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Spin alignment measurements of the K*0(892) and (1020) vector mesons in heavy ion collisions at sNN=200 GeV

  • B. I. Abelev
  • , M. M. Aggarwal
  • , Z. Ahammed
  • , B. D. Anderson
  • , D. Arkhipkin
  • , G. S. Averichev
  • , Y. Bai
  • , J. Balewski
  • , O. Barannikova
  • , L. S. Barnby
  • , J. Baudot
  • , S. Baumgart
  • , D. R. Beavis
  • , R. Bellwied
  • , F. Benedosso
  • , R. R. Betts
  • , S. Bhardwaj
  • , A. Bhasin
  • , A. K. Bhati
  • , H. Bichsel
  • J. Bielcik, J. Bielcikova, B. Biritz, L. C. Bland, M. Bombara, B. E. Bonner, M. Botje, J. Bouchet, E. Braidot, A. V. Brandin, S. Bueltmann, T. P. Burton, M. Bystersky, X. Z. Cai, H. Caines, M. Calderón De La Barca Sánchez, J. Callner, 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, S. U. Chung, R. F. Clarke, M. J.M. Codrington, J. P. Coffin, T. M. Cormier, M. R. Cosentino, J. G. Cramer, H. J. Crawford, D. Das, S. Dash, M. Daugherity, M. M.De Moura, T. G. Dedovich, M. Dephillips, A. A. Derevschikov, R. Derradi De Souza, L. Didenko, T. Dietel, P. Djawotho, S. M. Dogra, X. Dong, J. L. Drachenberg, J. E. Draper, F. Du, J. C. Dunlop, M. R.Dutta Mazumdar, W. R. Edwards, L. G. Efimov, E. Elhalhuli, M. Elnimr, V. Emelianov, 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, L. Gaillard, D. R. Gangadharan, M. S. Ganti, E. Garcia-Solis, 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, W. He, M. Heinz, S. Heppelmann, B. Hippolyte, A. Hirsch, A. M. Hoffman, G. W. Hoffmann, D. J. Hofman, R. S. Hollis, H. Z. Huang, E. W. Hughes, T. J. Humanic, G. Igo, A. Iordanova, P. Jacobs, W. W. Jacobs, P. Jakl, F. Jin, P. G. Jones, E. G. Judd, S. Kabana, K. Kajimoto, K. Kang, J. Kapitan, M. Kaplan, D. Keane, A. Kechechyan, D. Kettler, V. Yu Khodyrev, J. Kiryluk, A. Kisiel, S. R. Klein, A. G. Knospe, A. Kocoloski, D. D. Koetke, T. Kollegger, M. Kopytine, L. Kotchenda, V. Kouchpil, P. Kravtsov, V. I. Kravtsov, K. Krueger, C. Kuhn, A. Kumar, L. Kumar, P. Kurnadi, M. A.C. Lamont, J. M. Landgraf, S. Lange, S. LaPointe, F. Laue, J. Lauret, A. Lebedev, R. Lednicky, C. H. Lee, M. J. LeVine, C. Li, Y. Li, G. Lin, X. 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, D. Lynn, G. L. Ma, J. G. Ma, Y. G. Ma, D. P. Mahapatra, R. Majka, L. K. Mangotra, R. Manweiler, S. Margetis, C. Markert, H. S. Matis, Yu A. Matulenko, T. S. McShane, A. Meschanin, J. Millane, M. L. Miller, N. G. Minaev, S. Mioduszewski, A. Mischke, J. Mitchell, B. Mohanty, D. A. Morozov, M. G. Munhoz, B. K. Nandi, C. Nattrass, T. K. Nayak, J. M. Nelson, C. Nepali, P. K. Netrakanti, M. J. Ng, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, H. Okada, V. Okorokov, D. Olson, M. Pachr, S. K. Pal, Y. Panebratsev, T. Pawlak, T. Peitzmann, V. Perevoztchikov, C. Perkins, W. Peryt, S. C. Phatak, M. Planinic, J. Pluta, N. Poljak, N. Porile, A. M. Poskanzer, M. Potekhin, B. V.K.S. Potukuchi, D. Prindle, C. Pruneau, N. K. Pruthi, J. Putschke, I. A. Qattan, R. Raniwala, S. Raniwala, R. L. Ray, A. Ridiger, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, A. Rose, C. Roy, L. Ruan, M. J. Russcher, V. Rykov, R. Sahoo, I. Sakrejda, T. Sakuma, S. Salur, J. Sandweiss, M. Sarsour, J. Schambach, R. P. Scharenberg, N. Schmitz, J. Seger, I. Selyuzhenkov, P. Seyboth, A. Shabetai, 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, R. Snellings, P. Sorensen, J. Sowinski, H. M. Spinka, B. Srivastava, A. Stadnik, T. D.S. Stanislaus, D. Staszak, R. Stock, M. Strikhanov, B. Stringfellow, A. A.P. Suaide, M. C. Suarez, N. L. Subba, M. Sumbera, X. M. Sun, Z. Sun, B. Surrow, T. J.M. Symons, A. Szanto De