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Phys Rev Lett. 2009 Dec 18;103(25):251601. doi: 10.1103/PhysRevLett.103.251601. Epub 2009 Dec 14.

Azimuthal charged-particle correlations and possible local strong parity violation.

Physical review letters

B I Abelev, M M Aggarwal, Z Ahammed, A V Alakhverdyants, B D Anderson, D Arkhipkin, G S Averichev, J Balewski, O Barannikova, L S Barnby, S Baumgart, D R Beavis, R Bellwied, F Benedosso, M J Betancourt, R R Betts, A Bhasin, A K Bhati, H Bichsel, J Bielcik, J Bielcikova, B Biritz, L C Bland, I Bnzarov, B E Bonner, J Bouchet, E Braidot, A V Brandin, A Bridgeman, E Bruna, S Bueltmann, T P Burton, X Z Cai, H Caines, M Calderón de la Barca Sánchez, O Catu, D Cebra, R Cendejas, M C Cervantes, Z Chajecki, P Chaloupka, S Chattopadhyay, H F Chen, J H Chen, J Y Chen, J Cheng, M Cherney, A Chikanian, K E Choi, W Christie, P Chung, R F Clarke, M J M Codrington, R Corliss, T M Cormier, M R Cosentino, J G Cramer, H J Crawford, D Das, S Dash, M Daugherity, L C De Silva, T G Dedovich, M DePhillips, A A Derevschikov, R Derradi de Souza, L Didenko, P Djawotho, V Dzhordzhadze, S M Dogra, X Dong, J L Drachenberg, J E Draper, J C Dunlop, M R Dutta Mazumdar, L G Efimov, E Elhalhuli, M Elnimr, J Engelage, G Eppley, B Erazmus, M Estienne, L Eun, P Fachini, R Fatemi, J Fedorisin, A Feng, P Filip, E Finch, V Fine, Y Fisyak, C A Gagliardi, D R Gangadharan, M S Ganti, E J Garcia-Solis, A Geromitsos, F Geurts, V Ghazikhanian, P Ghosh, Y N Gorbunov, A Gordon, O Grebenyuk, D Grosnick, B Grube, S M Guertin, K S F F Guimaraes, A Gupta, N Gupta, W Guryn, B Haag, T J Hallman, A Hamed, J W Harris, M Heinz, S Heppelmann, A Hirsch, E Hjort, A M Hoffman, G W Hoffmann, D J Hofman, R S Hollis, H Z Huang, T J Humanic, L Huo, G Igo, A Iordanova, P Jacobs, W W Jacobs, P Jakl, C Jena, F Jin, C L Jones, P G Jones, J Joseph, E G Judd, S Kabana, K Kajimoto, K Kang, J Kapitan, K Kauder, D Keane, A Kechechyan, D Kettler, V Yu Khodyrev, D P Kikola, J Kiryluk, A Kisiel, S R Klein, A G Knospe, A Kocoloski, D D Koetke, J Konzer, M Kopytine, I Koralt, W Korsch, L Kotchenda, V Kouchpil, P Kravtsov, V I Kravtsov, K Krueger, M Krus, L Kumar, P Kurnadi, M A C Lamont, J M Landgraf, S LaPointe, J Lauret, A Lebedev, R Lednicky, C-H Lee, J H Lee, W Leight, M J LeVine, C Li, N Li, Y Li, G Lin, S J Lindenbaum, M A Lisa, F Liu, H Liu, J Liu, L Liu, T Ljubicic, W J Llope, R S Longacre, W A Love, Y Lu, T Ludlam, G L Ma, Y G Ma, D P Mahapatra, R Majka, O I Mall, L K Mangotra, R Manweiler, S Margetis, C Markert, H Masui, H S Matis, Yu A Matulenko, D McDonald, T S McShane, A Meschanin, R Milner, N G Minaev, S Mioduszewski, A Mischke, B Mohanty, D A Morozov, M G Munhoz, B K Nandi, C Nattrass, T K Nayak, J M Nelson, P K Netrakanti, M J Ng, L V Nogach, S B Nurushev, G Odyniec, A Ogawa, H Okada, V Okorokov, D Olson, M Pachr, B S Page, S K Pal, Y Pandit, Y Panebratsev, T Pawlak, T Peitzmann, V Perevoztchikov, C Perkins, W Peryt, S C Phatak, P Pile, M Planinic, M A Ploskon, J Pluta, D Plyku, N Poljak, A M Poskanzer, B V K S Potukuchi, D Prindle, C Pruneau, N K Pruthi, P R Pujahari, J Putschke, R Raniwala, S Raniwala, R L Ray, R Redwine, R Reed, A Ridiger, H G Ritter, J B Roberts, O V Rogachevskiy, J L Romero, A Rose, C Roy, L Ruan, M J Russcher, R Sahoo, S Sakai, I Sakrejda, T Sakuma, S Salur, J Sandweiss, J Schambach, R P Scharenberg, N Schmitz, J Seele, J Seger, I Selyuzhenkov, Y Semertzidis, P Seyboth, E Shahaliev, M Shao, M Sharma, S S Shi, X-H Shi, E P Sichtermann, F Simon, R N Singaraju, M J Skoby, N Smirnov, P Sorensen, J Sowinski, H M Spinka, B Srivastava, T D S Stanislaus, D Staszak, M Strikhanov, B Stringfellow, A A P Suaide, M C Suarez, N L Subba, M Sumbera, X M Sun, Y Sun, Z Sun, B Surrow, T J M Symons, A Szanto de Toledo, J Takahashi, A H Tang, Z Tang, L H Tarini, T Tarnowsky, D Thein, J H Thomas, J Tian, A R Timmins, S Timoshenko, D Tlusty, M Tokarev, V N Tram, S Trentalange, R E Tribble, O D Tsai, J Ulery, T Ullrich, D G Underwood, G Van Buren, G van Nieuwenhuizen, J A Vanfossen, R Varma, G M S Vasconcelos, A N Vasiliev, F Videbaek, Y P Viyogi, S Vokal, S A Voloshin, M Wada, M Walker, F Wang, G Wang, H Wang, J S Wang, Q Wang, X Wang, X L Wang, Y Wang, G Webb, J C Webb, G D Westfall, C Whitten, H Wieman, S W Wissink, R Witt, Y Wu, W Xie, N Xu, Q H Xu, Y Xu, Z Xu, Y Yang, P Yepes, K Yip, I-K Yoo, Q Yue, M Zawisza, H Zbroszczyk, W Zhan, S Zhang, W M Zhang, X P Zhang, Y Zhang, Z P Zhang, Y Zhao, C Zhong, J Zhou, X Zhu, R Zoulkarneev, Y Zoulkarneeva, J X Zuo,

Affiliations

  1. University of Illinois at Chicago, Chicago, Illinois 60607, USA.

PMID: 20366248 DOI: 10.1103/PhysRevLett.103.251601

Abstract

Parity-odd domains, corresponding to nontrivial topological solutions of the QCD vacuum, might be created during relativistic heavy-ion collisions. These domains are predicted to lead to charge separation of quarks along the system's orbital momentum axis. We investigate a three-particle azimuthal correlator which is a P even observable, but directly sensitive to the charge separation effect. We report measurements of charged hadrons near center-of-mass rapidity with this observable in Au + Au and Cu + Cu collisions at square root of s(NN) = 200 GeV using the STAR detector. A signal consistent with several expectations from the theory is detected. We discuss possible contributions from other effects that are not related to parity violation.

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