Comprehensive Statistical Analysis of Initial Lorentz Factor and Jet Opening Angle of Gamma-Ray Bursts

Jian Zhang, Bao-Cheng Qin, Lu-Lu Zhang +1

The initial Lorentz factor ($\hat{I}{“}_0$) and jet half-opening angle ($\hat{I}{¸}_{\mathrm{jet}}$) of gamma-ray bursts (GRBs) are critical physical parameters for understanding the dynamical evolut…