Evolution of π0 Suppression in Au plus Au Collisions from √sNN=39 to 200 GeV

被引：46

作者：

Adare, A. ^{[12
]}

Afanasiev, S. ^{[29
]}

Aidala, C. ^{[38
]}

Ajitanand, N. N. ^{[58
]}

Akiba, Y. ^{[52
,53
]}

Akimoto, R. ^{[11
]}

Al-Ta'ani, H. ^{[47
]}

Alexander, J. ^{[58
]}

Angerami, A. ^{[13
,14
]}

Aoki, K. ^{[52
]}

Apadula, N. ^{[1
]}

Aramaki, Y. ^{[11
,52
]}

Asano, H. ^{[35
,52
]}

Aschenauer, E. C. ^{[7
]}

Atomssa, E. T. ^{[1
]}

Awes, T. C. ^{[49
]}

Azmoun, B. ^{[7
]}

Babintsev, V. ^{[24
]}

Bai, M. ^{[6
]}

Bannier, B. ^{[1
]}

Barish, K. N. ^{[8
]}

Bassalleck, B. ^{[46
]}

Bathe, S. ^{[5
,53
]}

Baublis, V. ^{[51
]}

Baumgart, S. ^{[52
]}

Bazilevsky, A. ^{[7
]}

Belmont, R. ^{[62
]}

Berdnikov, A. ^{[55
]}

Berdnikov, Y. ^{[55
]}

Bing, X. ^{[48
]}

Blau, D. S. ^{[34
]}

Boyle, K. ^{[53
]}

Brooks, M. L. ^{[38
]}

Buesching, H. ^{[7
]}

Bumazhnov, V. ^{[24
]}

Butsyk, S. ^{[46
]}

Campbell, S. ^{[1
]}

Castera, P. ^{[1
]}

Chen, C. -H. ^{[1
]}

Chi, C. Y. ^{[13
,14
]}

Chiu, M. ^{[7
]}

Choi, I. J. ^{[25
]}

Choi, J. B. ^{[10
]}

Choi, S. ^{[57
]}

Choudhury, R. K. ^{[4
]}

Christiansen, P. ^{[40
]}

Chujo, T. ^{[61
]}

Chvala, O. ^{[8
]}

Cianciolo, V. ^{[49
]}

Citron, Z. ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

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

[3] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

[4] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

[5] CUNY, Baruch Coll, New York, NY 10010 USA

[6] Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11973 USA

[7] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

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

[9] Charles Univ Prague, CR-11636 Prague, Czech Republic

[10] Chonbuk Natl Univ, Jeonju 561756, South Korea

[11] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan

[12] Univ Colorado, Boulder, CO 80309 USA

[13] Nevis Labs, Irvington, NY 10533 USA

[14] Columbia Univ, New York, NY 10027 USA

[15] Czech Tech Univ, Prague 16636 6, Czech Republic

[16] CEA Saclay, F-91191 Gif Sur Yvette, France

[17] Debrecen Univ, H-4010 Debrecen, Hungary

[18] Eotvos Lorand Univ, ELTE, H-1117 Budapest, Hungary

[19] Ewha Womans Univ, Seoul 120750, South Korea

[20] Florida State Univ, Tallahassee, FL 32306 USA

[21] Georgia State Univ, Atlanta, GA 30303 USA

[22] Hanyang Univ, Seoul 133792, South Korea

[23] Hiroshima Univ, Higashihiroshima 7398526, Japan

[24] Inst High Energy Phys, State Res Ctr Russian Federat, IHEP Protvino, Protvino 142281, Russia

[25] Univ Illinois, Urbana, IL 61801 USA

[26] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[27] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic

[28] Iowa State Univ, Ames, IA 50011 USA

[29] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[30] Helsinki Inst Phys, FI-40014 Jyvaskyla, Finland

[31] Univ Jyvaskyla, FI-40014 Jyvaskyla, Finland

[32] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan

[33] Korea Univ, Seoul 136701, South Korea

[34] Russian Res Ctr, Kurchatov Inst, Moscow 123098, Russia

[35] Kyoto Univ, Kyoto 6068502, Japan

[36] Ecole Polytech, CNRS IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[37] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[38] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[39] Univ Blaise Pascal, CNRS IN2P3, LPC, F-63177 Aubiere, France

[40] Lund Univ, Dept Phys, SE-22100 Lund, Sweden

[41] Univ Maryland, College Pk, MD 20742 USA

[42] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[43] Muhlenberg Coll, Allentown, PA 18104 USA

[44] Myongji Univ, Yongin 449728, Kyonggido, South Korea

[45] Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan

[46] Univ New Mexico, Albuquerque, NM 87131 USA

[47] New Mexico State Univ, Las Cruces, NM 88003 USA

[48] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[49] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[50] Univ Paris 11, CNRS IN2P3, IPN Orsay, F-91406 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 15期

基金：

新加坡国家研究基金会; 美国国家科学基金会; 以色列科学基金会; 日本学术振兴会;

关键词：

INCLUSIVE PROCESSES;

D O I：

10.1103/PhysRevLett.109.152301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutral-pion pi(0) spectra were measured at midrapidity (vertical bar y vertical bar < 0.35) in Au + Au collisions at root s(NN) = 39 and 62.4 GeV and compared with earlier measurements at 200 GeV in a transverse-momentum range of 1 < p(T) < 10 GeV/c. The high-p(T) tail is well described by a power law in all cases, and the powers decrease significantly with decreasing center-of-mass energy. The change of powers is very similar to that observed in the corresponding spectra for p + p collisions. The nuclear modification factors (RAA) show significant suppression, with a distinct energy, centrality, and p(T) dependence. Above p(T) = 7 GeV/c, R-AA is similar for root sNN = 62.4 and 200 GeV at all centralities. Perturbative-quantum-chromodynamics calculations that describe R-AA well at 200 GeV fail to describe the 39 GeV data, raising the possibility that, for the same p(T) region, the relative importance of initial-state effects and soft processes increases at lower energies. The p(T) range where pi(0) spectra in central Au + Au collisions have the same power as in p + p collisions is approximate to 5 and 7 GeV/c for root sNN = 200 and 62.4 GeV, respectively. For the root sNN = 39 GeV data, it is not clear whether such a region is reached, and the x(T) dependence of the x(T)-scaling power-law exponent is very different from that observed in the root sNN = 62 and 200 GeV data, providing further evidence that initial-state effects and soft processes mask the in-medium suppression of hardscattered partons to higher p(T) as the collision energy decreases.

