Open Access

Mohamed Samy Abdallah, Bassam Aboona, Jaroslav Adam, Leszek Adamczyk, J. R. Adams, J. Kevin Adkins, Geydar Agakishiev, Ishu Aggarwal, Madan Mohan Aggarwal, Zubayer Ahammed, Igor G. Alekseev, Derek M. Anderson, Alexey Aparin, Elke Caroline Aschenauer, Muhammad Usman Ashraf, F. G. Atetalla, Anjali Attri, Georgy S. Averichev, Vipul Bairathi, W. Baker, Jonathan Gonzalo Ball Cap, Kenneth Barish, Arabinda Behera, Rene Bellwied, Pratibha Bhagat, Anju Bhasin, Jaroslav Bielčík, Jana Bielčíková, Igor G. Bordyuzhin, James D. Brandenburg, Andrei V. Brandin, Ivan Bunzarov, Xiang-Zhou Cai, Helen Louise Caines, Manuel Calderón de la Barca Sánchez, Daniel A. Cebra, Irakli Chakaberia, Petr Chaloupka, B. K. Chan, F-H. Chang, Z. Chang, N. Chankova-Bunzarova, A. Chatterjee, S. Chattopadhyay, D. Chen, J. Chen, J. H. Chen, X. Chen, Z. Chen, J. Cheng, M. Chevalier, Subikash Choudhury, William Christie, Xiaoxuan Chu, Henry J. Crawford, Máté Csanád, M. Daugherity, T. G. Dedovich, Ingo Martin Deppner, Anatoly A. Derevschikov, A. Dhamija, L. Di Carlo, Lidia Didenko, Prabhupada Dixit, X. Dong, James Lucus Drachenberg, Emilie Duckworth, James C. Dunlop, Nicholas Elsey, Jon M. Engelage, Geary Wareham Eppley, ShinIchi Esumi, Olga Y. Evdokimov, A. Ewigleben, Kjeld Oleg Eyser, Renee H. Fatemi, F. M. Fawzi, Salvatore Fazio, Pavol Federič, Jan Fedorišin, C. J. Feng, Yicheng Feng, Peter Filip, Evan Finch, Yuri V. Fisyak, Audrey Francisco, C. Fu, Łukasz Fulek, Carl A. Gagliardi, Tetyana Galatyuk, Frank Geurts, Navagyan Ghimire, Adam Gibson, Krishan Gopal, X. Gou, David P. Grosnick, Anik Gupta, Włodzimierz Guryn, A. I. Hamad, Ahmed M. Hamed, Y. Han, Szymon Harabasz, Matthew D. Harasty, John W. Harris, Hannah Harrison, S. He, W. He, X. H. He, Y. He, S. Heppelmann, S. Heppelmann, Norbert Herrmann, E. Hoffman, Lukáš Holub, Y. Hu, H. Huang, Huan Zhong Huang, Shengli Huang, T. Huang, X. Huang, Y. Huang, Thomas J. Humanic, George J. Igo, D. Isenhower, William W. Jacobs, Chitrasen Jena, Alexander Jentsch, Yuanjing Ji, Jiangyong Jia, K. Jiang, Xin-Yue Ju, Eleanor G. Judd, Sonia Kabana, M. L. Kabir, Skipper Kagamaster, Dmitry Kalinkin, K. Kang, David Kapukchyan, Kolja Kauder, Hongwei Ke, Declan Keane, Armen Kechechyan, Matthew Kelsey, Yevheniia V. Khyzhniak, Daniel P. Kikoła, C. Kim, B. Kimelman, D. Kincses, Ivan Kisel, A. Kiselev, Anders Garritt Knospe, H. S. Ko, L. M. Kočenda, Leszek Krzysztof Kosarzewski, L. Kramarik, Peter Kravtsov, Lokesh Kumar, Shyam Kumar, R. Kunnawalkam Elayavalli, Joseph H. Kwasizur, Roy Alphanso Lacey, Shaowei Lan, Jeffery M. Landgraf, Jerome Lauret, Alexei Lebedev, Richard Lednicky, J. H. Lee, Y. H. Leung, C. Li, C. Li, W. Li, X. Li, Y. Li, X. Liang, Y. Liang, Robert Licenik, T. Lin, Y. Lin, Michael A. Lisa, F. Liu, H. Liu, H. Liu, P. Liu, T. Liu, X. Liu, Y. Liu, Z. Liu, Tonko A. Ljubicic, William Joseph Llope, Ronald S. Longacre, E. Loyd, N. S. Lukow, X. F. Luo, L. Ma, R. Ma, Yu-Gang Ma, Niseem Magdy Abdelwahab Abdelrahman, Dukhishyam Mallick, Spyridon Margetis, Christina Markert, Howard S. Matis, Joel Anthony Mazer, Nikolai G. Minaev, Saskia Mioduszewski, Bedangadas Mohanty, Mriganka Mouli Mouli, Isaac A. Mooney, Dmitry A. Morozov, A. Mukherjee, M. Nagy, J. D. Nam, Md. Nasim, Kishora Nayak, D. Neff, John M. Nelson, Daniel B. Nemes, M. Nie, Grigory A. Nigmatkulov, Takafumi Niida, R. Nishitani, Larisa V. Nogach, Toshihiro Nonaka, A. S. Nunes, Grazyna Janina Odyniec, Akio Ogawa, Saehanseul Oh, Vitaly A. Okorokov, Brian S. Page, Robert Pak, Jinjin Pan, Ashish Pandav, Ashutosh Kumar Pandey, Yuri Panebratsev, P. Parfenov, Bogdan Pawlik, Diana Pawłowska, Chris Perkins, Lawrence Pinsky, Roland Laszlo Pintér, Jan Marian Pluta, B. R. Pokhrel, G. Ponimatkin, Jeffrey