19 research outputs found
Effect of inverse magnetic catalysis on conserved charge fluctuations in hadron resonance gas model
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 and , but enhances the correlation
. The baryonic fluctuations (2nd order) at
increases more than two times compared to at higher . 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
and of net-kaon distribution.Comment: 12 pages,10 figures, Accepted by Phys. Rev.
Analyzing flow anisotropies with excursion sets in relativistic heavy-ion collisions
We show that flow anisotropies in relativistic heavy-ion collisions can be
analyzed using a certain technique of shape analysis of excursion sets recently
proposed by us for CMBR fluctuations to investigate anisotropic expansion
history of the universe. The technique analyzes shapes (sizes) of patches above
(below) certain threshold value for transverse energy/particle number (the
excursion sets) as a function of the azimuthal angle and rapidity. Modeling
flow by imparting extra anisotropic momentum to the momentum distribution of
particles from HIJING, we compare the resulting distributions for excursion
sets at two different azimuthal angles. Angles with maximum difference in the
two distributions identify the event plane, and the magnitude of difference in
the two distributions relates to the magnitude of momentum anisotropy, i.e.
elliptic flow.Comment: 5 pages, 4 figure
Transport coefficients of hot and dense hadron gas in a magnetic field: a relaxation time approach
We estimate various transport coefficients of hot and dense hadronic matter
in the presence of magnetic field. The estimation is done through solutions of
the relativistic Boltzmann transport equation in the relaxation time
approximation.We have investigated the temperature and the baryon chemical
potential dependence of these transport coefficients. Explicit calculations are
done for the hadronic matter in the ambit of hadron resonance gas model. We
estimate thermal conductivity, electrical conductivity and the shear viscosity
of hadronic matter in the presence of a uniform magnetic field. Magnetic field,
in general, makes the transport coefficients anisotropic. It is also observed
that all the transport coefficients perpendicular to the magnetic field are
smaller compared to their isotropic counterpart.Comment: 22 pages, 11 figures. arXiv admin note: text overlap with
arXiv:1903.0393