Measurements of jet quenching with semi-inclusive hadron plus jet distributions in Au plus Au collisions at √sNN=200 GeV

被引：67

作者：

Adamczyk, L. ^{[1
]}

Adkins, J. K. ^{[19
]}

Agakishiev, G. ^{[17
]}

Aggarwal, M. M. ^{[31
]}

Ahammed, Z. ^{[50
]}

Ajitanand, N. N. ^{[40
]}

Alekseev, I. ^{[15
,26
]}

Anderson, D. M. ^{[42
]}

Aoyama, R. ^{[46
]}

Aparin, A. ^{[17
]}

Arkhipkin, D. ^{[3
]}

Aschenauer, E. C. ^{[3
]}

Ashraf, M. U. ^{[45
]}

Attri, A. ^{[31
]}

Averichev, G. S. ^{[17
]}

Bai, X. ^{[7
]}

Bairathi, V. ^{[27
]}

Behera, A. ^{[40
]}

Bellwied, R. ^{[44
]}

Bhasin, A. ^{[16
]}

Bhati, A. K. ^{[31
]}

Bhattarai, P. ^{[43
]}

Bielcik, J. ^{[10
]}

Bielcikova, J. ^{[11
]}

Bland, L. C. ^{[3
]}

Bordyuzhin, I. G. ^{[15
]}

Bouchet, J. ^{[18
]}

Brandenburg, J. D. ^{[36
]}

Brandin, A. V. ^{[26
]}

Brown, D. ^{[23
]}

Bunzarov, I. ^{[17
]}

Butterworth, J. ^{[36
]}

Caines, H. ^{[54
]}

Sanchez, M. Calderon de la Barca ^{[5
]}

Campbell, J. M. ^{[29
]}

Cebra, D. ^{[5
]}

Chakaberia, I. ^{[3
]}

Chaloupka, P. ^{[10
]}

Chang, Z. ^{[42
]}

Chankova-Bunzarova, N. ^{[17
]}

Chatterjee, A. ^{[50
]}

Chattopadhyay, S. ^{[50
]}

Chen, X. ^{[21
,37
]}

Chen, J. H. ^{[39
]}

Chen, X. ^{[21
,37
]}

Cheng, J. ^{[45
]}

Cherney, M. ^{[9
]}

Christie, W. ^{[3
]}

Contin, G. ^{[22
]}

Crawford, H. J. ^{[4
]}

机构：

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

[2] Argonne Natl Lab, Argonne, IL 60439 USA

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

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

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

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

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

[8] Univ Illinois, Chicago, IL 60607 USA

[9] Creighton Univ, Omaha, NE 68178 USA

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

[11] Nucl Phys Inst AS CR, Prague 25068, Czech Republic

[12] FIAS, D-60438 Frankfurt, Germany

[13] Inst Phys, Bhubaneswar 751005, Orissa, India

[14] Indiana Univ, Bloomington, IN 47408 USA

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

[16] Univ Jammu, Jammu 180001, India

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

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

[19] Univ Kentucky, Lexington, KY 40506 USA

[20] Lamar Univ, Dept Phys, Beaumont, TX 77710 USA

[21] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China

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

[23] Lehigh Univ, Bethlehem, PA 18015 USA

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

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

[26] Nat Res Nucl Univ MEPhI, Moscow 115409, Russia

[27] Nat Inst Sci Educ & Res, HBNI, Jatni 752050, India

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

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

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

[31] Panjab Univ, Chandigarh 160014, India

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

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

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

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

[36] Rice Univ, Houston, TX 77251 USA

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

[38] Shandong Univ, Jinan 250100, Shandong, Peoples R China

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

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

[41] Temple Univ, Philadelphia, PA 19122 USA

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

[43] Univ Texas Austin, Austin, TX 78712 USA

[44] Univ Houston, Houston, TX 77204 USA

[45] Tsinghua Univ, Beijing 100084, Peoples R China

[46] Univ Tsukuba, Tsukuba, Ibaraki, Japan

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

[48] US Naval Acad, Annapolis, MD 21402 USA

[49] Valparaiso Univ, Valparaiso, IN 46383 USA

[50] Variable Energy Cyclotron Ctr, Kolkata 700064, India

来源：

PHYSICAL REVIEW C | 2017年 / 96卷 / 02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：

HEAVY-ION COLLISIONS; PB-PB COLLISIONS; TRANSVERSE-MOMENTUM; RECONSTRUCTED JETS; PP COLLISIONS; DEPENDENCE; SUPPRESSION; RADIUS;

D O I：

10.1103/PhysRevC.96.024905

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：

The STAR Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum hadron trigger, in central and peripheral Au + Au collisions at root s(NN) = 200 GeV. Charged jets are reconstructed with the anti-kT algorithm for jet radii R between 0.2 and 0.5 and with low infrared cutoff of track constituents (p(T) > 0.2 GeV/c). A novel mixed-event technique is used to correct the large uncorrelated background present in heavy ion collisions. Corrected recoil jet distributions are reported at midrapidity, for charged-jet transverse momentum p(T,jet)(ch) < 30 GeV/c. Comparison is made to similar measurements for Pb + Pb collisions at root s = 2.76 TeV, to calculations for p + p collisions at root s = 200 GeV based on the PYTHIA Monte Carlo generator and on a next-to-leading order perturbative QCD approach, and to theoretical calculations incorporating jet quenching. The recoil jet yield is suppressed in central relative to peripheral collisions, with the magnitude of the suppression corresponding to medium-induced charged energy transport out of the jet cone of 2.8 +/- 0.2(stat) +/- 1.5(sys) GeV/c, for 10 < p(T,jet)(ch) < 20 GeV/c and R = 0.5. No medium-induced change in jet shape is observed for R < 0.5. The azimuthal distribution of low-p(T,jet)(ch) recoil jets may be enhanced at large azimuthal angles to the trigger axis, due to scattering off quasiparticles in the hot QCD medium. Measurement of this distribution gives a 90% statistical confidence upper limit to the yield enhancement at large deflection angles in central Au + Au collisions of 50 +/- 30( sys)% of the large-angle yield in p + p collisions predicted by PYTHIA.

引用

页数：25

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