Centrality and transverse momentum dependence of D0-meson production at mid-rapidity in Au plus Au collisions ats √SNN=200 GeV

被引：75

作者：

Adam, J. ^{[12
]}

Adamczyk, L. ^{[2
]}

Adams, J. R. ^{[34
]}

Adkins, J. K. ^{[25
]}

Agakishiev, G. ^{[23
]}

Aggarwal, M. M. ^{[36
]}

Ahammed, Z. ^{[56
]}

Alekseev, I ^{[3
,30
]}

Anderson, D. M. ^{[50
]}

Aoyama, R. ^{[53
]}

Aparin, A. ^{[23
]}

Arkhipkin, D. ^{[5
]}

Aschenauer, E. C. ^{[5
]}

Ashraf, M. U. ^{[52
]}

Atetalla, F. ^{[24
]}

Attri, A. ^{[36
]}

Averichev, G. S. ^{[23
]}

Bairathi, V ^{[31
]}

Barish, K. ^{[9
]}

Bassill, A. J. ^{[9
]}

Behera, A. ^{[48
]}

Bellwied, R. ^{[19
]}

Bhasin, A. ^{[22
]}

Bhati, A. K. ^{[36
]}

Bielcik, J. ^{[13
]}

Bielcikova, J. ^{[33
]}

Bland, L. C. ^{[5
]}

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

Brandenburg, J. D. ^{[5
]}

Brandin, A., V ^{[30
]}

Brown, D. ^{[27
]}

Bryslawskyj, J. ^{[9
]}

Bunzarov, I ^{[23
]}

Butterworth, J. ^{[41
]}

Caines, H. ^{[59
]}

Sanchez, M. Calderon de la Barca ^{[7
]}

Cebra, D. ^{[7
]}

Chakaberia, I ^{[24
,45
]}

Chaloupka, P. ^{[13
]}

Chan, B. K. ^{[8
]}

Chang, F-H ^{[32
]}

Chang, Z. ^{[5
]}

Chankova-Bunzarova, N. ^{[23
]}

Chatterjee, A. ^{[56
]}

Chattopadhyay, S. ^{[56
]}

Chen, J. H. ^{[46
]}

Chen, X. ^{[44
]}

Cheng, J. ^{[52
]}

Cherney, M. ^{[12
]}

Christie, W. ^{[5
]}

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, Argonne, IL 60439 USA

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

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

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

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

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

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

[11] Univ Illinois, Chicago, IL 60607 USA

[12] Creighton Univ, Omaha, NE 68178 USA

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

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

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

[16] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

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

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

[19] Univ Houston, Houston, TX 77204 USA

[20] Indiana Univ, Bloomington, IN 47408 USA

[21] Inst Phys, Bhubaneswar 751005, India

[22] Univ Jammu, Jammu 180001, Jammu & Kashmir, India

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

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

[25] Univ Kentucky, Lexington, KY 40506 USA

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

[27] Lehigh Univ, Bethlehem, PA 18015 USA

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

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

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

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

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

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

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

[35] Inst Nucl Phys PAN, PL-31342 Krakow, Poland

[36] Panjab Univ, Chandigarh 160014, India

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

[38] Inst High Energy Phys, Protvino 142281, Russia

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

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

[41] Rice Univ, Houston, TX 77251 USA

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

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

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

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

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

[47] Southern Connecticut State Univ, New Haven, CT 06515 USA

[48] SUNY Stony Brook, Stony Brook, NY 11794 USA

[49] Temple Univ, Philadelphia, PA 19122 USA

[50] Texas A&M Univ, College Stn, TX 77843 USA

来源：

PHYSICAL REVIEW C | 2019年 / 99卷 / 03期

基金：

中国国家自然科学基金; 美国国家科学基金会; 新加坡国家研究基金会;

关键词：

PARTICLE-PRODUCTION; PB COLLISIONS; CHARM; DYNAMICS; MESONS; TPC;

D O I：

10.1103/PhysRevC.99.034908

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 report a new measurement of D-0-meson production at mid-rapidity (vertical bar y vertical bar < 1) in Au + Au collisions at root S-NN= 200 GeV utilizing the heavy flavor tracker, a high resolution silicon detector at the STAR experiment. Invariant yields of D-0 mesons with transverse momentum P-T less than or similar to 9 GeV/c are reported in various centrality bins (0-10%, 10-20%, 20-40%, 40-60%, and 60-80%). Blast-wave thermal models are used to fit the D-0-meson P-T spectra to study D-0 hadron kinetic freeze-out properties. The average radial flow velocity extracted from the fit is considerably smaller than that of light hadrons (pi, K, and p), but comparable to that of hadrons containing multiple strange quarks (phi, Xi(-)), indicating that D-0 mesons kinetically decouple from the system earlier than light hadrons. The calculated D-0 nuclear modification factors reaffirm that charm quarks suffer a large amount of energy loss in the medium, similar to those of light quarks for P-T > 4GeV/c in central 0-10% Au + Au collisions. At low P-T , the nuclear modification factors show a characteristic structure qualitatively consistent with the expectation from model predictions that charm quarks gain sizable collective motion during the medium evolution. The improved measurements are expected to offer new constraints to model calculations and help gain further insights into the hot and dense medium created in these collisions.

引用

页数：25

共 28 条

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