Toledo, J. Takahashi, A. H. Tang, Z. Tang, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, S. Timoshenko, M. Tokarev, T. A. Trainor, V. N. Tram, A. L. Trattner, S. Trentalange, R. E. Tribble, O. D. Tsai, J. Ulery, T. Ullrich, D. G. Underwood, G. Van Buren, N. Van Der Kolk, M. Van Leeuwen, A. M.Vander Molen, R. Varma, G. M.S. Vasconcelos, I. M. Vasilevski, A. N. Vasiliev, F. Videbaek, S. E. Vigdor, Y. P. Viyogi, S. Vokal, S. A. Voloshin, M. Wada, W. T. Waggoner, F. Wang, G. Wang, J. S. Wang, Q. Wang, X. Wang, X. L. Wang, Y. Wang, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, J. Wu, Y. Wu, N. Xu, Q. H. Xu, Z. Xu, P. Yepes, I. K. Yoo, Q. Yue, M. Zawisza, H. Zbroszczyk, W. Zhan, H. Zhang, S. Zhang, W. M. Zhang, Y. Zhang, Z. P. Zhang, Y. Zhao, C. Zhong, J. Zhou, R. Zoulkarneev, Y. Zoulkarneeva, J. X. Zuo
  • University of Illinois at Chicago
  • Panjab University
  • Variable Energy Cyclotron Centre India
  • Kent State University
  • Particle Physics Laboratory (JINR)
  • Utrecht University
  • Massachusetts Institute of Technology
  • University of Birmingham
  • Institut de Recherches Subatomiques
  • Yale University
  • Brookhaven National Laboratory
  • Wayne State University
  • University of Rajasthan
  • University of Jammu
  • University of Washington
  • University Prague
  • UCLA
  • Rice University
  • National Research Nuclear University MEPhI
  • Shanghai Institute of Applied Physics, Chinese Academy of Sciences
  • University of California, Davis
  • Texas AM University CE/TTI 503-C
  • Ohio State University
  • University of Science and Technology of China
  • CCNU (HZNU)
  • Tsinghua University
  • Creighton University
  • Pusan National University
  • University of São Paulo
  • University of California, Berkeley
  • Institute of Physics Bhubaneswar
  • The University of Texas at Austin
  • Institute of High Energy Physics
  • Universidade Estadual de Campinas
  • J. W. Goethe University Frankfurt am Main
  • Indiana University Bloomington
  • Lawrence Berkeley National Laboratory
  • SUBATECH
  • Pennsylvania State University
  • University of Kentucky
  • Valparaiso University
  • Purdue University
  • California Institute of Technology
  • Carnegie Mellon University
  • Argonne National Laboratory
  • City Coll of New York
  • IIT Bombay
  • Warsaw University of Technology
  • University of Zagreb
  • Max-Planck-Institut für Physik
  • Institute of Modern Physics Chinese Academy of Sciences
  • Michigan State University

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

We present the first spin alignment measurements for the K*0(892) and (1020) vector mesons produced at midrapidity with transverse momenta up to 5 GeV/c at sNN=200 GeV at RHIC. The diagonal spin-density matrix elements with respect to the reaction plane in Au+Au collisions are ρ00=0.32±0.04 (stat) ± 0.09 (syst) for the K*0 (0.8<pT<5.0 GeV/c) and ρ00=0.34±0.02 (stat) ± 0.03 (syst) for the (0.4<pT<5.0 GeV/c) and are constant with transverse momentum and collision centrality. The data are consistent with the unpolarized expectation of 1/3 and thus no evidence is found for the transfer of the orbital angular momentum of the colliding system to the vector-meson spins. Spin alignments for K*0 and in Au+Au collisions were also measured with respect to the particle's production plane. The result, ρ00=0.41±0.02 (stat) ± 0.04 (syst), is consistent with that in p+p collisions, ρ00=0.39±0.03 (stat) ± 0.06 (syst), also measured in this work. The measurements thus constrain the possible size of polarization phenomena in the production dynamics of vector mesons.

Original languageBritish English
Article number061902
JournalPhysical Review C - Nuclear Physics
Volume77
Issue number6
DOIs
StatePublished - 12 Jun 2008

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