IMP OpenIR
Systematic measurements of identified particle spectra in pp, d plus Au, and Au plus Au collisions at the STAR detector
Abelev, B. I.1; Aggarwal, M. M.31; Ahammed, Z.47; Anderson, B. D.19; Arkhipkin, D.13; Averichev, G. S.12; Bai, Y.28,29; Balewski, J.; Barannikova, O.1; Barnby, L. S.3; Baudot, J.17; Baumgart, S.52; Beavis, D. R.4; Bellwied, R.50; Benedosso, F.28,29; Betts, R. R.1; Bhardwaj, S.36; Bhasin, A.18; Bhati, A. K.31; Bichsel, H.49; Bielcik, J.; Bielcikova, J.11; Biritz, B.7; Bland, L. C.4; Bombara, M.3; Bonner, B. E.37; Botje, M.28,29; Bouchet, J.19; Braidot, E.28,29; Brandin, A. V.26; Bruna, E.52; Bueltmann, S.4; Burton, T. P.3; Bystersky, M.; Cai, X. Z.40; Caines, H.52; Sanchez, M. Calderson de la Barca6; Callner, J.1; Catu, O.52; Cebra, D.6; Cendejas, R.7; Cervantes, M. C.11,42; Chajecki, Z.30; Chaloupka, P.11; Chattopadhyay, S.47; Chen, H. F.39; Chen, J. H.40; Chen, J. Y.51; Cheng, J.44; Cherney, M.10; Chikanian, A.52; Choi, K. E.35; Christie, W.4; Chung, S. U.4; Clarke, R. F.42; Codrington, M. J. M.42; Coffin, J. P.17; Cormier, T. M.50; Cosentino, M. R.38; Cramer, J. G.49; Crawford, H. 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2009-03-01
Source PublicationPHYSICAL REVIEW C
ISSN0556-2813
Volume79Pages:58
AbstractIdentified charged-particle spectra of pi(+/-), K-+/-, p, and (p) over bar at midrapidity (vertical bar y vertical bar < 0.1) measured by the dE/dx method in the STAR (solenoidal tracker at the BNL Relativistic Heavy Ion Collider) time projection chamber are reported for pp and d + Au collisions at root s(NN) = 200 GeV and for Au + Au collisions at 62.4, 130, and 200 GeV. Average transverse momenta, total particle production, particle yield ratios, strangeness, and baryon production rates are investigated as a function of the collision system and centrality. The transverse momentum spectra are found to be flatter for heavy particles than for light particles in all collision systems; the effect is more prominent for more central collisions. The extracted average transverse momentum of each particle species follows a trend determined by the total charged-particle multiplicity density. The Bjorken energy density estimate is at least several GeV/fm(3) for a formation time less than 1 fm/c. A significantly larger net-baryon density and a stronger increase of the net-baryon density with centrality are found in Au + Au collisions at 62.4 GeV than at the two higher energies. Antibaryon production relative to total particle multiplicity is found to be constant over centrality, but increases with the collision energy. Strangeness production relative to total particle multiplicity is similar at the three measured RHIC energies. Relative strangeness production increases quickly with centrality in peripheral Au + Au collisions, to a value about 50% above the pp value, and remains rather constant in more central collisions. Bulk freeze-out properties are extracted from thermal equilibrium model and hydrodynamics-motivated blast-wave model fits to the data. Resonance decays are found to have little effect on the extracted kinetic freeze-out parameters because of the transverse momentum range of our measurements. The extracted chemical freeze-out temperature is constant, independent of collision system or centrality; its value is close to the predicted phase-transition temperature, suggesting that chemical freeze-out happens in the vicinity of hadronization and the chemical freeze-out temperature is universal despite the vastly different initial conditions in the collision systems. The extracted kinetic freeze-out temperature, while similar to the chemical freeze-out temperature in pp, d + Au, and peripheral Au + Au collisions, drops significantly with centrality in Au + Au collisions, whereas the extracted transverse radial flow velocity increases rapidly with centrality. There appears to be a prolonged period of particle elastic scatterings from chemical to kinetic freeze-out in central Au + Au collisions. The bulk properties extracted at chemical and kinetic freeze-out are observed to evolve smoothly over the measured energy range, collision systems, and collision centralities.
