AUTHOR=Wang Shi-Yao , Zhang Wei-Ning 

TITLE=Investigating Effect of Coherent Emission Length on Pion Interferometry in High-Energy Collisions Using a Multiphase Transport Model

JOURNAL=Frontiers in Physics

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.835592

DOI=10.3389/fphy.2022.835592

ISSN=2296-424X

ABSTRACT=In this paper, the two-pion Hanbury Brown-Twiss correlation functions for a partially
coherent source constructed with the emission points and momenta of the identical pions 
generated by a multi-phase transport model are studied. A coherent emission length is introduced,
the effects of which on the two-pion interferometry results in central Au-Au collisions at $\sqrt{s_{NN}}=200$~GeV, central Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$~TeV, and
p-p collisions at $\sqrt{s}=13$~TeV are investigated.
It is found that the effect of coherent emission length reduces the two-pion
correlation functions in the nucleus-nucleus collisions, leading to an average decrease
of the chaoticity parameter by approximately 15\% in the high-transverse-momentum
range. However, the influence of coherent emission length on the two-pion correlation
functions in the p-p collisions is small, while the effect of coherent emission
length on the chaoticity parameter is almost independent of the transverse momentum
of pion pair in the p-p collisions.