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Search Results: 1 - 10 of 1409 matches for " Abhijit Bhattacharyya "
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$ρ- ω$ Mixing at High Temperature and Density
Abhijit Bhattacharyya
Physics , 1998, DOI: 10.1142/S0217732398002746
Abstract: The temperature and density dependence of the $\rho-\omega$ mixing amplitude has been studied from a purely hadronic model. The in-medium baryon masses and chemical potentials have been obtained at the Mean Field (MF) Level and these results have been used to calculate the mixing amplitude. It has been observed that the mixing amplitude changes substantially at high temperature and density.
Temperature Dependence of Hadron Masses from the Zimanyi-Moszkowski Model
Abhijit Bhattacharyya,Sibaji Raha
Physics , 1996,
Abstract: An extended version of the Zimanyi-Moskowski (ZM) model has been used to calculate the temperature dependence of the hadronic masses. The calculation of meson masses in the Random Phase Approximation (RPA) gives an increase in the $\sigma$, $\omega$ and $\pi$ effective masses with temperature.
Thermal Response of an Isolated Rectangular, Layered Nickel-Titanium Shape Memory Alloy Thin Film with Variable Material Properties
Mehmet M. Ozturk,Abhijit Bhattacharyya
Lecture Notes in Engineering and Computer Science , 2013,
Model study of hot and dense baryonic matter
Abhijit Bhattacharyya,Sanjay K. Ghosh
Physics , 1997, DOI: 10.1142/S0218301398000269
Abstract: The properties of baryonic matter have been investigated at finite density and temperature using different models. The variation of baryon masses and fractional number densities with baryon density and temperature obtained from different models have been compared. The quark hadron phase transition have been studied using Chiral Colour Dieletric (CCD) model in the quark sector. No phase transition has been seen for the different variants of the Zimanyi-Moszkowski model. However, a phase transition is observed for the linear and non-linear Walecka model.
A First Principles Study Of Cu Clusters
Aninda Jiban Bhattacharyya,Abhijit Mookerjee,A. K. Bhattacharyya
Physics , 2000,
Abstract: In this communication we study the equilibrium shapes and energetics of Cu clusters of various sizes upto 20 atoms using the Full-Potential Tight Binding Muffin-tin Orbitals Molecular Dynamics. We compare our results with earlier works by physicists and chemists using different methodologies.
Deconfinement Phase Transition in Compact Stars : Maxwell vs. Gibbs Construction of the Mixed Phase
Abhijit Bhattacharyya,Igor N. Mishustin,Walter Greiner
Physics , 2009, DOI: 10.1088/0954-3899/37/2/025201
Abstract: We study different realisations of the first order deconfinement phase transition inside a compact star by comparing the Gibbs and Maxwell construction for the mixed phase. The hadronic sector is described within the relativistic mean field model including hyperons. The quark sector is described by the MIT Bag model. We find that these two realisations lead to very different star properties, in particular, the composition of the stellar matter. We also find that for the Maxwell construction there is a sharp discontinuity in the baryon density and the electron chemical potential. We argue that a sharp jump in the elctron chemical potential should lead to the redistribution of electrons and formation of strong electric fields around the discontinuity surface.
Strange baryons, nuclear dripline and shrinkage : A Relativistic Mean Field study
Bipasha Bhowmick,Abhijit Bhattacharyya,G. Gangopadhyay
Physics , 2013, DOI: 10.1142/S0218301313500122
Abstract: Neutron and proton driplines of single-$\Lambda$ and double-$\Lambda$ hypernuclei, $\Xi^{-}$ hypernuclei as well as normal nuclei are studied within a relativistic mean field approach using an extended form of the FSU Gold Lagrangian density. Hyperons are found to produce bound nuclei beyond the normal nuclear driplines. Radii are found to decrease in hypernuclei near the driplines, in line with observations in light $\Lambda$ hypernuclei near the stability valley, The inclusion of a $\Xi^{-}$ introduces a much larger change in radii than one or more $\Lambda$'s.
Bose-Einstein condensation in dense nuclear matter and strong magnetic fields
Prantick Dey,Abhijit Bhattacharyya,Debades Bandyopadhyay
Physics , 2002, DOI: 10.1088/0954-3899/28/8/304
Abstract: Bose-Einstein condensation of antikaons in cold and dense beta-equilibrated matter under the influence of strong magnetic fields is studied within a relativistic mean field model. For magnetic fields $> 5 \times 10^{18}$G, the phase spaces of charged particles are modified resulting in compositional changes in the system. The threshold density of $K^-$ condensation is shifted to higher density compared with the field free case. In the presence of strong fields, the equation of state becomes stiffer than that of the zero field case.
Pion Dissociation In Hot Quark Medium
Abhijit Bhattacharyya,Sanjay K. Ghosh,Sibaji Raha
Physics , 1998,
Abstract: Pion dissociation in a medium of hot quark matter is studied. The decay width of pion is found to be large but finite at temperatures much higher than the so called critical temperature of chiral or deconfinement transition. Consequently, pions should coexist with quarks and gluons at such high temperatures. The result is in agreement with the lattice calculations. The implication of the above result in the study of Quark-Gluon plasma is discussed.
Fluctuation of strongly interacting matter in Polyakov Nambu Jona-Lasinio model in finite volume
Abhijit Bhattacharyya,Rajarshi Ray,Subrata Sur
Physics , 2014, DOI: 10.1103/PhysRevD.91.051501
Abstract: We have estimated the susceptibilities of conserved charges for 2-flavor strongly interacting matter with varying system sizes, using the Polyakov loop enhanced Nambu Jona-Lasinio model. The susceptibilities for vanishing baryon densities are found to show a scaling with the system volume in the hadronic as well as partonic phase. This scaling breaks down for a temperature range of about 30-50 MeV around the cross-over region. Simultaneous measurements of the various susceptibilities may thus indicate how close to the cross-over region the freeze-out occurs for the fireball created in heavy-ion collision experiments.
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