Effect of the Wood-Saxon nucleon distribution on the chiral magnetic field in relativistic heavy-ion collisions

Abstract

The formation of the QCD vacuum with nonzero winding number ${Q}_{w}$ during relativistic heavy-ion collisions breaks the parity and charge-parity symmetry. A new kind of field configuration can separate charge in the presence of a background magnetic field---the ``chiral magnetic effect.'' The strong magnetic field and the QCD vacuum can both completely be produced in the noncentral nuclear-nuclear collision. Based on the theory of Kharzeev, McLerran, and Warringa, we use the Wood-Saxon nucleon distribution to replace that of the uniform distribution to improve the magnetic field calculation method of the noncentral collision. The chiral magnetic field distribution at Large Hadron Collider (LHC) energy regions are predicted. We also calculate the contributions to the magnetic field of the total charge given by produced quarks.