Adiabatic hydrodynamization in rapidly-expanding quark-gluon plasma

doi:10.1016/j.physletb.2021.136189

	Adiabatic hydrodynamization in rapidly-expanding quark-gluon plasma
	Brewer, Jasmine 2; Yan, Li 3,4; Yin, Yi 1,2,5
刊名	PHYSICS LETTERS B
	2021-05-10
卷号	816 页码:6
ISSN号	0370-2693
DOI	10.1016/j.physletb.2021.136189
通讯作者	Brewer, Jasmine(jtbrewer@mit.edu)
英文摘要	We propose a new scenario characterizing the transition of the quark-gluon plasma (QGP) produced in heavy-ion collisions from a highly non-equilibrium state at early times toward a fluid described by hydrodynamics at late times. We develop an analogy to the evolution of a quantum mechanical system that is governed by the instantaneous ground states. In the simplest case, these slow modes are "pre-hydrodynamic" in the sense that they are initially distinct from, but evolve continuously into, hydrodynamic modes. For a class of collision integrals, the pre-hydrodynamic mode represents the angular distribution (in momentum space) of those gluons that carry most of the energy. We illustrate this scenario using a kinetic description of weakly-coupled Bjorken expanding plasma. Rapid longitudinal expansion drives a reduction in the degrees of freedom at early times. In the relaxation time approximation for the collision integral, we show quantitatively that the full kinetic theory evolution is dominated by the pre-hydrodynamic mode. We elaborate on the criterion for the dominance of pre-hydrodynamic slow modes and speculate that adiabatic hydrodynamization may describe the pre-equilibrium behavior of the QGP produced in heavy-ion collisions. (C) 2021 The Author(s). Published by Elsevier B.V.
资助项目	Office of Nuclear Physics of the U.S. Department of Energy[DE-SC0011090] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB34000000] ; National Natural Science Foundation of China[11975079]
WOS关键词	FLOW
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000647421500045
资助机构	Office of Nuclear Physics of the U.S. Department of Energy ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137313]
专题	中国科学院近代物理研究所
通讯作者	Brewer, Jasmine
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Quark Matter Res Ctr, Lanzhou 073000, Gansu, Peoples R China 2.MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA 3.Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, 220 Handan Rd, Shanghai 200433, Peoples R China 4.Fudan Univ, Inst Modern Phys, 220 Handan Rd, Shanghai 200433, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Brewer, Jasmine,Yan, Li,Yin, Yi. Adiabatic hydrodynamization in rapidly-expanding quark-gluon plasma[J]. PHYSICS LETTERS B,2021,816:6.
APA	Brewer, Jasmine,Yan, Li,&Yin, Yi.(2021).Adiabatic hydrodynamization in rapidly-expanding quark-gluon plasma.PHYSICS LETTERS B,816,6.
MLA	Brewer, Jasmine,et al."Adiabatic hydrodynamization in rapidly-expanding quark-gluon plasma".PHYSICS LETTERS B 816(2021):6.