Simulating spin dynamics with spin-dependent cross sections in heavy-ion collisions

Yin Xia, Jun Xu, Bao-An Li, and Wen-Qing Shen
Phys. Rev. C 96, 044618 – Published 23 October 2017

Abstract

We have incorporated the spin-dependent nucleon-nucleon cross sections into a Boltzmann-Uehling-Uhlenbeck transport model for the first time, using the spin-singlet and spin-triplet nucleon-nucleon elastic scattering cross sections extracted from the phase-shift analyses of nucleon-nucleon scatterings in free space. We found that the spin splitting of the collective flows is not affected by the spin-dependent cross sections, justifying it as a good probe of the in-medium nuclear spin-orbit interaction. With the in-medium nuclear spin-orbit mean-field potential that leads to local spin polarization, we found that the spin-averaged observables, such as elliptic flows of free nucleons and light clusters, becomes smaller with the spin-dependent differential nucleon-nucleon scattering cross sections.

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  • Received 3 June 2017

DOI:https://doi.org/10.1103/PhysRevC.96.044618

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Yin Xia1,2,3, Jun Xu1,*, Bao-An Li4,5, and Wen-Qing Shen1

  • 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • 4Department of Physics and Astronomy, Texas A&M University-Commerce, Commerce, Texas 75429-3011, USA
  • 5Department of Applied Physics, Xi'an Jiao Tong University, Xi'an 710049, China

  • *Corresponding author: xujun@sinap.ac.cn

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Issue

Vol. 96, Iss. 4 — October 2017

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