Revisiting the spin effects induced by thermal vorticity  

作　　者：高建华 杨诗正 Jian-Hua Gao;Shi-Zheng Yang(Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,School of Space Science and Physics,Shandong University,Weihai 264209,China;Institute of Frontier and Interdisciplinary Science,Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Qingdao 266237,China)

机构地区：[1]Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,School of Space Science and Physics,Shandong University,Weihai 264209,China [2]Institute of Frontier and Interdisciplinary Science,Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Qingdao 266237,China

出　　处：《Chinese Physics C》2024年第5期194-208,共15页中国物理C（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China(12175123,11890710,11890713);the Major Program of Natural Science Foundation of ShandongProvince,China(ZR2020ZD30)。

摘　　要：We revisit the spin effects induced by thermal vorticity by calculating them directly from the spin-dependent distribution functions.For spin-1/2 particles,we provide the polarization up to the first order of thermal vorticity and compare it with the usual results calculated from the spin vector.For spin-1 particles,we show that all the non-diagonal elements vanish and there is no spin alignment up to the first order of thermal vortcity.We present the spin alignment at second-order contribution from thermal vorticity.We also show that the spin effects for both Dirac and vector particles receive an extra contribution when the spin direction is associated with the momentum of the particle.

关 键 词：relativistic heavy ion collisions global polarization quark gluon plasma 

分 类 号：O57[理学—粒子物理与原子核物理]