Probing parton dynamics of QCD matter with Omega and phi production

doi:10.1103/PhysRevC.93.021903

	Probing parton dynamics of QCD matter with Omega and phi production
	Adamczyk, L.1; Adkins, J. K.20; Agakishiev, G.18; Aggarwal, M. M.31; Ahammed, Z.49; Alekseev, I.16; Aparin, A.18; Arkhipkin, D.3; Aschenauer, E. C.3; Attri, A.31
刊名	PHYSICAL REVIEW C
	2016-02-24
卷号	93 页码:6
ISSN号	2469-9985
DOI	10.1103/PhysRevC.93.021903
英文摘要	We present measurements of Omega and phi production at midrapidity from Au+Au collisions at nucleon-nucleon center-of-mass energiesv root s(NN) = 7.7, 11.5, 19.6, 27, and 39 GeV by the STAR experiment at the BNL Relativistic Heavy Ion Collider (RHIC). Motivated by the coalescence formation mechanism for these strange hadrons, we study the ratios of N(Omega(-)+Omega(+))/[2N(phi)]. These ratios as a function of transverse momentum p(T) fall on a consistent trend at high collision energies, but start to show deviations in peripheral collisions at root s(NN) = 19.6, 27, and 39 GeV, and in central collisions at 11.5 GeV in the intermediate p(T) region of 2.4-3.6 GeV/c. We further evaluate empirically the strange quark p(T) distributions at hadronization by studying the Omega/phi ratios scaled by the number of constituent quarks (NCQ). The NCQ-scaled Omega/phi ratios show a suppression of strange quark production in central collisions at 11.5 GeV compared to root s(NN) >= 19.6 GeV. The shapes of the presumably thermal strange quark distributions in 0-60% most central collisions at 7.7 GeV show significant deviations from those in 0-10% most central collisions at higher energies. These features suggest that there is likely a change of the underlying strange quark dynamics in the transition from quark matter to hadronic matter at collision energies below 19.6 GeV.
资助项目	RHIC Operations Group at BNL ; RCF at BNL ; NERSC Center at LBNL ; KISTI Center in Korea ; Open Science Grid consortium ; Office of Nuclear Physics within the U.S. DOE Office of Science ; U.S. NSF ; Ministry of Education and Science of the Russian Federation of China ; NNSFC of China ; CAS of China ; MoST (973 Program) of China[2014CB845400] ; MoE of China ; Korean Research Foundation of the Czech Republic ; GA of the Czech Republic ; MSMT of the Czech Republic ; FIAS of Germany ; DAE of India ; DST of India ; UGC of India ; National Science Centre of Poland ; National Research Foundation ; Ministry of Science, Education and Sports of the Republic of Croatia ; RosAtom of Russia
WOS关键词	QUARK-GLUON PLASMA ; MESON PRODUCTION ; FREEZE-OUT ; COLLISIONS ; ENERGY ; STRANGENESS ; DEPENDENCE ; AU
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000370799800001
资助机构	RHIC Operations Group at BNL ; RCF at BNL ; NERSC Center at LBNL ; KISTI Center in Korea ; Open Science Grid consortium ; Office of Nuclear Physics within the U.S. DOE Office of Science ; U.S. NSF ; Ministry of Education and Science of the Russian Federation of China ; NNSFC of China ; CAS of China ; MoST (973 Program) of China ; MoE of China ; Korean Research Foundation of the Czech Republic ; GA of the Czech Republic ; MSMT of the Czech Republic ; FIAS of Germany ; DAE of India ; DST of India ; UGC of India ; National Science Centre of Poland ; National Research Foundation ; Ministry of Science, Education and Sports of the Republic of Croatia ; RosAtom of Russia
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/41908]
专题	中国科学院近代物理研究所
通讯作者	Adamczyk, L.
作者单位	1.AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland 2.Argonne Natl Lab, 9700 S Cass Ave, 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
推荐引用方式 GB/T 7714	Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,et al. Probing parton dynamics of QCD matter with Omega and phi production[J]. PHYSICAL REVIEW C,2016,93:6.
APA	Adamczyk, L..,Adkins, J. K..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,...&Zyzak, M..(2016).Probing parton dynamics of QCD matter with Omega and phi production.PHYSICAL REVIEW C,93,6.
MLA	Adamczyk, L.,et al."Probing parton dynamics of QCD matter with Omega and phi production".PHYSICAL REVIEW C 93(2016):6.