DOI10.1103/PhysRevC.79.034909
Indexed BySCI
Language英语
Funding ProjectScience and Technology Facilities Council[PP/F001061/1]
WOS Research AreaPhysics
WOS KeywordHEAVY-ION COLLISIONS ; QUARK-GLUON-PLASMA ; NUCLEUS-NUCLEUS COLLISIONS ; TIME PROJECTION CHAMBER ; IMPACT PARAMETER REPRESENTATION ; PROTON-ANTIPROTON COLLISIONS ; TRANSVERSE-MOMENTUM SPECTRA ; RESISTIVE PLATE CHAMBERS ; HIGH-DENSITY QCD ; AU+AU COLLISIONS
WOS SubjectPhysics, Nuclear
WOS IDWOS:000264766100047
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:686[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://119.78.100.186/handle/113462/30467
Collection中国科学院近代物理研究所
Corresponding AuthorAbelev, B. I.
Affiliation1.Univ Illinois, Chicago, IL 60607 USA
2.Argonne Natl Lab, Argonne, IL 60439 USA
3.Univ Birmingham, Birmingham, W Midlands, England
4.Brookhaven Natl Lab, Upton, NY 11973 USA
5.Univ Calif Berkeley, Berkeley, CA 94720 USA
6.Univ Calif Davis, Davis, CA 95616 USA
7.Univ Calif Los Angeles, Los Angeles, CA 90095 USA
8.Univ Estadual Campinas, Sao Paulo, Brazil
9.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
10.Creighton Univ, Omaha, NE 68178 USA
11.Nucl Res Inst AS CR, CZ-25068 Rez, Czech Republic
12.Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia
13.Joint Inst Nucl Res Dubna, Particle Phys Lab, Dubna, Russia
14.Inst Phys, Bhubaneswar 751005, Orissa, India
15.Indian Inst Technol, Bombay 400076, Maharashtra, India
16.Indiana Univ, Bloomington, IN 47408 USA
17.Inst Rech Subatom, Strasbourg, France
18.Univ Jammu, Jammu 180001, India
19.Kent State Univ, Kent, OH 44242 USA
20.Univ Kentucky, Lexington, KY 40506 USA
21.Inst Modern Phys, Lanzhou, Peoples R China
22.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
23.MIT, Cambridge, MA 02139 USA
24.Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
25.Michigan State Univ, E Lansing, MI 48824 USA
26.Moscow Engn Phys Inst, Moscow 115409, Russia
27.CUNY City Coll, New York, NY 10031 USA
28.NIKHEF, Amsterdam, Netherlands
29.Univ Utrecht, Amsterdam, Netherlands
30.Ohio State Univ, Columbus, OH 43210 USA
31.Panjab Univ, Chandigarh 160014, India
32.Penn State Univ, University Pk, PA 16802 USA
33.Inst High Energy Phys, Protvino, Russia
34.Purdue Univ, W Lafayette, IN 47907 USA
35.Pusan Natl Univ, Pusan 609735, South Korea
36.Univ Rajasthan, Jaipur 302004, Rajasthan, India
37.Rice Univ, Houston, TX 77251 USA
38.Univ Sao Paulo, Sao Paulo, Brazil
39.Univ Sci & Technol China, Hefei 230026, Peoples R China
40.Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
41.SUBATECH, Nantes, France
42.Texas A&M Univ, College Stn, TX 77843 USA
43.Univ Texas Austin, Austin, TX 78712 USA
44.Tsinghua Univ, Beijing 100084, Peoples R China
45.USN Acad, Annapolis, MD 21402 USA
46.Valparaiso Univ, Valparaiso, IN 46383 USA
47.Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India
48.Warsaw Univ Technol, Warsaw, Poland
49.Univ Washington, Seattle, WA 98195 USA
50.Wayne State Univ, Detroit, MI 48201 USA
51.CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China
52.Yale Univ, New Haven, CT 06520 USA
53.Univ Zagreb, HR-10002 Zagreb, Croatia
Recommended Citation
GB/T 7714
Abelev, B. I.,Aggarwal, M. M.,Ahammed, Z.,et al. Systematic measurements of identified particle spectra in pp, d plus Au, and Au plus Au collisions at the STAR detector[J]. PHYSICAL REVIEW C,2009,79:58.
APA Abelev, B. I..,Aggarwal, M. M..,Ahammed, Z..,Anderson, B. D..,Arkhipkin, D..,...&Zuo, J. X..(2009).Systematic measurements of identified particle spectra in pp, d plus Au, and Au plus Au collisions at the STAR detector.PHYSICAL REVIEW C,79,58.
MLA Abelev, B. I.,et al."Systematic measurements of identified particle spectra in pp, d plus Au, and Au plus Au collisions at the STAR detector".PHYSICAL REVIEW C 79(2009):58.
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