Phys. Rev. Lett.
89,
272302
(2002)
[6 pages]
Coherent ρ0 Production in Ultraperipheral Heavy-Ion Collisions
C. Adler et al. STAR Collaboration
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C. Adler11, Z. Ahammed23, C. Allgower12, J. Amonett14, B. D. Anderson14, M. Anderson5, G. S. Averichev9, J. Balewski12, O. Barannikova9,23, L. S. Barnby14, J. Baudot13, S. Bekele20, V. V. Belaga9, R. Bellwied31, J. Berger11, H. Bichsel30, L. C. Bland2, C. O. Blyth3, B. E. Bonner24, A. Boucham26, A. Brandin18, A. Bravar2, R. V. Cadman1, H. Caines20, M. Calderón de la Barca Sánchez2, A. Cardenas23, J. Carroll15, J. Castillo26, M. Castro31, D. Cebra5, P. Chaloupka20, S. Chattopadhyay31, Y. Chen6, S. P. Chernenko9, M. Cherney8, A. Chikanian33, B. Choi28, W. Christie2, J. P. Coffin13, T. M. Cormier31, J. G. Cramer30, H. J. Crawford4, W. S. Deng2, A. A. Derevschikov22, L. Didenko2, T. Dietel11, J. E. Draper5, V. B. Dunin9, J. C. Dunlop33, V. Eckardt16, L. G. Efimov9, V. Emelianov18, J. Engelage4, G. Eppley24, B. Erazmus26, P. Fachini2, V. Faine2, K. Filimonov15, E. Finch33, Y. Fisyak2, D. Flierl11, K. J. Foley2, J. Fu15,32, C. A. Gagliardi27, N. Gagunashvili9, J. Gans33, L. Gaudichet26, M. Germain13, F. Geurts24, V. Ghazikhanian6, O. Grachov31, V. Grigoriev18, M. Guedon13, E. Gushin18, T. J. Hallman2, D. Hardtke15, J. W. Harris33, T. W. Henry27, S. Heppelmann21, T. Herston23, B. Hippolyte13, A. Hirsch23, E. Hjort15, G. W. Hoffmann28, M. Horsley33, H. Z. Huang6, T. J. Humanic20, G. Igo6, A. Ishihara28, Yu. I. Ivanshin10, P. Jacobs15, W. W. Jacobs12, M. Janik29, I. Johnson15, P. G. Jones3, E. G. Judd4, M. Kaneta15, M. Kaplan7, D. Keane14, J. Kiryluk6, A. Kisiel29, J. Klay15, S. R. Klein15, A. Klyachko12, A. S. Konstantinov22, M. Kopytine14, L. Kotchenda18, A. D. Kovalenko9, M. Kramer19, P. Kravtsov18, K. Krueger1, C. Kuhn13, A. I. Kulikov9, G. J. Kunde33, C. L. Kunz7, R. Kh. Kutuev10, A. A. Kuznetsov9, L. Lakehal-Ayat26, M. A. C. Lamont3, J. M. Landgraf2, S. Lange11, C. P. Lansdell28, B. Lasiuk33, F. Laue2, A. Lebedev21, R. Lednický9, V. M. Leontiev22, M. J. LeVine2, Q. Li31, S. J. Lindenbaum19, M. A. Lisa20, F. Liu32, L. Liu32, Z. Liu32, Q. J. Liu30, T. Ljubicic2, W. J. Llope24, G. LoCurto16, H. Long6, R. S. Longacre2, M. Lopez-Noriega20, W. A. Love2, T. Ludlam2, D. Lynn2, J. Ma6, R. Majka33, S. Margetis14, C. Markert33, L. Martin26, J. Marx15, H. S. Matis15, Yu. A. Matulenko22, T. S. McShane8, F. Meissner15, Yu. Melnick22, A. Meschanin22, M. Messer2, M. L. Miller33, Z. Milosevich7, N. G. Minaev22, J. Mitchell24, V. A. Moiseenko10, C. F. Moore28, V. Morozov15, M. M. de Moura31, M. G. Munhoz25, J. M. Nelson3, P. Nevski2, V. A. Nikitin10, L. V. Nogach22, B. Norman14, S. B. Nurushev22, J. Nystrand15, G. Odyniec15, A. Ogawa21, V. Okorokov18, M. Oldenburg16, D. Olson15, G. Paic20, S. U. Pandey31, Y. Panebratsev9, S. Y. Panitkin2, A. I. Pavlinov31, T. Pawlak29, V. Perevoztchikov2, W. Peryt29, V. A. Petrov10, M. Planinic12, J. Pluta29, N. Porile23, J. Porter2, A. M. Poskanzer15, E. Potrebenikova9, D. Prindle30, C. Pruneau31, J. Putschke16, G. Rai15, G. Rakness12, O. Ravel26, R. L. Ray28, S. V. Razin9,12, D. Reichhold8, J. G. Reid30, F. Retiere15, A. Ridiger18, H. G. Ritter15, J. B. Roberts24, O. V. Rogachevski9, J. L. Romero5, C. Roy26, V. Rykov31, I. Sakrejda15, S. Salur33, J. Sandweiss33, A. C. Saulys2, I. Savin10, J. Schambach28, R. P. Scharenberg23, N. Schmitz16, L. S. Schroeder15, A. Schüttauf16, K. Schweda15, J. Seger8, D. Seliverstov18, P. Seyboth16, E. Shahaliev9, K. E. Shestermanov22, S. S. Shimanskii9, V. S. Shvetcov10, G. Skoro9, N. Smirnov33, R. Snellings15, P. Sorensen6, J. Sowinski12, H. M. Spinka1, B. Srivastava23, E. J. Stephenson12, R. Stock11, A. Stolpovsky31, M. Strikhanov18, B. Stringfellow23, C. Struck11, A. A. P. Suaide31, E. Sugarbaker20, C. Suire2, M. Šumbera20, B. Surrow2, T. J. M. Symons15, A. Szanto