Sabyasachi Ghosh

ORCID: 0000-0003-1212-824X
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About
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Research Areas
  • High-Energy Particle Collisions Research
  • Quantum Chromodynamics and Particle Interactions
  • Particle physics theoretical and experimental studies
  • Quantum, superfluid, helium dynamics
  • Cosmology and Gravitation Theories
  • Pulsars and Gravitational Waves Research
  • High-pressure geophysics and materials
  • Inflammatory Bowel Disease
  • Theoretical and Computational Physics
  • Cold Atom Physics and Bose-Einstein Condensates
  • Microscopic Colitis
  • Advanced Thermodynamics and Statistical Mechanics
  • COVID-19 epidemiological studies
  • Physics of Superconductivity and Magnetism
  • Eosinophilic Esophagitis
  • Total Knee Arthroplasty Outcomes
  • Graphene research and applications
  • Orthopaedic implants and arthroplasty
  • Black Holes and Theoretical Physics
  • Health Systems, Economic Evaluations, Quality of Life
  • Material Dynamics and Properties
  • Fluid Dynamics and Turbulent Flows
  • Inorganic Fluorides and Related Compounds
  • Biosimilars and Bioanalytical Methods
  • Magnetic Bearings and Levitation Dynamics

Ramakrishna Mission Vivekananda Educational and Research Institute
2025

Indian Institute of Technology Bhilai
2018-2024

Takeda (United States)
2021-2024

KLE Technological University
2024

Wrexham Maelor Hospital
2024

IBM (United States)
2024

Midnapore Medical College and Hospital
2019-2021

Tata Institute of Fundamental Research
2021

Hamad Medical Corporation
2020

University of Calcutta
2016-2018

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...

10.1103/physrevd.102.016016 article EN Physical review. D/Physical review. D. 2020-07-22

We have calculated the temperature dependence of shear $\ensuremath{\eta}$ and bulk $\ensuremath{\zeta}$ viscosities quark matter due to quark-meson fluctuations. The thermal width originating from quantum fluctuations quark-$\ensuremath{\pi}$ quark-$\ensuremath{\sigma}$ loops at finite is with formalism real-time field theory. Temperature-dependent constituent-quark meson masses couplings are obtained in Nambu--Jona-Lasinio model. found a nontrivial influence temperature-dependent on...

10.1103/physrevc.93.045205 article EN Physical review. C 2016-04-13

We compute the transport coefficients, namely, coefficients of shear and bulk viscosities as well thermal conductivity for hot dense matter. The calculations are performed within Polyakov quark meson model. estimation is made using Boltzmann kinetic equation relaxation time approximation. energy dependent estimated from scattering, scattering In our calculations, viscosity to entropy ratio coefficient show a minimum at critical temperature, while density exhibits peak this transition...

10.1103/physrevd.97.014005 article EN cc-by Physical review. D/Physical review. D. 2018-01-12

We studied the effect of a strong magnetic field ($B$) on electrical conductivity hot quark matter. The is key transport coefficient determining time dependence and strength fields generated in relativistic heavy-ion collision. A induces Hall anisotropic conduction, phase-space Landau-level quantization and, if sufficiently strong, interferes with prominent QCD phenomena such as dynamical mass generation, likely affecting matter conductivity, which depends strongly masses. To address these...

10.1103/physrevd.102.114015 article EN cc-by Physical review. D/Physical review. D. 2020-12-08

In many applications labeled data is not readily available, and needs to be collected via pain-staking human supervision. We propose a rule-exemplar method for collecting supervision combine the efficiency of rules with quality instance labels. The coupled such that it both natural humans synergistic learning. training algorithm jointly denoises latent coverage variables, trains model through soft implication loss over label variables. denoised trained are used inference. Empirical...

10.48550/arxiv.2004.06025 preprint EN other-oa arXiv (Cornell University) 2020-01-01

Epoxy resin, widely recognized for its durability and chemical resistance, achieves superior performance when reinforced with nanofillers, making it ideal demanding engineering applications. This research aims to explore the...

10.1039/d5ma00173k article EN cc-by Materials Advances 2025-01-01

We have calculated the shear viscosity coefficient $\ensuremath{\eta}$ of strongly interacting matter in relaxation time approximation, where a quasiparticle description quarks with their dynamical masses is considered from Nambu-Jona-Lasinio model. Due to thermodynamic scattering pseudoscalar-type condensate (i.e., pion), nonzero Landau damping will be acquired by propagating quarks. This may obtained cut contribution in-medium self-energy quark-pion loop, which evaluated framework...

