Phys. Rev. Lett.
102,
052302
(2009)
[7 pages]
Indications of Conical Emission of Charged Hadrons at the BNL Relativistic Heavy Ion Collider
B. I. Abelev et al. STAR Collaboration
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B. I. Abelev9, M. M. Aggarwal30, Z. Ahammed46, B. D. Anderson19, D. Arkhipkin13, G. S. Averichev12, Y. Bai28, J. Balewski23, O. Barannikova9, L. S. Barnby2, J. Baudot17, S. Baumgart51, D. R. Beavis3, R. Bellwied49, F. Benedosso28, R. R. Betts9, S. Bhardwaj35, A. Bhasin18, A. K. Bhati30, H. Bichsel48, J. Bielcik11, J. Bielcikova11, B. Biritz6, L. C. Bland3, M. Bombara2, B. E. Bonner36, M. Botje28, J. Bouchet19, E. Braidot28, A. V. Brandin26, E. Bruna51, S. Bueltmann3, T. P. Burton2, M. Bystersky11, X. Z. Cai39, H. Caines51, M. Calderón de la Barca Sánchez5, J. Callner9, O. Catu51, D. Cebra5, R. Cendejas6, M. C. Cervantes41, Z. Chajecki29, P. Chaloupka11, S. Chattopadhyay46, H. F. Chen38, J. H. Chen39, J. Y. Chen50, J. Cheng43, M. Cherney10, A. Chikanian51, K. E. Choi34, W. Christie3, S. U. Chung3, R. F. Clarke41, M. J. M. Codrington41, J. P. Coffin17, T. M. Cormier49, M. R. Cosentino37, J. G. Cramer48, H. J. Crawford4, D. Das5, S. Dash14, M. Daugherity42, C. De Silva49, M. M. de Moura37, T. G. Dedovich12, M. DePhillips3, A. A. Derevschikov32, R. Derradi de Souza7, L. Didenko3, P. Djawotho16, S. M. Dogra18, X. Dong22, J. L. Drachenberg41, J. E. Draper5, F. Du51, J. C. Dunlop3, M. R. Dutta Mazumdar46, W. R. Edwards22, L. G. Efimov12, E. Elhalhuli2, M. Elnimr49, V. Emelianov26, J. Engelage4, G. Eppley36, B. Erazmus40, M. Estienne17, L. Eun31, P. Fachini3, R. Fatemi20, J. Fedorisin12, A. Feng50, P. Filip13, E. Finch51, V. Fine3, Y. Fisyak3, C. A. Gagliardi41, L. Gaillard2, D. R. Gangadharan6, M. S. Ganti46, E. Garcia-Solis9, V. Ghazikhanian6, P. Ghosh46, Y. N. Gorbunov10, A. Gordon3, O. Grebenyuk22, D. Grosnick45, B. Grube34, S. M. Guertin6, K. S. F. F. Guimaraes37, A. Gupta18, N. Gupta18, W. Guryn3, B. Haag5, T. J. Hallman3, A. Hamed41, J. W. Harris51, W. He16, M. Heinz51, S. Heppelmann31, B. Hippolyte17, A. Hirsch33, E. Hjort22, A. M. Hoffman23, G. W. Hoffmann42, D. J. Hofman9, R. S. Hollis9, H. Z. Huang6, T. J. Humanic29, G. Igo6, A. Iordanova9, P. Jacobs22, W. W. Jacobs16, P. Jakl11, F. Jin39, P. G. Jones2, J. Joseph19, E. G. Judd4, S. Kabana40, K. Kajimoto42, K. Kang43, J. Kapitan11, M. Kaplan8, D. Keane19, A. Kechechyan12, D. Kettler48, V. Yu. Khodyrev32, J. Kiryluk22, A. Kisiel29, S. R. Klein22, A. G. Knospe51, A. Kocoloski23, D. D. Koetke45, M. Kopytine19, L. Kotchenda26, V. Kouchpil11, P. Kravtsov26, V. I. Kravtsov32, K. Krueger1, M. Krus11, C. Kuhn17, L. Kumar30, P. Kurnadi6, M. A. C. Lamont3, J. M. Landgraf3, S. LaPointe49, J. Lauret3, A. Lebedev3, R. Lednicky13, C-H. Lee34, M. J. LeVine3, C. Li38, Y. Li43, G. Lin51, X. Lin50, S. J. Lindenbaum27, M. A. Lisa29, F. Liu50, H. Liu5, J. Liu36, L. Liu50, T. Ljubicic3, W. J. Llope36, R. S. Longacre3, W. A. Love3, Y. Lu38, T. Ludlam3, D. Lynn3, G. L. Ma39, Y. G. Ma39, D. P. Mahapatra14, R. Majka51, O. I. Mall5, L. K. Mangotra18, R. Manweiler45