de Toledo25, P. Szarwas29, A. Tai6, J. Takahashi25, A. H. Tang14, J. H. Thomas15, M. Thompson3, V. Tikhomirov18, M. Tokarev9, M. B. Tonjes17, T. A. Trainor30, S. Trentalange6, R. E. Tribble27, V. Trofimov18, O. Tsai6, T. Ullrich2, D. G. Underwood1, G. Van Buren2, A. M. VanderMolen17, I. M. Vasilevski10, A. N. Vasiliev22, S. E. Vigdor12, S. A. Voloshin31, F. Wang23, H. Ward28, J. W. Watson14, R. Wells20, G. D. Westfall17, C. Whitten,, Jr.6, H. Wieman15, R. Willson20, S. W. Wissink12, R. Witt33, J. Wood6, N. Xu15, Z. Xu2, A. E. Yakutin22, E. Yamamoto15, J. Yang6, P. Yepes24, V. I. Yurevich9, Y. V. Zanevski9, I. Zborovský9, H. Zhang33, W. M. Zhang14, R. Zoulkarneev10, and A. N. Zubarev9 (STAR Collaboration)
1Argonne National Laboratory, Argonne, Illinois 60439
2Brookhaven National Laboratory, Upton, New York 11973
3University of Birmingham, Birmingham, United Kingdom
4University of California, Berkeley, California 94720
5University of California, Davis, California 95616
6University of California, Los Angeles, California 90095
7Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
8Creighton University, Omaha, Nebraska 68178
9Laboratory for High Energy (JINR), Dubna, Russia
10Particle Physics Laboratory (JINR), Dubna, Russia
11University of Frankfurt, Frankfurt, Germany
12Indiana University, Bloomington, Indiana 47408
13Institut de Recherches Subatomiques, Strasbourg, France
14Kent State University, Kent, Ohio 44242
15Lawrence Berkeley National Laboratory, Berkeley, California 94720
16Max-Planck-Institut für Physik, Munich, Germany
17Michigan State University, East Lansing, Michigan 48824
18Moscow Engineering Physics Institute, Moscow, Russia
19City College of New York, New York City, New York 10031
20Ohio State University, Columbus, Ohio 43210
21Pennsylvania State University, University Park, Pennsylvania 16802
22Institute of High Energy Physics, Protvino, Russia
23Purdue University, West Lafayette, Indiana 47907
24Rice University, Houston, Texas 77251
25Universidade de Sao Paulo, Sao Paulo, Brazil
26SUBATECH, Nantes, France
27Texas A&M, College Station, Texas 77843
28University of Texas, Austin, Texas 78712
29Warsaw University of Technology, Warsaw, Poland
30University of Washington, Seattle, Washington 98195
31Wayne State University, Detroit, Michigan 48201
32Institute of Particle Physics, CCNU (HZNU), Wuhan 430079, China
33Yale University, New Haven, Connecticut 06520
Received 7 June 2002; published 20 December 2002
The STAR Collaboration reports the first observation of exclusive ρ0 photoproduction, AuAu→AuAuρ0, and ρ0 production accompanied by mutual nuclear Coulomb excitation, AuAu→Au⋆Au⋆ρ0, in ultraperipheral heavy-ion collisions. The ρ0 have low transverse momenta, consistent with coherent coupling to both nuclei. The cross sections at √sNN=130 GeV agree with theoretical predictions treating ρ0 production and Coulomb excitation as independent processes.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.272302
DOI:
10.1103/PhysRevLett.89.272302
PACS:
25.75.Dw, 13.60.–r, 25.20.–x
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