Shear-Induced Spin Polarization in Heavy-Ion Collisions

doi:10.1103/PhysRevLett.127.142301

	Shear-Induced Spin Polarization in Heavy-Ion Collisions
	Fu, Baochi 2,3,4; Liu, Shuai Y. F.5; Pang, Longgang 6,7; Song, Huichao 2,3,4,8; Yin, Yi 1,5
刊名	PHYSICAL REVIEW LETTERS
	2021-09-30
卷号	127 期号:14 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.127.142301
通讯作者	Fu, Baochi(lshphy@gmail.com)
英文摘要	We study the spin polarization generated by the hydrodynamic gradients. In addition to the widely studied thermal vorticity effects, we identify an undiscovered contribution from the fluid shear. This shear-induced polarization (SIP) can be viewed as the fluid analog of strain-induced polarization observed in elastic and nematic materials. We obtain the explicit expression for SIP using the quantum kinetic equation and linear response theory. Based on a realistic hydrodynamic model, we compute the differential spin polarization along both the beam direction (z) over cap and the out-plane direction (y) over cap in noncentral heavy-ion collisions at root s(NN) = 200 GeV, including both SIP and thermal vorticity effects. We find that SIP contribution always shows the same azimuthal angle dependence as experimental data and competes with thermal vorticity effects. In the scenario that Lambda inherits and memorizes the spin polarization of a strange quark, SIP wins the competition, and the resulting azimuthal angle dependent spin polarization P (y) and P- z agree qualitatively with the experimental data.
资助项目	NSFC[12075007] ; NSFC[11675004] ; NSFC[11861131009] ; NSFC[12075098] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB34000000]
WOS关键词	HYPERONS
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000704694100004
资助机构	NSFC ; Strategic Priority Research Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136189]
专题	中国科学院近代物理研究所
通讯作者	Fu, Baochi
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Peking Univ, Dept Phys, Beijing 100871, Peoples R China 3.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 4.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Quark Matter Res Ctr, Inst Modern Phys, Lanzhou 730000, Peoples R China 6.Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China 7.Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China 8.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Fu, Baochi,Liu, Shuai Y. F.,Pang, Longgang,et al. Shear-Induced Spin Polarization in Heavy-Ion Collisions[J]. PHYSICAL REVIEW LETTERS,2021,127(14):6.
APA	Fu, Baochi,Liu, Shuai Y. F.,Pang, Longgang,Song, Huichao,&Yin, Yi.(2021).Shear-Induced Spin Polarization in Heavy-Ion Collisions.PHYSICAL REVIEW LETTERS,127(14),6.
MLA	Fu, Baochi,et al."Shear-Induced Spin Polarization in Heavy-Ion Collisions".PHYSICAL REVIEW LETTERS 127.14(2021):6.