Squeezed spectra of bosons and antibosons with different in-medium masses

TL;DR

This paper investigates how in-medium mass differences between bosons and antibosons affect their transverse momentum spectra, revealing that larger mass differences lead to more pronounced spectral differences influenced by medium conditions.

Contribution

It introduces a detailed analysis of the impact of in-medium mass differences on boson and antiboson spectra, considering medium temperature and expansion velocity effects.

Findings

Mass difference increases spectral disparity.

Higher medium temperature amplifies mass difference effects.

Spectral differences decrease at high transverse momentum.

Abstract

We study the influence of the in-medium mass difference between boson and antiboson on their spectra. The in-medium mass difference may lead to a difference between the transverse momentum spectra of boson and antiboson. This effect increases with the increasing in-medium mass difference between boson and antiboson. The difference between the transverse momentum spectra of boson and antiboson increases with the increasing expanding velocity of the source and decreases with the increasing transverse momentum in large transverse mass region (mT > 1:6 GeV). The interactions between the hadron and the medium may increase with the increasing temperature of the medium and the higher freeze-out temperature may lead to a larger mass difference between boson and antiboson, and may give rise to a larger difference between the transverse momentum spectra of boson and antiboson for higher freeze-out temperature.