Phys. Rev. Lett.
92,
092301
(2004)
[6 pages]
ρ0 Production and Possible Modification in Au+Au and p+p Collisions at √sNN=200 GeV
J. Adams et al.
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J. Adams3, C. Adler13, M. M. Aggarwal27, Z. Ahammed40, J. Amonett19, B. D. Anderson19, D. Arkhipkin12, G. S. Averichev11, S. K. Badyal18, J. Balewski15, O. Barannikova30,11, L. S. Barnby3, J. Baudot17, S. Bekele26, V. V. Belaga11, R. Bellwied43, J. Berger13, B. I. Bezverkhny45, S. Bhardwaj31, A. K. Bhati27, H. Bichsel42, A. Billmeier43, L. C. Bland2, C. O. Blyth3, B. E. Bonner32, M. Botje25, A. Boucham36, A. Brandin23, A. Bravar2, R. V. Cadman1, X. Z. Cai35, H. Caines45, M. Calderón de la Barca Sánchez2, J. Carroll20, J. Castillo20, D. Cebra5, P. Chaloupka10, S. Chattopadhyay40, H. F. Chen34, Y. Chen6, S. P. Chernenko11, M. Cherney9, A. Chikanian45, W. Christie2, J. P. Coffin17, T. M. Cormier43, J. G. Cramer42, H. J. Crawford4, D. Das40, S. Das40, A. A. Derevschikov29, L. Didenko2, T. Dietel13, W. J. Dong6, X. Dong34,20, J. E. Draper5, F. Du45, A. K. Dubey16, V. B. Dunin11, J. C. Dunlop2, M. R. Dutta Majumdar40, V. Eckardt21, L. G. Efimov11, V. Emelianov23, J. Engelage4, G. Eppley32, B. Erazmus36, M. Estienne36, P. Fachini2, V. Faine2, J. Faivre17, R. Fatemi15, K. Filimonov20, P. Filip10, E. Finch45, Y. Fisyak2, D. Flierl13, K. J. Foley2, J. Fu44, C. A. Gagliardi37, N. Gagunashvili11, J. Gans45, M. S. Ganti40, L. Gaudichet36, F. Geurts32, V. Ghazikhanian6, P. Ghosh40, J. E. Gonzalez6, O. Grachov43, O. Grebenyuk25, S. Gronstal9, D. Grosnick39, S. M. Guertin6, A. Gupta18, T. D. Gutierrez5, T. J. Hallman2, A. Hamed43, D. Hardtke20, J. W. Harris45, M. Heinz45, T. W. Henry37, S. Heppelmann28, B. Hippolyte45, A. Hirsch30, E. Hjort20, G. W. Hoffmann38, M. Horsley45, H. Z. Huang6, S. L. Huang34, E. Hughes7, T. J. Humanic26, G. Igo6, A. Ishihara38, P. Jacobs20, W. W. Jacobs15, M. Janik41, H. Jiang6,20, I. Johnson20, P. G. Jones3, E. G. Judd4, S. Kabana45, M. Kaplan8, D. Keane19, V. Yu. Khodyrev29, J. Kiryluk6, A. Kisiel41, J. Klay20, S. R. Klein20, A. Klyachko15, D. D. Koetke39, T. Kollegger13, M. Kopytine19, L. Kotchenda23, A. D. Kovalenko11, M. Kramer24, P. Kravtsov23, V. I. Kravtsov29, K. Krueger1, C. Kuhn17, A. I. Kulikov11, A. Kumar27, G. J. Kunde45, C. L. Kunz8, R. Kh. Kutuev12, A. A. Kuznetsov11, M. A. C. Lamont3, J. M. Landgraf2, S. Lange13, B. Lasiuk45, F. Laue2, J. Lauret2, A. Lebedev2, R. Lednický11, M. J. LeVine2, C. Li34, Q. Li43, S. J. Lindenbaum24, M. A. Lisa26, F. Liu44, L. Liu44, Z. Liu44, Q. J. Liu42, T. Ljubicic2, W. J. Llope32, H. Long6, R. S. Longacre2, M. Lopez-Noriega26, W. A. Love2, T. Ludlam2, D. Lynn2, J. Ma6, Y. G. Ma35, D. Magestro26, S. Mahajan18, L. K. Mangotra18, D. P. Mahapatra16, R. Majka45, R. Manweiler39, S. Margetis19, C. Markert45, L. Martin36, J. Marx20, H. S. Matis20, Yu. A. Matulenko29, C. J. McClain1, T. S. McShane9, F. Meissner20, Yu. Melnick29, A. Meschanin29, M. L. Miller45, Z. Milosevich8, N. G. Minaev29, C. Mironov19, A. Mischke25, D. Mishra16, J. Mitchell32, B. Mohanty40, L. Molnar30, C. F. Moore38, M. J. Mora-Corral21, D. A. Morozov29, V. Morozov20, M. M. de