Neighboring azimuthal bin-bin measure for the shear viscosity multiplicity correlation as a direct in relativistic heavy ion collisions

Neighboring azimuthal bin-bin multiplicity correlation is suggested to be a good measure for internal layer-to-layer interactions of the formed matter in relativistic heavy ion collisions.It is shown to be directly related to the shear viscosity of the formed matter.As an application of this method,the shear viscosity in the samples generated by a multi-phase transport model(AMPT) is estimated.The results are in qualitative agreement with the theoretical calculation from microscopic interactions,i.e.,the larger the scattering cross section,the smaller the shear viscosity.