A5002323774- High-Energy Particle Collisions Research
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Statistical Mechanics and Entropy
- Astrophysical Phenomena and Observations
- Black Holes and Theoretical Physics
- Theoretical and Computational Physics
- Muon and positron interactions and applications
- Gas Dynamics and Kinetic Theory
- Neutrino Physics Research
- Physics of Superconductivity and Magnetism
- High-pressure geophysics and materials
- Spectroscopy and Laser Applications
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Fluid Dynamics and Turbulent Flows
- Advanced Thermodynamics and Statistical Mechanics
- Thermal properties of materials
- Magnetic and transport properties of perovskites and related materials
- Scientific Research and Discoveries
- Optical properties and cooling technologies in crystalline materials
- Numerical methods in inverse problems
- Particle Detector Development and Performance
Indian Institute of Technology Bombay
2022-2024
Indian Institute of Technology Roorkee
2017-2021
Siksha O Anusandhan University
2015
University of Kentucky
2007-2013
We report a measurement of the positive muon lifetime to precision 1.0 ppm; it is most precise particle ever measured. The experiment used time-structured, low-energy beam and segmented plastic scintillator array record more than 2×1012 decays. Two different stopping target configurations were employed in independent data-taking periods. combined results give τμ+(MuLan)=2 196 980.3(2.2) ps, 15 times as any previous experiment. gives value for Fermi constant: GF(MuLan)=1.166 378 8(7)×10−5...
We present a detailed report of the method, setup, analysis and results precision measurement positive muon lifetime. The experiment was conducted at Paul Scherrer Institute using time-structured, nearly 100%-polarized, surface beam segmented, fast-timing, plastic scintillator array. employed two target arrangements; magnetized ferromagnetic with ~4 kG internal magnetic field crystal quartz in 130 G external field. Approximately 1.6 x 10^{12} positrons were accumulated together data yield...
We have studied how the equation of state thermal QCD with two light flavours is modified in strong magnetic field by calculating thermodynamic observables hot matter up to one-loop, where affects mainly quark contribution and gluonic part largely unaffected except for softening screening mass due field. To begin effect on thermodynamics, we first calculated pressure a medium limit (SML), at fixed temperature increases faster than increase constant This can be envisaged from dominant scale...
We have explored how the electrical ($\sigma_{\rm el}$) and thermal ($\kappa$) conductivities in a QCD medium get affected weak-momentum anisotropies arising either due to strong magnetic field or asymptotic expansion. This study facilitates understand longevity of through $\sigma_{el}$, Lorenz number Wiedemann-Franz law, validity equilibrium by Knudsen number. calculate solving relativistic Boltzmann transport equation relaxation-time approximation within quasiparticle model at finite T B....
The mean life of the positive muon has been measured to a precision 11 ppm using low-energy, pulsed beam stopped in ferromagnetic target, which was surrounded by scintillator detector array. result, tau(micro)=2.197 013(24) micros, is excellent agreement with previous world average. new average 019(21) micros determines Fermi constant G(F)=1.166 371(6)x10(-5) GeV-2 (5 ppm). Additionally, measurement positive-muon lifetime needed determine nucleon pseudoscalar coupling g(P).
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...
Abstract We have studied the momentum transport properties of a hot and dense QCD matter in presence weak magnetic field by determining shear ( $$\eta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>η</mml:mi> </mml:math> ) bulk $$\zeta <mml:mi>ζ</mml:mi> viscosities relaxation time approximation kinetic theory. The dependence on temperature has been explored B -field) finite chemical potential $$\mu <mml:mi>μ</mml:mi> ). It is observed that both get decreased field,...
We have studied the effects of anisotropies on momentum transport in a strongly interacting matter by coefficients, viz. shear ($\ensuremath{\eta}$) and bulk ($\ensuremath{\zeta}$) viscosities. The could arise either strong magnetic field or preferential expansion, both which are created very early stages ultrarelativistic heavy ion collisions at RHIC LHC. This study is thereby aimed to understand (i) fluidity location transition point through $\ensuremath{\eta}/s$ $\ensuremath{\zeta}/s$...
Received 7 February 2011DOI:https://doi.org/10.1103/PhysRevLett.106.079901© 2011 American Physical Society
We have studied the effect of strong magnetic field on charge and thermal transport properties hot QCD matter at finite chemical potential. For this purpose, we calculated electrical ($\sigma_{\rm el}$) ($\kappa$) conductivities using kinetic theory in relaxation time approximation, where interactions are subsumed through distribution functions within quasiparticle model temperature, This study helps to understand impacts potential local equilibrium by Knudsen number ($\Omega$) $\kappa$...