Moura33, M. G. Munhoz33, B. K. Nandi40, S. K. Nayak18, T. K. Nayak40, J. M. Nelson3, P. K. Netrakanti40, V. A. Nikitin12, L. V. Nogach29, B. Norman19, S. B. Nurushev29, G. Odyniec20, A. Ogawa2, V. Okorokov23, M. Oldenburg20, D. Olson20, G. Paic26, S. K. Pal40, Y. Panebratsev11, S. Y. Panitkin2, A. I. Pavlinov43, T. Pawlak41, T. Peitzmann25, V. Perevoztchikov2, C. Perkins4, W. Peryt41, V. A. Petrov12, S. C. Phatak16, R. Picha5, M. Planinic46, J. Pluta41, N. Porile30, J. Porter2, A. M. Poskanzer20, M. Potekhin2, E. Potrebenikova11, B. V. K. S. Potukuchi18, D. Prindle42, C. Pruneau43, J. Putschke21, G. Rai20, G. Rakness15, R. Raniwala31, S. Raniwala31, O. Ravel36, R. L. Ray38, S. V. Razin11,15, D. Reichhold30, J. G. Reid42, G. Renault36, F. Retiere20, A. Ridiger23, H. G. Ritter20, J. B. Roberts32, O. V. Rogachevski11, J. L. Romero5, A. Rose43, C. Roy36, L. J. Ruan34,2, R. Sahoo16, I. Sakrejda20, S. Salur45, J. Sandweiss45, I. Savin12, J. Schambach38, R. P. Scharenberg30, N. Schmitz21, L. S. Schroeder20, K. Schweda20, J. Seger9, P. Seyboth21, E. Shahaliev11, M. Shao34, W. Shao7, M. Sharma27, K. E. Shestermanov29, S. S. Shimanskii11, R. N. Singaraju40, F. Simon21, G. Skoro11, N. Smirnov45, R. Snellings25, G. Sood27, P. Sorensen20, J. Sowinski15, J. Speltz17, H. M. Spinka1, B. Srivastava30, T. D. S. Stanislaus39, R. Stock13, A. Stolpovsky43, M. Strikhanov23, B. Stringfellow30, C. Struck13, A. A. P. Suaide33, E. Sugarbaker26, C. Suire2, M. Šumbera10, B. Surrow2, T. J. M. Symons20, A. Szanto de Toledo33, P. Szarwas41, A. Tai6, J. Takahashi33, A. H. Tang2,25, D. Thein6, J. H. Thomas20, S. Timoshenko23, M. Tokarev11, M. B. Tonjes22, T. A. Trainor42, S. Trentalange6, R. E. Tribble37, O. Tsai6, T. Ullrich2, D. G. Underwood1, G. Van Buren2, A. M. VanderMolen22, R. Varma14, I. Vasilevski12, A. N. Vasiliev29, R. Vernet17, S. E. Vigdor15, Y. P. Viyogi40, S. A. Voloshin43, M. Vznuzdaev23, W. Waggoner9, F. Wang30, G. Wang7, G. Wang19, X. L. Wang34, Y. Wang38, Z. M. Wang34, H. Ward38, J. W. Watson19, J. C. Webb15, R. Wells26, G. D. Westfall22, C. Whitten, Jr.6, H. Wieman20, R. Willson26, S. W. Wissink15, R. Witt45, J. Wood6, J. Wu34, N. Xu20, Z. Xu2, Z. Z. Xu34, E. Yamamoto20, P. Yepes32, V. I. Yurevich11, B. Yuting25, Y. V. Zanevski11, H. Zhang45,2, W. M. Zhang19, Z. P. Zhang34, Z. P. Zhaomin34, Z. P. Zizong34, P. A. Żołnierczuk15, R. Zoulkarneev12, J. Zoulkarneeva12, and A. N. Zubarev11
1Argonne National Laboratory, Argonne, Illinois 60439, USA
2Brookhaven National Laboratory, Upton, New York 11973, USA
3University of Birmingham, Birmingham, United Kingdom
4University of California, Berkeley, California 94720, USA
5University of California, Davis, California 95616, USA
