Measurement methods of radial flow in relativistic heavy-ion collisions

Authors：Yang, Peng; Li, Lin; Zhou, Yu; Li, Zhiming; Xu, Mingmei; Zhao, Yeyin; Wu, Yuanfang^*

Source：Physical Review C - Nuclear Physics, 2021, 104(1): 014901.

DOI：10.1103/PhysRevC.104.014901

• ANISOTROPIC FLOW
• EXPANSION
• MOMENTUM

Radial flow can be directly extracted from the azimuthal distribution of mean transverse rapidity. We apply the event-plane method and the two-particle correlation method to estimate the anisotropic Fourier coefficient of the azimuthal distribution of mean transverse rapidity. Using the event sample generated by a multiphase transport model with string melting, we show that both methods are effective. For the two-particle correlation method to be reliable, the mean number of particles in an azimuthal bin must be above a certain threshold. Using these two methods, anisotropic radial flow can be estimated in a model-independent way in relativistic heavy-ion collisions.

• Institution
  武汉理工大学