Abstract We have studied the impact of nonextensivity on transport coefficients related to charge and heat in thermal QCD. For this purpose, electrical ( $$\sigma _\textrm{el}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>σ</mml:mi> <mml:mtext>el</mml:mtext> </mml:msub> </mml:math> ), Hall _\textrm{H}$$ <mml:mtext>H</mml:mtext> $$\kappa $$ <mml:mi>κ</mml:mi> ) Hall-type conductivities are determined using kinetic theory approach association with nonextensive...
We have computed the charge and heat transport coefficients of hot QCD matter by solving relativistic Boltzmann equation using Bhatnagar-Gross-Krook (BGK) model approximation with a modified collision integral in weak magnetic-field regime. This enhances both phenomena which can be understood large values above-mentioned comparison to relaxation integral. also presented comparative study like electrical conductivity (${\ensuremath{\sigma}}_{el}$), Hall (${\ensuremath{\sigma}}_{H}$), thermal...
We have studied the effect of strong magnetic field on viscous properties hot QCD matter at finite chemical potential by calculating shear ($η$) and bulk ($ζ$) viscosities. The viscosities are calculated using kinetic theory in relaxation time approximation. interactions incorporated through quasiparticle masses partons potential. From this study, one can understand effects sound attenuation Prandtl number (Pl), nature flow Reynolds (Rl), relative behavior between viscosity ratio $ζ/η$....
This work focuses on the influence of nonextensivity transport properties related to charge and heat in a magnetized hot QCD medium. We have determined electrical conductivity, Hall thermal conductivity Hall-type using nonextensive Tsallis framework within kinetic theory approach. The deviation parameter q from 1 distribution function expresses degree nonextensivity. is beneficial use, because matter produced heavy ion collisions not exactly locally equilibrated state, rather it may slightly...
In the present work, we have studied how rotation of QGP medium affects transport coefficients and observables in heavy ion collisions. For noncentral collisions, although most angular momentum gets carried away by spectators, there still remains a finite with range velocity, which thus incites produced matter. As result, various properties are likely to be modulated rotation. We calculated observables, such as electrical conductivity, thermal Knudsen number, elliptic flow, specific heat at...
We have studied the charge and heat transport properties of a hot dense QCD matter using novel approximation method within quasiparticle model. Utilizing collision integral for both relaxation time (RTA) Bhatnagar-Gross-Krook (BGK) models, we solved relativistic Boltzmann equation to estimate electrical conductivity thermal conductivity. investigated temperature dependence these coefficients. also provided comparison between our findings those standard RTA BGK models. Further, explored...
The highly energetic particle medium formed in the ultrarelativistic heavy ion collision displays a notable difference temperatures between its central and peripheral regions. This temperature gradient can generate an electric field within medium, phenomenon referred to as Seebeck effect. We have estimated coefficient for dense quark-gluon plasma by using relativistic Boltzmann transport equation recently developed novel relaxation time approximation (RTA) model kinetic theory framework....
We have explored the effect of weak magnetic field on transport charge and heat in hot dense QCD matter by calculating their response functions, such as electrical conductivity, Hall thermal conductivity Hall-type kinetic theory approach. It is found that conductivities decrease, increase with regime, whereas emergence finite chemical potential enhances these coefficients. The effects aforesaid coefficients are more noticeable at low temperatures, but high temperature suppresses effects. As...
We have studied the effects of weak magnetic field and finite chemical potential on transport charge heat in hot QCD matter by estimating their respective response functions, such as electrical conductivity ($σ_{\rm el}$), Hall H}$), thermal ($κ_0$) Hall-type ($κ_1$). The expressions coefficients are obtained solving relativistic Boltzmann equation relaxation time approximation at potential. interactions among partons incorporated through masses. observed that $σ_{\rm el}$ $κ_0$ decrease H}$...
We have studied the momentum transport properties of a hot and dense QCD matter in presence weak magnetic field by determining shear ($η$) bulk ($ζ$) viscosities relaxation time approximation kinetic theory. The dependence $η$ $ζ$ on temperature has been explored ($B$-field) finite chemical potential ($μ$). It is observed that both get decreased field, whereas increases these viscosities, specifically at low temperatures. This study important to understand sound attenuation through Prandtl...