, S. Margetis19, C. Markert42, H. S. Matis22, Yu. A. Matulenko32, T. S. McShane10, A. Meschanin32, J. Millane23, M. L. Miller23, N. G. Minaev32, S. Mioduszewski41, A. Mischke28, J. Mitchell36, B. Mohanty46, L. Molnar33, D. A. Morozov32, M. G. Munhoz37, B. K. Nandi15, C. Nattrass51, T. K. Nayak46, J. M. Nelson2, C. Nepali19, P. K. Netrakanti33, M. J. Ng4, L. V. Nogach32, S. B. Nurushev32, G. Odyniec22, A. Ogawa3, H. Okada3, V. Okorokov26, D. Olson22, M. Pachr11, B. S. Page16, S. K. Pal46, Y. Pandit19, Y. Panebratsev12, T. Pawlak47, T. Peitzmann28, V. Perevoztchikov3, C. Perkins4, W. Peryt47, S. C. Phatak14, M. Planinic52, J. Pluta47, N. Poljak52, A. M. Poskanzer22, B. V. K. S. Potukuchi18, D. Prindle48, C. Pruneau49, N. K. Pruthi30, J. Putschke51, R. Raniwala35, S. Raniwala35, R. L. Ray42, R. Reed5, A. Ridiger26, H. G. Ritter22, J. B. Roberts36, O. V. Rogachevskiy12, J. L. Romero5, A. Rose22, C. Roy40, L. Ruan3, M. J. Russcher28, V. Rykov19, R. Sahoo40, I. Sakrejda22, T. Sakuma23, S. Salur22, J. Sandweiss51, M. Sarsour41, J. Schambach42, R. P. Scharenberg33, N. Schmitz24, J. Seger10, I. Selyuzhenkov16, P. Seyboth24, A. Shabetai17, E. Shahaliev12, M. Shao38, M. Sharma49, S. S. Shi50, X-H. Shi39, E. P. Sichtermann22, F. Simon24, R. N. Singaraju46, M. J. Skoby33, N. Smirnov51, R. Snellings28, P. Sorensen3, J. Sowinski16, H. M. Spinka1, B. Srivastava33, A. Stadnik12, T. D. S. Stanislaus45, D. Staszak6, M. Strikhanov26, B. Stringfellow33, A. A. P. Suaide37, M. C. Suarez9, N. L. Subba19, M. Sumbera11, X. M. Sun22, Y. Sun38, Z. Sun21, B. Surrow23, T. J. M. Symons22, A. Szanto de Toledo37, J. Takahashi7, A. H. Tang3, Z. Tang38, T. Tarnowsky33, D. Thein42, J. H. Thomas22, J. Tian39, A. R. Timmins2, S. Timoshenko26, D. Tlusty11, M. Tokarev12, T. A. Trainor48, V. N. Tram22, A. L. Trattner4, S. Trentalange6, R. E. Tribble41, O. D. Tsai6, J. Ulery33, T. Ullrich3, D. G. Underwood1, G. Van Buren3, M. van Leeuwen28, A. M. Vander Molen25, J. A. Vanfossen, Jr.19, R. Varma15, G. M. S. Vasconcelos7, I. M. Vasilevski13, A. N. Vasiliev32, F. Videbaek3, S. E. Vigdor16, Y. P. Viyogi14, S. Vokal12, S. A. Voloshin49, M. Wada42, W. T. Waggoner10, F. Wang33, G. Wang6, J. S. Wang21, Q. Wang33, X. Wang43, X. L. Wang38, Y. Wang43, J. C. Webb45, G. D. Westfall25, C. Whitten, Jr.6, H. Wieman22, S. W. Wissink16, R. Witt44, Y. Wu50, N. Xu22, Q. H. Xu22, Y. Xu38, Z. Xu3, P. Yepes36, I-K. Yoo34, Q. Yue43, M. Zawisza47, H. Zbroszczyk47, W. Zhan21, H. Zhang3, S. Zhang39, W. M. Zhang19, Y. Zhang38, Z. P. Zhang38, Y. Zhao38, C. Zhong39, J. Zhou36, R. Zoulkarneev13, Y. Zoulkarneeva13, and J. X. Zuo39 (STAR Collaboration)
1Argonne National Laboratory, Argonne, Illinois 60439, USA
2University of Birmingham, Birmingham, United Kingdom
3Brookhaven National Laboratory, Upton, New York 11973, USA
4University of California, Berkeley, California 94720, USA
5University of California, Davis, California 95616, USA
6University of California, Los Angeles, California 90095, USA
7Universidade Estadual de Campinas, Sao Paulo, Brazil
8Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
