在\(\sqrt{s_{NN}} = 200\) GeV的金离子与金离子碰撞中，通过相对于旁观粒子平面和参与粒子平面的电荷相关方位角关联来寻找手征磁效应。
Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au+Au Collisions at sqrt[s_{NN}]=200 GeV.
作者信息
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
机构信息
American University of Cairo, New Cairo 11835, New Cairo, Egypt.
Brookhaven National Laboratory, Upton, New York 11973.
出版信息
Phys Rev Lett. 2022 Mar 4;128(9):092301. doi: 10.1103/PhysRevLett.128.092301.
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 in midcentral (intermediate impact parameter) collisions. Significant residual background effects may, however, still be present.
手征磁效应（CME）是指在量子色动力学中，由于局部宇称和电荷宇称破坏区域内夸克手征性失衡，导致电荷沿强磁场方向分离。由于椭圆方位角各向异性产生的主要本底的存在，使得电荷分离的实验测量变得困难。这种本底和CME信号对旁观粒子平面和参与粒子平面具有不同的灵敏度，因此可以通过相对于这些平面的测量来确定。我们报告了在相对论重离子对撞机上，质心能量为200 GeV的金离子与金离子碰撞中的此类测量结果。研究发现，在周边（大碰撞参数）碰撞中，去除流本底后的电荷分离与零相符。在中中心（中等碰撞参数）碰撞中，可以看到有限CME信号的一些迹象。然而，可能仍然存在显著的残余本底效应。
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