A5090460352- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Quantum, superfluid, helium dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Physics of Superconductivity and Magnetism
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Ionosphere and magnetosphere dynamics
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- Atmospheric Ozone and Climate
- Nuclear physics research studies
- Earthquake Detection and Analysis
- COVID-19 epidemiological studies
- Modeling and Simulation Systems
- Particle accelerators and beam dynamics
- Icing and De-icing Technologies
- Pulsars and Gravitational Waves Research
- Atomic and Molecular Physics
- Air Quality Monitoring and Forecasting
- Water Quality Monitoring and Analysis
- Inorganic Chemistry and Materials
KIIT University
2025
Jan Kochanowski University
2020-2023
National Institute of Science Education and Research
2018-2021
Bose Institute
1968-2018
AGH University of Krakow
2017
University of Calcutta
2014
An intense transient magnetic field is produced in high energy heavy-ion collisions mostly due to the spectator protons inside two colliding nuclei. The introduces anisotropy medium, and hence isotropic scalar transport coefficients become anisotropic split into multiple components. Here, we calculate coefficients' shear, bulk viscosity, electrical conductivity, thermal diffusion for a multicomponent hadron resonance gas (HRG) model nonzero by using Boltzmann equation relaxation time...
We present temperature ($T$) and baryonic chemical potential ($\mu_B$) dependence of higher order fluctuations correlation between conserved charges in Excluded Volume Hadron Resonance Gas (EVHRG) model. Products moments, such as ratio variance to mean ($\sigma^2/M)$, product skewness standard deviation ($S\sigma$), kurtosis ($\kappa\sigma^2$), for net-proton, net-kaon net-charge have been evaluated on the phenomenologically determined freeze-out curve. Further, products moments net-proton...
The thermodynamics of hot and dense matter created in heavy-ion collision experiments are usually studied as a system infinite volume. Here we report on the possible effects considering finite size for such framework hadron resonance gas model. bulk thermodynamic variables well fluctuations conserved charges considered. We find that insignificant once observables scaled with respective volumes. only substantial effect is found electric charge which may therefore be used to extract...
We present a study of the effects magnetic fields on fluctuations and correlations in hadron resonance gas model.We find significant changes net baryon number, electric charge strangeness.This is also reflected various fluctuation ratios along freezeout curve.
The van der Waals interaction is implemented in a hadron resonance gas model. It shown that this model can describe lattice QCD data of different thermodynamical quantities satisfactorily with the parameters $a=1250\ifmmode\pm\else\textpm\fi{}150$ MeV ${\mathrm{fm}}^{3}$ and $r=0.7\ifmmode\pm\else\textpm\fi{}0.05$ fm. Further, liquid-gas phase transition observed critical point at temperature, $T=62.1$ baryon chemical potential, ${\ensuremath{\mu}}_{B}=708$ MeV.
CoVID-19 is spreading throughout the world at an alarming rate. So far it has spread over 200 countries in whole world. Mathematical modelling of epidemic like always useful for strategic decision making, especially very to gain some understanding future densely populous India. We use a simple yet effective mathematical model SIR(D) predict India by using existing data. also estimate effect lock-down/social isolation via time-dependent coefficient model. The study with realistic parameters...
In this article, there are 18 sections discussing various current topics in the field of relativistic heavy-ion collisions and related phenomena, which will serve as a snapshot state art. Section 1 reviews experimental results some recent light-flavored particle production data from ALICE collaboration. Other mostly theoretical nature. Very strong but transient magnetic created could have important observational consequences. This has generated lot activity last decade. Sections 2, 7, 9, 10...
An extension of Hadron Resonance Gas (HRG) model is constructed to include interactions using relativistic virial expansion partition function. The non-interacting part the contains all stable baryons and mesons interacting higher mass resonances which decay into two hadrons. coefficients are related phase shifts calculated K-matrix formalism in present work. We have various thermodynamics quantities like pressure, energy density, entropy density system. A comparison thermodynamic with non...
We investigate systematics of the freezeout surface in heavy ion collisions due to hadron spectrum. The role suspected resonance states that are yet be confirmed experimentally identifying has been investigated. have studied two different schemes: a unified scheme where all hadrons assumed freeze out at same thermal state and flavor-dependent sequential with for or without valence strange quarks. data mean yields as well scaled variance net proton charge distributions analyzed. find...
