204 citations · 1.4k across the 31 of their papers we have counts for
32 papers
Vector-Meson Spin Alignment from Anisotropic Quark or Hadron Coalescence
Wen-Bo Dong, Xin-Li Sheng, Yi-Liang Yin +2
The distribution of particles is highly anisotropic in the initial stage of a heavy-ion collision. In this paper we demonstrate that this anisotropy induces a sizable effect on the…
Hyperon spin correlation in high-energy heavy-ion collisions
Xin-Li Sheng, Xiang-Yu Wu, Dirk H. Rischke +1
Recent experimental data show an unexpectedly large spin alignment of mesons in high-energy heavy-ion collisions, which can be explained by short-distance fluctuations of stron…
Spin alignment of vector mesons in heavy-ion collision
Xin-Li Sheng, Qun Wang
We give a brief review on the spin alignment induced by the strong field and the shear-stress tensor. In experiments, a significant positive deviation from 1/3 is observed for the…
Vector meson's spin alignments in high energy reactions
Jin-Hui Chen, Zuo-Tang Liang, Yu-Gang Ma +2
The global spin alignment of vector mesons has been observed by the STAR collaboration at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL). It pro…
Global polarization and spin alignment in heavy-ion collisions: past, present and future
Wen-Bo Dong, Xin-Li Sheng, Yi-Liang Yin +1
We give a brief overview on global polarization and spin alignment in heavy ion collisions. The current theoretical understandings on global polarization of hyperons and the global…
Linear response theory for spin alignment of vector mesons in thermal media
Wen-Bo Dong, Yi-Liang Yin, Xin-Li Sheng +2
We present a calculation of the spin alignment for unflavored vector mesons in thermalized quark-gluon plasma based on the Kubo formula in linear response theory. This is achieved…
Momentum dependence of meson's spin alignment
Xin-Li Sheng, Shi Pu, Qun Wang
We study the rapidity and azimuthal angle dependences of the global spin alignment for mesons with respect to the reaction plane in Au+Au collisions at RHIC by the rel…
Dynamical Effects of Magnetic Opacity in Neutron Star Accretion Columns
Xin Sheng, Lizhong Zhang, Omer Blaes +1
We present relativistic, radiation magnetohydrodynamic simulations of supercritical neutron star accretion columns in Cartesian geometry, including temperature-dependent, polarizat…
Electric and magnetic conductivities in magnetized fermion systems
Hao-Hao Peng, Xin-Li Sheng, Shi Pu +1
In Wigner function approach with relaxation time approximation, we calculate electric and magnetic conductivities of a fermion system in the strong magnetic field. The linear respo…
Mass splitting and spin alignment for mesons in a magnetic field in NJL model
Xin-Li Sheng, Shu-Yun Yang, Yao-Lin Zou +1
Based on the Nambu-Jona-Lasinio (NJL) model, we develop a framework for calculating the spin alignment of vector mesons and applied it to study mesons in a magnetic field. We c…
Relativistic spin dynamics for vector mesons
Xin-Li Sheng, Lucia Oliva, Zuo-Tang Liang +2
We propose a relativistic theory for spin density matrices of vector mesons based on Kadanoff-Baym equations in the closed-time-path formalism. The theory puts the calculation of s…
Spin alignment of vector mesons in heavy-ion collisions
Xin-Li Sheng, Lucia Oliva, Zuo-Tang Liang +2
Polarized quarks and antiquarks in high-energy heavy-ion collisions can lead to the spin alignment of vector mesons formed by quark coalescence. Using the relativistic spin Boltzma…
Lorentz transformation in Maxwell equations for slowly moving media
Xin-Li Sheng, Yang Li, Shi Pu +1
We use the method of field decomposition, a technique widely used in relativistic magnetohydrodynamics, to study the small velocity approximation (SVA) of the Lorentz transformatio…
Lorentz-covariant kinetic theory for massive spin-1/2 particles
Xin-Li Sheng, Qun Wang, Dirk H. Rischke
We construct a matrix-valued spin-dependent distribution function (MVSD) for massive spin-1/2 fermions and study its properties under Lorentz transformations. Such transformations…
Charge-dependent directed flows in heavy-ion collisions by Boltzmann-Maxwell equations
Jun-Jie Zhang, Xin-Li Sheng, Shi Pu +4
We have calculated the directed flow and charge-dependent directed flow for pions and protons in Au+Au collisions at GeV by solving the coupled…
Improved quark coalescence model for spin alignments of vector mesons
Xin-Li Sheng
We propose an improved quark coalescence model for spin alignment of vector mesons by spin density matrix with phase space dependence. Within this model we propose an understanding…
Ideal spin hydrodynamics from Wigner function approach
Hao-Hao Peng, Jun-Jie Zhang, Xin-Li Sheng +1
Based on the Wigner function in local equilibrium, we derive hydrodynamical quantities for a system of polarized spin-1/2 particles: the particle number current density, the energy…
Space-average electromagnetic fields and EM anomaly weighted by energy density in heavy-ion collisions
Irfan Siddique, Xin-Li Sheng, Qun Wang
We study the space-average electromagnetic (EM) fields weighted by the energy density in the central regions of heavy ion collisions. These average quantities can serve as a barome…
From Kadanoff--Baym to Boltzmann equations for massive spin-1/2 fermions
Xin-Li Sheng, Nora Weickgenannt, Enrico Speranza +2
We derive Boltzmann equations for massive spin-1/2 fermions with local and nonlocal collision terms from the Kadanoff--Baym equation in the Schwinger--Keldysh formalism, properly a…
Derivation of the nonlocal collision term in the relativistic Boltzmann equation for massive spin-1/2 particles from quantum field theory
Nora Weickgenannt, Enrico Speranza, Xin-li Sheng +2
We derive the Boltzmann equation and the collision kernel for massive spin-1/2 particles, using the Wigner-function formalism and employing an expansion in powers of . The p…
Electromagnetic fields from the extended Kharzeev-McLerran-Warringa model in relativistic heavy-ion collisions
Yi Chen, Xin-Li Sheng, Guo-Liang Ma
Based on the Kharzeev-McLerran-Warringa (KMW) model that estimates strong electromagnetic (EM) fields generated in relativistic heavy-ion collisions, we generalize the formulas of…
Improved quark coalescence model for spin alignment and polarization of hadrons
Xin-Li Sheng, Qun Wang, Xin-Nian Wang
We propose an improved quark coalescence model for spin alignment of vector mesons and polarization of baryons by spin density matrix with phase space dependence. The spin density…
Generating spin polarization from vorticity through nonlocal collisions
Nora Weickgenannt, Enrico Speranza, Xin-li Sheng +2
We derive the collision term in the Boltzmann equation using the equation of motion for the Wigner function of massive spin-1/2 particles. To next-to-lowest order in it con…
Kinetic theory with spin: From massive to massless fermions
Xin-Li Sheng, Qun Wang, Xu-Guang Huang
We find that the recently developed kinetic theories with spin for massive and massless fermions are smoothly connected. By introducing a reference-frame vector, we decompose the d…