Correlation function intercepts for μ˜,q-deformed Bose gas model implying effective accounting for interaction and compositeness of particles

• Published in: Nuclear physics. B 2015-02, Vol.891, p.466-481
• Main Authors: Gavrilik, A.M., Mishchenko, Yu.A.
• Format: Article
• Language: English
• ISSN: 0550-3213; 1873-1562
• DOI: 10.1016/j.nuclphysb.2014.12.017

In the recently proposed two-parameter μ˜,q-deformed Bose gas model (Gavrilik and Mishchenko, 2013) [3], aimed to take effectively into account both compositeness of particles and their interaction, the μ˜,q-deformed virial expansion of the equation of state (EOS) was obtained. In this paper we further explore the μ˜,q-deformation, namely the version of μ˜,q-Bose gas model involving deformed distributions and correlation functions. In the model, we explicitly derive the one- and two-particle deformed distribution functions and the intercept of two-particle momentum correlation function. The results are illustrated by plots, and the comparison with known experimental data on two-pion correlation function intercepts extracted in RHIC/STAR experiments is given. •The μ˜,q-deformed Bose gas model unifies q-Bose gas and μ˜-deformed Bose gas models.•μ˜,q-Bose gas model jointly accounts for compositeness of particles and their interaction.•Within this model we derive μ˜,q-dependent one- and two-particle distribution functions.•Using these, the expression for the two-particle correlation function intercept is obtained.•The results are confronted with data on two-pion intercepts from RHIC/STAR experiments.