.  V.; Nonaka, T.; Nunes, A.  S.; Odyniec, G.; Ogawa, A.; Oh, S.; Okorokov, V.  A.; Page, B.  S.; Pak, R.; Pandav, A.; Pandey, A.  K.; Panebratsev, Y.; Parfenov, P.; Pawlik, B.; Pawlowska, D.; Pei, H.; Perkins, C.; Pinsky, L.; Pintér, R.  L.; Pluta, J.; Pokhrel, B.  R.; Ponimatkin, G.; Porter, J.; Posik, M.; Prozorova, V.; Pruthi, N.  K.; Przybycien, M.; Putschke, J.; Qiu, H.; Quintero, A.; Racz, C.; Radhakrishnan, S.  K.; Raha, N.; Ray, R.  L.; Reed, R.; Ritter, H.  G.; Robotkova, M.; Rogachevskiy, O.  V.; Romero, J.  L.; Ruan, L.; Rusnak, J.; Sahoo, N.  R.; Sako, H.; Salur, S.; Sandweiss, J.; Sato, S.; Schmidke, W.  B.; Schmitz, N.; Schweid, B.  R.; Seck, F.; Seger, J.; Sergeeva, M.; Seto, R.; Seyboth, P.; Shah, N.; Shahaliev, E.; Shanmuganathan, P.  V.; Shao, M.; Shao, T.; Sheikh, A.  I.; Shen, D.; Shi, S.  S.; Shi, Y.; Shou, Q.  Y.; Sichtermann, E.  P.; Sikora, R.; Simko, M.; Singh, J.; Singha, S.; Skoby, M.  J.; Smirnov, N.; Söhngen, Y.; Solyst, W.; Sorensen, P.; Spinka, H.  M.; Srivastava, B.; Stanislaus, T.  D. S.; Stefaniak, M.; Stewart, D.  J.; Strikhanov, M.; Stringfellow, B.; Suaide, A.  A. P.; Sumbera, M.; Summa, B.; Sun, X.  M.; Sun, X.; Sun, Y.; Sun, Y.; Surrow, B.; Svirida, D.  N.; Sweger, Z.  W.; Szymanski, P.; Tang, A.  H.; Tang, Z.; Taranenko, A.; Tarnowsky, T.; Thomas, J.  H.; Timmins, A.  R.; Tlusty, D.; Todoroki, T.; Tokarev, M.; Tomkiel, C.  A.; Trentalange, S.; Tribble, R.  E.; Tribedy, P.; Tripathy, S.  K.; Truhlar, T.; Trzeciak, B.  A.; Tsai, O.  D.; Tu, Z.; Ullrich, T.; Underwood, D.  G.; Upsal, I.; Van Buren, G.; Vanek, J.; Vasiliev, A.  N.; Vassiliev, I.; Verkest, V.; Videbæk, F.; Vokal, S.; Voloshin, S.  A.; Wang, F.; Wang, G.; Wang, J.  S.; Wang, P.; Wang, Y.; Wang, Y.; Wang, Z.; Webb, J.  C.; Weidenkaff, P.  C.; Wen, L.; Westfall, G.  D.; Wieman, H.; Wissink, S.  W.; Wu, J.; Wu, Y.; Xi, B.; Xiao, Z.  G.; Xie, G.; Xie, W.; Xu, H.; Xu, N.; Xu, Q.  H.; Xu, Y.; Xu, Z.; Xu, Z.; Yang, C.; Yang, Q.; Yang, S.; Yang, Y.; Ye, Z.; Ye, Z.; Yi, L.; Yip, K.; Yu, Y.; Zbroszczyk, H.; Zha, W.; Zhang, C.; Zhang, D.; Zhang, S.; Zhang, S.; Zhang, X.  P.; Zhang, Y.; Zhang, Y.; Zhang, Y.; Zhang, Z.  J.; Zhang, Z.; Zhang, Z.; Zhao, J. ; Zhou, C.; Zhu, X.; Zhu, Z.; Zurek, M.; Zyzak, M.

The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have different sensitivities to the spectator and participant planes, and could thus be determined by measurements with respect to these planes. We report such measurements in Au+Au collisions at a nucleon-nucleon center-of-mass energy of 200 GeV at the Relativistic Heavy-Ion Collider. It is found that the charge separation, with the flow background removed, is consistent with zero in peripheral (large impact parameter) collisions. Some indication of finite CME signals is seen with a significance of 1–3 standard deviations in mid-central (intermediate impact parameter) collisions. Furthermore, significant residual background effects may, however, still be present.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Purdue Univ., West Lafayette, IN (United States); Texas A & M Univ., College Station, TX (United States); Univ. of California, Los Angeles, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP)
• Contributing Organization: STAR Collaboration
• Grant/Contract Number: AC02-05CH11231; FG02-88ER40424; SC0012704; SC0012910; SC0017982
• OSTI ID: 1805247
• Report Number(s): BNL-221750-2021-JAAM
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 128; ISSN 0031-9007
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English