Brent Porter, Matthew Posik, V. Prozorova, Navneet Kumar Pruthi, Mariusz Przybycien, Jörn H. Putschke, H. Qiu, Amilkar Quintero, Cameron Racz, Sooraj Krishnan Radhakrishnan, N. Raha, Robert L. Ray, Rosi Jan Reed, Hans Georg Ritter, Monika Robotkova, Oleg V. Rogačevskij, Juan L. Romero, D. Roy, L. Ruan, Jan Rusnak, A. K. Sahoo, Nihar Ranjan Sahoo, H. Sako, Sevil Salur, Jack H. Sandweiss, Susumu Sato, William B. Schmidke, Norbert Schmitz, Benjamin R. Schweid, Florian Seck, Janet Elizabeth Seger, Maria Sergeeva, Richard Seto, Peter Seyboth, N. Shah, Ehtiram Shahaliev, Prashanth V. Shanmuganathan, M. Shao, T. Shao, Ashik Ikbal Sheikh, D. Y. Shen, Shusu Shi, Y. Shi, Q. Y. Shou, Ernst P. Sichtermann, Rafał Sikora, Miroslav Šimko, J. Singh, Subhash Singha, Michael J. Skoby, Nikolai Smirnov, Yannick Söhngen, William Solyst, Paul Richard Sorensen, Harold. M. Spinka, B. Srivastava, T. D. Shirvel Stanislaus, Maria Stefaniak, David J. Stewart, Michail Nikolaevič Strichanov, Blair Stringfellow, Alexandre Alarcon do Passo Suaide, Michal Šumbera, Branden Summa, X. M. Sun, X. Sun, Y. Sun, Y. Sun, Bernd Surrow, Dmitry N. Svirida, Zachary W. Sweger, Paweł Szymański, Aihong Tang, Zebo Tang, Arkadiy Taranenko, Terence J. Tarnowsky, James H. Thomas, Anthony Robert Timmins, David Tlusty, Takahito Todoroki, Mikhail V. Tokarev, C. A. Tomkiel, Stephen Trentalange, Robert E. Tribble, Prithwish Tribedy, Srikanta Kumar Tripathy, Tomas Truhlar, Barbara Antonina Trzeciak, Oleg D. Tsai, Zhoudunming Tu, Thomas Ullrich, David G. Underwood, Isaac Upsal, Gene Van Buren, Jan Vanek, Alexander Nikolaevich Vasiliev, Iouri Vassiliev, Veronica Verkest, Flemming Videbæk, Stanislav Vokal, Sergei Voloshin, F. Wang, G. Wang, J. S. Wang, P. Wang, Y. Wang, Y. Wang, Z. Wang, Jason C. Webb, Philipp Weidenkaff, L. Wen, Gary D. Westfall, Howard Wieman, Scott W. Wissink, J. Wu, J. Wu, Y. Wu, B. Xi, Z. G. Xiao, Guannan Xie, W. Xie, H. Xu, N. Xu, Q. H. Xu, Y. Xu, Z. Xu, Z. Xu, C. Yang, Q. Yang, S. Yang, Y. Yang, Z. Ye, Z. Ye, L. Yi, K. Yip, Y. Yu, Hanna Paulina Zbroszczyk, Wangmei Zha, C. Zhang, D. Zhang, J. Zhang, S. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Y. Zhang, Y. Zhang, Z. J. Zhang, Z. Zhang, Z. Zhang, J. Zhao, C. Zhou, X. Zhu, Maria Katarzyna Żurek, Maksym Zyzak

• The chiral magnetic effect (CME) is predicted to occur as a consequence of a local violation of P and CP symmetries of the strong interaction amidst a strong electro-magnetic field generated in relativistic heavy-ion collisions. Experimental manifestation of the CME involves a separation of positively and negatively charged hadrons along the direction of the magnetic field. Previous measurements of the CME-sensitive charge-separation observables remain inconclusive because of large background contributions. In order to better control the influence of signal and backgrounds, the STAR Collaboration performed a blind analysis of a large data sample of approximately 3.8 billion isobar collisions of 9644Ru+9644Ru and 9640Zr+9640Zr at sNN−−−√=200 GeV. Prior to the blind analysis, the CME signatures are predefined as a significant excess of the CME-sensitive observables in Ru+Ru collisions over those in Zr+Zr collisions, owing to a larger magnetic field in the former. A precision down to 0.4% is achieved, as anticipated, in the relative magnitudes of the pertinent observables between the two isobar systems. Observed differences in the multiplicity and flow harmonics at the matching centrality indicate that the magnitude of the CME background is different between the two species. No CME signature that satisfies the predefined criteria has been observed in isobar collisions in this blind analysis.