# Effect of inverse magnetic catalysis on conserved-charge fluctuations in a hadron resonance gas model

Mohapatra, Ranjita K. (Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India; Institute of Physics, Bhubaneswar 751005, India; and Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400085, India)

05 February 2019

Abstract: The effect of inverse magnetic catalysis (IMC) has been observed on the conserved charge fluctuations and the correlations along the chemical freeze-out curve in a hadron resonance gas model. The fluctuations and the correlations have been compared with and without charge conservations. The charge conservation plays an important role in the calculation of the fluctuations at nonzero magnetic field and for the fluctuations in the strange charge at zero magnetic field. The charge conservation diminishes the correlations ${\chi }_{\mathrm{BS}}$ and ${\chi }_{\mathrm{QB}}$, but enhances the correlation ${\chi }_{\mathrm{QS}}$. The baryonic fluctuations (second order) at $B=0.25\phantom{\rule{4pt}{0ex}}{\mathrm{GeV}}^{2}$ increases more than two times compared to $B=0$ at higher ${\mu }_{B}$. The fluctuations have been compared at nonzero magnetic field along the freeze-out curve, i.e., along fitted parameters of the chemical freeze-out temperature and chemical potentials, with the fluctuations at nonzero magnetic field along the freeze-out curve with the IMC effect, and the results are very different with the IMC effect. This is clearly seen in the products of different moments ${\sigma }^{2}/M$ and $S\sigma$ of net-kaon distribution.

Published in: Physical Review C 99 (2019)