9University of Illinois at Chicago, Chicago, Illinois 60607, USA
10Creighton University, Omaha, Nebraska 68178, USA
11Nuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech Republic
12Laboratory for High Energy (JINR), Dubna, Russia
13Particle Physics Laboratory (JINR), Dubna, Russia
14Institute of Physics, Bhubaneswar 751005, India
15Indian Institute of Technology, Mumbai, India
16Indiana University, Bloomington, Indiana 47408, USA
17Institut de Recherches Subatomiques, Strasbourg, France
18University of Jammu, Jammu 180001, India
19Kent State University, Kent, Ohio 44242, USA
20University of Kentucky, Lexington, Kentucky, 40506-0055, USA
21Institute of Modern Physics, Lanzhou, China
22Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
23Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
24Max-Planck-Institut für Physik, Munich, Germany
25Michigan State University, East Lansing, Michigan 48824, USA
26Moscow Engineering Physics Institute, Moscow Russia
27City College of New York, New York City, New York 10031, USA
28NIKHEF and Utrecht University, Amsterdam, The Netherlands
29Ohio State University, Columbus, Ohio 43210, USA
30Panjab University, Chandigarh 160014, India
31Pennsylvania State University, University Park, Pennsylvania 16802, USA
32Institute of High Energy Physics, Protvino, Russia
33Purdue University, West Lafayette, Indiana 47907, USA
34Pusan National University, Pusan, Republic of Korea
35University of Rajasthan, Jaipur 302004, India
36Rice University, Houston, Texas 77251, USA
37Universidade de Sao Paulo, Sao Paulo, Brazil
38University of Science & Technology of China, Hefei 230026, China
39Shanghai Institute of Applied Physics, Shanghai 201800, China
40SUBATECH, Nantes, France
41Texas A&M University, College Station, Texas 77843, USA
42University of Texas, Austin, Texas 78712, USA
43Tsinghua University, Beijing 100084, China
44United States Naval Academy, Annapolis, Maryland 21402, USA
45Valparaiso University, Valparaiso, Indiana 46383, USA
46Variable Energy Cyclotron Centre, Kolkata 700064, India
47Warsaw University of Technology, Warsaw, Poland
48University of Washington, Seattle, Washington 98195, USA
49Wayne State University, Detroit, Michigan 48201, USA
50Institute of Particle Physics, CCNU (HZNU), Wuhan 430079, China
51Yale University, New Haven, Connecticut 06520, USA
52University of Zagreb, Zagreb, HR-10002, Croatia
Received 7 May 2008; published 3 February 2009
Three-particle azimuthal correlation measurements with a high transverse momentum trigger particle are reported for pp, d+Au, and Au+Au collisions at √sNN=200 GeV by the STAR experiment. Dijet structures are observed in pp, d+Au and peripheral Au+Au collisions. An additional structure is observed in central Au+Au data, signaling conical emission of correlated charged hadrons. The conical emission angle is found to be θ=1.37±0.02(stat)-0.07+0.06(syst), independent of p⊥.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.052302
DOI:
10.1103/PhysRevLett.102.052302
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