10.1103/physrevc.88.068201 article EN Physical Review C 2013-12-03

We have evaluated the shear viscosity of pion gas taking into account its scattering with low mass resonances, $\sigma$ and $\rho$ during propagation in medium. The thermal width (or collisional rate) pions is calculated from $\pi\sigma$ $\pi\rho$ loop diagrams using effective interactions real time formulation finite temperature field theory. A very small value by entropy density ratio ($\eta/s$), close to KSS bound, obtained which approximately matches range values $\eta/s$ used Niemi et...

10.1103/physrevc.89.045201 article EN Physical Review C 2014-04-02

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...

10.1101/2020.05.05.20085902 preprint EN cc-by-nd medRxiv (Cold Spring Harbor Laboratory) 2020-05-08

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...

10.1142/s0218301321300010 article EN International Journal of Modern Physics E 2021-02-01

The discovery of hot and dense quantum chromodynamics (QCD) matter, known as Quark–Gluon Plasma (QGP), is an essential milestone in understanding the finite temperature QCD medium. Experimentalists around world collect unprecedented amount data heavy ion collisions, at Relativistic Heavy Ion Collider (RHIC), Brookhaven National Laboratory (BNL) New York, USA, Large Hadron (LHC), CERN Geneva, Switzerland. experimentalists analyze these to unravel mystery this new phase matter that filled a...

10.1142/s0218301322500975 article EN International Journal of Modern Physics E 2022-10-28

Rotating quarks and hadronic systems, produced in peripheral heavy ion collisions, can experience Coriolis force other forces due to rotational motion. Considering only the effect of force, we have calculated electrical conductivity for nonrelativistic rotating matter using relaxation time approximation under Boltzmann transport equation. A similarity mathematical calculations at finite rotation magnetic fields is exposed, where an equivalence role between on massive particle's motion...

10.1103/physrevc.109.034914 article EN Physical review. C 2024-03-19

In the real-time thermal field theory, standard expression of shear viscosity for nucleonic constituents is derived from two point function viscous stress tensors at finite temperature and density. The width or Landau damping traditionally included in nucleon propagators. This calculated in-medium self-energy different possible pion-baryon loops. dynamical part nucleon-pion-baryon interactions are taken care by effective Lagrangian densities hadronic model. to entropy density ratio component...

10.1103/physrevc.90.025202 article EN Physical Review C 2014-08-07

We have investigated shear viscosity of quark matter in presence a strong uniform magnetic field background where Nambu-Jona-Lasinio model has been considered to describe the magneto-thermodynamical properties medium. In field, coefficient gets split into different components because anisotropy tangential stress fluid. Four can be merged two limit collisional width becomes much lower than its synchrotron frequency. A simplified contact diagram quark-quark interaction estimate small width,...

10.1103/physrevd.100.034024 article EN cc-by Physical review. D/Physical review. D. 2019-08-27

We have evaluated the transport coefficients of quark and hadronic matter in frame work Polyakov-Quark-Meson model. The thermal widths quarks mesons, which inversely control strength these coefficients, are obtained from imaginary part their respective self-energies at finite temperature. Due to threshold conditions self energies, some limited temperature regions phase become relevant for our numerical predictions on grossly agreement with earlier results.

10.1088/1361-6471/aaf256 article EN Journal of Physics G Nuclear and Particle Physics 2018-11-20

We have attempted to build a parametric-based simplified and analytical model map the interaction of quarks gluons in presence magnetic field, which has been constrained by quark condensate thermodynamical quantities like pressure, energy density, etc., obtained from calculation lattice quantum chromodynamics (QCDs). To fulfill that mapping, we assumed parametric temperature field-dependent degeneracy factor, average energy, momentum velocity gluons. Implementing this QCD transport...

10.1142/s0218301321500440 article EN International Journal of Modern Physics E 2021-06-01

Abstract In the present work, we have studied heavy quarkonia potential in hot and magnetized quark gluon plasma. Inverse magnetic catalysis (IMC) effect is incorporated within system through field modified Debye mass by modifying effective masses. We obtained real imaginary part of this new scenario. After evaluation binding energy decay width comment about dissociation temperatures presence field.

10.1140/epjc/s10052-023-11194-7 article EN cc-by The European Physical Journal C 2023-01-17
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