引用

页数：7

共 50 条

[31] Global polarization of Λ hyperons in Au plus Au collisions at √sNN=200 GeV
Adam, J.
Adamczyk, L.
Adams, J. R.
Adkins, J. K.
Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Ajitanand, N. N.
Alekseev, I
Anderson, D. M.
Aoyama, R.
Aparin, A.
Arkhipkin, D.
Aschenauer, E. C.
Ashraf, M. U.
Atetalla, F.
Attri, A.
Averichev, G. S.
Bai, X.
Bairathi, V
Barish, K.
Bassin, A. J.
Behera, A.
Bellwied, R.
Bhasin, A.
Bhati, A. K.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Bordyuzhin, I. G.
Brandenburg, J. D.
Brandin, A., V
Brown, D.
Bryslawskyj, J.
Bunzarovi, I
Butterworth, J.
Caines, H.
Sanchez, M. Calderon de la Barca
Campbell, J. M.
Cebra, D.
Chakaberia, I
Chaloupka, P.
Chang, F-H
Chang, Z.
Chankova-Bunzarova, N.
Chatterjee, A.
Chattopadhyay, S.
Chen, J. H.
Chen, X.
Cheng, J.
PHYSICAL REVIEW C, 2018, 98 (01)
[32] Neutral pion production in Au plus Au collisions at √sNN=200 GeV
Abelev, B. I.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Barannikova, O.
Barnby, L. S.
Baudot, J.
Baumgart, S.
Beavis, D. R.
Bellwied, R.
Benedosso, F.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Biritz, B.
Bland, L. C.
Bnzarov, I.
Bombara, M.
Bonner, B. E.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bruna, E.
Bueltmann, S.
Burton, T. P.
Bystersky, M.
Cai, X. Z.
Caines, H.
de la Barca Sanchez, M. Calderon
Catu, O.
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
PHYSICAL REVIEW C, 2009, 80 (04):
[33] MEASUREMENTS OF KS0, Λ AND Ξ FROM Au plus Au COLLISIONS AT √sNN=7.7, 11.5 AND 39 GeV IN STAR
Zhu, Xianglei
STRANGENESS IN QUARK MATTER 2011, 2012, 5 (02): : 213 - 218
[34] Measurement of π0 and γ in d plus Au collisions at √sNN=200 GeV by PHENIX experiment
Chvala, Ondrej
NUCLEAR PHYSICS A, 2009, 830 : 617C - 618C
[35] K*0 and Σ* production in Au+Au collisions at √sNN=200 GeV and 62.4 GeV
Zhang, Kai
Song, Jun
Shao, Feng-lan
PHYSICAL REVIEW C, 2012, 86 (01):
[36] Ω and φ in Au plus Au collisions at √SNN=200 and 11.5 GeV from a multiphase transport model
Ye, Y. J.
Chen, J. H.
Ma, Y. G.
Zhang, S.
Zhong, C.
CHINESE PHYSICS C, 2017, 41 (08)
[37] Energy dependence of J/ψ production in Au plus Au collisions at √sNN=39, 62.4 and 200 GeV from the STAR experiment
Zha, Wangmei
29TH WINTER WORKSHOP ON NUCLEAR DYNAMICS (WWND2013), 2013, 458
[38] Anomalous φ Meson Suppression in Au plus Au Collisions at √sNN=200 GeV Measured by the PHENIX Experiment at RHIC
Naglis, Maxim
NUCLEAR PHYSICS A, 2009, 830 : 757C - 760C
[39] Nuclear Modification Factor of D0 Meson in Au plus Au Collisions at,√SNN=200 GeV
Xie, Guannan
NUCLEAR PHYSICS A, 2016, 956 : 473 - 476
[40] Measurement of D0 Azimuthal Anisotropy at Midrapidity in Au plus Au Collisions at √SNN=200 GeV
Adamczyk, L.
Adkins, J. K.
Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Ajitanand, N. N.
Alekseev, I.
Anderson, D. M.
Aoyama, R.
Aparin, A.
Arkhipkin, D.
Aschenauer, E. C.
Ashraf, M. U.
Attri, A.
Averichev, G. S.
Bai, X.
Bairathi, V.
Behera, A.
Bellwied, R.
Bhasin, A.
Bhati, A. K.
Bhattarai, P.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Bordyuzhin, I. G.
Bouchet, J.
Brandenburg, J. D.
Brandin, A. V.
Brown, D.
Bunzarov, I.
Butterworth, J.
Caines, H.
Sanchez, M. Calderon de la Barca
Campbell, J. M.
Cebra, D.
Chakaberia, I.
Chaloupka, P.
Chang, Z.
Chankova-Bunzarova, N.
Chatterjee, A.
Chattopadhyay, S.
Chen, X.
Chen, J. H.
Chen, X.
Cheng, J.
Cherney, M.
Christie, W.
Contin, G.
Crawford, H. J.
PHYSICAL REVIEW LETTERS, 2017, 118 (21)

← 1 2 3 4 5 →