Strange hadron production in Au plus Au collisions at √SNN=7.7, 11.5, 19.6, 27, and 39 GeV

被引：70

作者：

Adam, J. ^{[6
]}

Adamczyk, L. ^{[2
]}

Adams, J. R. ^{[39
]}

Adkins, J. K. ^{[30
]}

Agakishiev, G. ^{[28
]}

Aggarwal, M. M. ^{[40
]}

Ahammed, Z. ^{[60
]}

Alekseev, I ^{[3
,35
]}

Anderson, D. M. ^{[54
]}

Aoyama, R. ^{[57
]}

Aparin, A. ^{[28
]}

Arkhipkin, D. ^{[6
]}

Aschenauer, E. C. ^{[6
]}

Ashraf, M. U. ^{[56
]}

Atetalla, F. ^{[29
]}

Attri, A. ^{[40
]}

Averichev, G. S. ^{[28
]}

Bairathi, V ^{[36
]}

Barish, K. ^{[10
]}

Bassill, A. J. ^{[10
]}

Behera, A. ^{[52
]}

Bellwied, R. ^{[20
]}

Bhasin, A. ^{[27
]}

Bhati, A. K. ^{[40
]}

Bielcik, J. ^{[14
]}

Bielcikova, J. ^{[38
]}

Bland, L. C. ^{[6
]}

Bordyuzhin, I. G. ^{[3
]}

Brandenburg, J. D. ^{[6
,49
]}

Brandin, A., V ^{[35
]}

Bryslawskyj, J. ^{[10
]}

Bunzarov, I ^{[28
]}

Butterworth, J. ^{[45
]}

Caines, H. ^{[63
]}

de la Barca Sanchez, M. Calderon ^{[8
]}

Cebra, D. ^{[8
]}

Chakaberia, I ^{[6
,29
]}

Chaloupka, P. ^{[14
]}

Chan, B. K. ^{[9
]}

Chang, F-H ^{[37
]}

Chang, Z. ^{[6
]}

Chankova-Bunzarova, N. ^{[28
]}

Chatterjee, A. ^{[60
]}

Chattopadhyay, S. ^{[60
]}

Chen, J. H. ^{[18
]}

Chen, X. ^{[48
]}

Cheng, J. ^{[56
]}

Cherney, M. ^{[13
]}

Christie, W. ^{[6
]}

Crawford, H. J. ^{[7
]}

机构：

[1] Abilene Christian Univ, Abilene, TX 79699 USA

[2] AGH Univ Sci & Technol, FPACS, PL-30059 Krakow, Poland

[3] Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia

[4] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA

[5] Amer Univ Cairo, Cairo, Egypt

[6] Brookhaven Natl Lab, Upton, NY 11973 USA

[7] Univ Calif Berkeley, Berkeley, CA 94720 USA

[8] Univ Calif Davis, Davis, CA 95616 USA

[9] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[10] Univ Calif Riverside, Riverside, CA 92521 USA

[11] Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China

[12] Univ Illinois, Chicago, IL 60607 USA

[13] Creighton Univ, Omaha, NE 68178 USA

[14] Czech Tech Univ, FNSPE, Prague 11519, Czech Republic

[15] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

[16] Eotvos Lorand Univ, H-1117 Budapest, Hungary

[17] Frankfurt Inst Adv Studies FIAS, D-60438 Frankfurt, Germany

[18] Fudan Univ, Shanghai 200433, Peoples R China

[19] Heidelberg Univ, D-69120 Heidelberg, Germany

[20] Univ Houston, Houston, TX 77204 USA

[21] Huzhou Univ, Huzhou 313000, Zhejiang, Peoples R China

[22] Indian Inst Sci Educ & Res IISER, Berhampur 760010, India

[23] Indian Inst Sci Educ & Res, Tirupati 517507, Andhra Pradesh, India

[24] Indian Inst Technol, Patna 801106, Bihar, India

[25] Indiana Univ, Bloomington, IN 47408 USA

[26] Inst Phys, Bhubaneswar 751005, India

[27] Univ Jammu, Jammu 180001, India

[28] Joint Inst Nucl Res, Dubna 141980, Russia

[29] Kent State Univ, Kent, OH 44242 USA

[30] Univ Kentucky, Lexington, KY 40506 USA

[31] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[32] Lehigh Univ, Bethlehem, PA 18015 USA

[33] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[34] Michigan State Univ, E Lansing, MI 48824 USA

[35] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

[36] HBNI, Natl Inst Sci Educ & Res, Jatni 752050, India

[37] Natl Cheng Kung Univ, Tainan 70101, Taiwan

[38] CAS, Nucl Phys Inst, Rez 25068, Czech Republic

[39] Ohio State Univ, Columbus, OH 43210 USA

[40] Panjab Univ, Chandigarh 160014, India

[41] Penn State Univ, University Pk, PA 16802 USA

[42] NRC Kurchatov Inst, Inst High Energy Phys, Protvino 142281, Russia

[43] Purdue Univ, W Lafayette, IN 47907 USA

[44] Pusan Natl Univ, Pusan 46241, South Korea

[45] Rice Univ, Houston, TX 77251 USA

[46] Rutgers State Univ, Piscataway, NJ 08854 USA

[47] Univ Sao Paulo, BR-05314970 Sao Paulo, Brazil

[48] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

[49] Shandong Univ, Qingdao 266237, Shandong, Peoples R China

[50] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

来源：

PHYSICAL REVIEW C | 2020年 / 102卷 / 03期

基金：

美国国家科学基金会; 中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

NUCLEUS-NUCLEUS COLLISIONS; PHI-MESON PRODUCTION; ENERGY-DEPENDENCE; LAMBDA PRODUCTION; AU+AU COLLISIONS; PARTICLE IDENTIFICATION; TRANSVERSE-MOMENTUM; HYPERON PRODUCTION; PB COLLISIONS; KAON;

D O I：

10.1103/PhysRevC.102.034909

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present STAR measurements of strange hadron (K-S(0), Lambda, (Lambda) over bar, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+), and phi) production at midrapidity (vertical bar y vertical bar < 0.5) in Au + Au collisions at root S-NN = 7.7-39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse-momentum spectra, averaged transverse mass, and the overall integrated yields of these strange hadrons are presented versus the centrality and collision energy. Antibaryon-to-baryon ratios (<(Lambda)over bar>/Lambda, (Xi) over bar (+)/Xi(-), (Omega) over bar (+)/Omega(-)) are presented as well and used to test a thermal statistical model and to extract the temperature normalized strangeness and baryon chemical potentials at hadronic freeze-out (mu(B)/T-ch and mu(S)/T-ch) in central collisions. Strange baryon-to-pion ratios are compared to various model predictions in central collisions for all energies. The nuclear modification factors (R-CP) and antibaryon-to-meson ratios as a function of transverse momentum are presented for all collision energies. The K-S(0) R-CP shows no suppression for P-T up to 3.5 GeV/c at energies of 7.7 and 11.5 GeV. The (Lambda) over bar /K-S(0) ratio also shows baryon-to-meson enhancement at intermediate p(T) (approximate to 2.5 GeV/c) in central collisions at energies above 19.6 GeV. Both observations suggest that there is likely a change of the underlying strange quark dynamics at collision energies below 19.6 GeV.

引用

页数：25

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