78 research outputs found
Finite size effect on the thermodynamics of a hot and magnetized hadron resonance gas
The thermodynamic properties of a non-interacting ideal Hadron Resonance Gas
(HRG) of finite volume have been studied in the presence of an external
magnetic field. The inclusion of background magnetic field in the calculation
of thermodynamic potential is done by the modification of the dispersion
relations of the charged hadrons in terms of Landau quantization. The
generalized Matsubara prescription has been employed to take into account the
finite size effects in which a periodic (anti-periodic) boundary conditions is
considered for the mesons (baryons). We find significant effects of the
magnetic field as well as system size on the temperature dependence of energy
density, longitudinal and transverse pressure especially in low temperature
regions. The HRG is found to exhibit diamagnetism (paramagnetism) in the low
(high) temperature region whereas the finite size effect is seen to strengthen
the diamagnetic behavior of the medium.Comment: Version Published in Modern Physics Letters
Initial conditions from the shadowed Glauber model
The two component Monte-Carlo Glauber model predicts a knee-like structure in
the centrality dependence of elliptic flow in Uranium+Uranium collisions
at GeV. It also produces a strong anti-correlation between
and in the case of top ZDC events. However, none of these
features have been observed in data. We address these discrepancies by
including the effect of nucleon shadowing to the two component Monte-Carlo
Glauber model. Apart from addressing successfully the above issues, we find
that the nucleon shadow suppresses the event by event fluctuation of various
quantities, e.g. which is in accordance with expectation from
the dynamical models of initial condition based on gluon saturation physics.Comment: version accepted for publication in Physics Letters
Quantum version of transport coefficients in Nambu--Jona-Lasinio model at finite temperature and strong magnetic field
We have estimated parallel and perpendicular components of electrical
conductivity and shear viscosity of quark matter at finite magnetic field and
temperature by using their one-loop Kubo expressions in the framework of
Nambu--Jona-Lasinio (NJL) model. At finite magnetic field, a non-trivial medium
dependence of those quantities can be found. Previously these NJL-profiles have
been addressed in relaxation time approximation, where cyclotron motion of
quarks with medium dependent mass plays the key role. With respect to the
earlier estimations, the present work provides further enriched profiles via
Kubo framework, where field theoretical descriptions of quark transport with
medium dependent mass and (Landau) quantized energy have been identified as the
key ingredients. Hence the present study can be considered as the complete
quantum field theoretical description of the transport coefficients in the
framework of NJL model at finite temperature and magnetic field.Comment: 16 pages, 2 figure
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