We have studied the classical and quantum expressions of electrical conductivity their numerical estimation in presence a magnetic field for hadron resonance gas (HRG) massless quark matter. Classical results transport coefficients HRG matter were previously by Dash et al. [Phys. Rev. D 102, 016016 (2020)] using standard relaxation time approximation Boltzmann equation. In same reference, transition from isotropic to anisotropic was also estimated This led an upper limit or Stefan-Boltzmann...
We estimate chemical freeze-out parameters in Hadron Resonance Gas (HRG) and Excluded Volume HRG (EVHRG) models by fitting the experimental information of net-proton net-charge fluctuations measured Au + collisions STAR Collaboration at BNL Relativistic Heavy Ion Collider (RHIC). observe that obtained from lower higher order are almost same for $\sqrt{{s}_{\mathit{NN}}}>27$ GeV, but tend to deviate each other $\sqrt{{s}_{\mathit{NN}}}$. Moreover, these separations increase with decrease...
The equation of state and fluctuations conserved charges in a strongly interacting medium under equilibrium conditions form the baseline upon which are built various possible scenarios relativistic heavy-ion collision experiments. Many these quantities have been obtained lattice QCD framework with reliable continuum extrapolations. Recently Polyakov--Nambu--Jona-Lasinio model has reparametrized to some extent reproduce quantitatively at vanishing chemical potentials. agreement was precise...
We report the effect of including repulsive interactions on various thermodynamic observables calculated using an $S$-matrix based hadron resonance gas (HRG) model applied to already available corresponding results with only attractive [A. Dash, S. Samanta, and B. Mohanty, Phys. Rev. C 97, 055208 (2018)]. The part interaction is by parametrizing two-body phase shifts $K$-matrix formalism, while included fitting experimental which carry information about nature interaction. find that bulk...
We have theoretically investigated the finite system size effect of hadronic matter on its transport coefficients like shear viscosity, bulk and electrical conductivity. used a Hadron Resonance Gas (HRG) model to calculate thermodynamical quantities entropy density, speed sound also above coefficients. All these are found be sensitive effects matter. The is more when at low temperatures gets reduced high temperatures. Owing intimate linking between centrality, we presented centrality...
The transport coefficients of a multicomponent hadronic gas at zero and nonzero baryon chemical potential are calculated using the Chapman-Enskog method. calculations done within framework an $S$-matrix based interacting hadron resonance model. In this model, phase shifts cross sections $K$-matrix formalism where required, by parametrizing experimental shifts. Using energy dependence section, we find temperature various such as shear viscosity, bulk heat conductivity, diffusion coefficient....
We investigate how to include bound states in a thermal gas the context of quantum field theory (QFT). To this end, we use for definiteness scalar QFT with $\varphi^{4}$ interaction, where $\varphi$ represents particle mass $m$. A state $\varphi$-$\varphi$ type is created when coupling constant negative and its modulus larger than certain critical value. contribution pressure system by using $S$-matrix formalism involving derivative phase-shift scattering. Our analysis, which based on an...
The effect of momentum resolution on factorial moments due to the power–law correlation function is studied. study motivated by searching for critical point strongly interacting matter in heavy-ion collisions using intermittency method. We observe that are significantly affected finite resolution. superficially significant compared intuitive expectations. results depend power and number uncorrelated particles.
We study the thermal properties of quantum field theories (QFT) with three-leg interaction vertices $g{\ensuremath{\varphi}}^{3}$ and $gS{\ensuremath{\varphi}}^{2}$ ($\ensuremath{\varphi}$ $S$ being scalar fields), which constitute relativistic counterpart Yukawa potential. follow a nonperturbative unitarized one-loop resummed technique for theory is unitary well defined large range values coupling constant $g$. Using partial wave decomposition two-body scattering we calculate phase shifts,...
An attempt has been made to account for the observed double‐peak amplitude distribution vertically directed radio pulses returned from sporadic E region in terms of double layer that is occasionally formed region.
A noninteracting hadron resonance gas model is used often to study the hadronic phase formed in heavy ion collisions. Interaction among various constituents can be included using an S-matrix-based virial expansion approach. The coefficients require dynamical information about scattering shifts, which compute thermodynamic observables of interacting gas. attractive part shifts are calculated K-matrix formalism while repulsive obtained by fitting experimental data. Calculation variables like...
Lattice computations of strongly interacting matter at finite temperature $T$ and baryon chemical potential $\mu_B$ suggest that the QCD thermodynamics deep in hadronic phase can be adequately modeled by an ideal hadron resonance gas (I-HRG). However, it is not clear where on $(\mu_B, T)$ plane this description breaks down, making essential to account for interactions change nature degrees freedom. We have studied several thermodynamic functions within I-HRG model try identify region diagram...