6University of California, Los Angeles, California 90095, USA
7California Institute of Technology, Pasadena, California 91125, USA
8Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
9Creighton University, Omaha, Nebraska 68178, USA
10Nuclear Physics Institute AS CR, Řež/Prague, Czech Republic
11Laboratory for High Energy (JINR), Dubna, Russia
12Particle Physics Laboratory (JINR), Dubna, Russia
13University of Frankfurt, Frankfurt, Germany
14Indian Institute of Technology, Mumbai, India
15Indiana University, Bloomington, Indiana 47408, USA
16Institute of Physics, Bhubaneswar 751005, India
17Institut de Recherches Subatomiques, Strasbourg, France
18University of Jammu, Jammu 180001, India
19Kent State University, Kent, Ohio 44242, USA
20Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
21Max-Planck-Institut für Physik, Munich, Germany
22Michigan State University, East Lansing, Michigan 48824, USA
23Moscow Engineering Physics Institute, Moscow, Russia
24City College of New York, New York City, New York 10031, USA
25NIKHEF, Amsterdam, The Netherlands
26The Ohio State University, Columbus, Ohio 43210, USA
27Panjab University, Chandigarh 160014, India
28Pennsylvania State University, University Park, Pennsylvania 16802, USA
29Institute of High Energy Physics, Protvino, Russia
30Purdue University, West Lafayette, Indiana 47907, USA
31University of Rajasthan, Jaipur 302004, India
32Rice University, Houston, Texas 77251, USA
33Universidade de Sao Paulo, Sao Paulo, Brazil
34University of Science & Technology of China, Anhui 230027, China
35Shanghai Institute of Nuclear Research, Shanghai 201800, People’s Republic of China
36SUBATECH, Nantes, France
37Texas A&M University, College Station, Texas 77843, USA
38University of Texas, Austin, Texas 78712, USA
39Valparaiso University, Valparaiso, Indiana 46383, USA
40Variable Energy Cyclotron Centre, Kolkata 700064, India
41Warsaw University of Technology, Warsaw, Poland
42University of Washington, Seattle, Washington 98195, USA
43Wayne State University, Detroit, Michigan 48201, USA
44Institute of Particle Physics, CCNU (HZNU), Wuhan, 430079 China
45Yale University, New Haven, Connecticut 06520, USA
46University of Zagreb, Zagreb, HR-10002, Croatia
Received 28 July 2003; published 5 March 2004
We report results on ρ(770)0→π+π- production at midrapidity in p+p and peripheral Au+Au collisions at √sNN=200 GeV. This is the first direct measurement of ρ(770)0→π+π- in heavy-ion collisions. The measured ρ0 peak in the invariant mass distribution is shifted by ∼40 MeV/c2 in minimum bias p+p interactions and ∼70 MeV/c2 in peripheral Au+Au collisions. The ρ0 mass shift is dependent on transverse momentum and multiplicity. The modification of the ρ0 meson mass, width, and shape due to phase space and dynamical effects are discussed.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.092301
DOI:
10.1103/PhysRevLett.92.092301
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