Browsing Dr. Sanjay Kumar Ghosh by Title
Now showing items 1-17 of 17
-
Aerosol Chemistry Over a High Altitude Station at Northeastern Himalayas, India
(PLoS One, 2010-06-16)Background: There is an urgent need for an improved understanding of the sources, distributions and properties of atmospheric aerosol in order to control the atmospheric pollution over northeastern Himalayas where rising ... -
Colour entangled orphan quarks and dark energy from cosmic QCD phase transition
(ELSEVIER SCIENCE BV, 2006-08-07)No abstract available -
A consistent quasiparticle picture of quark-gluon plasma and the velocity of sound
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2006-09-07)A thermodynamically consistent density dependent quark mass model has been used to study the velocity of sound in a hot quark-gluon plasma. The results are compared with the recent lattice data. -
Conversion of a neutron star to a strange star: A two-step process
(AMERICAN PHYSICAL SOC, 2006-12-01)The conversion of a neutron star to a strange star is studied. Such a transition may be viewed as a two-step process in which the hadronic matter first gets converted to two-flavor quark matter, which, in turn, converts ... -
The Cosmic QCD Phase Transition, Quasi-baryonic Dark Matter and Massive Compact Halo Objects
(arXiv.org, 2002-06-20)We propose that the cold dark matter (CDM) is composed entirely of quark matter, arising from a cosmic quark-hadron transition. We denote this phase as "quasibaryonic", distinct from the usual baryons. We show that compact ... -
Cosmological dark energy from the cosmic QCD phase transition and colour entanglement
(ELSEVIER SCIENCE BV, 2005-03-31)Recent astrophysical observations indicate that the universe is composed of a large amount of dark energy (DE) responsible for an accelerated expansion of the universe, along with a sizeable amount of cold dark matter ... -
Explaining GRB in the Light of Energy Deposition Rate for v+ (v)over-bar -> e(+) + e(-) in a Compact Star
(Indian Assoc Cultivation Science, 2010-12-01)We have studied the e e energy deposition rate near a rotating compact star which is important for the study of gamma ray bursts (GRB). The General relativistic (GR) and rotational effects increase the efficiency of the ... -
General relativistic effects on the conversion of nuclear to two-flavor quark matter in compact stars
(AMER PHYSICAL SOC, 2007-11-19)We investigate the general relativistic (GR) effects on the conversion from nuclear to two-flavor quark matter in compact stars, both static as well as rotating. We find that GR effects lead to qualitative differences in ... -
Investigation of the phase diagram and bulk thermodynamic properties using the Polyakov–Nambu–Jona-Lasinio model with eight-quark interactions
(Amer Physical Soc, 2010-07-30)We present the bulk thermodynamic properties and phase diagram of strongly interacting matter in an extension of the 3-flavor Nambu-Jona-Lasinio(NJL) and Polyakov-Nambu-Jona-Lasinio(PNJL) models of QCD. Using a three-momentum ... -
Polyakov-Nambu-Jona-Lasinio model with a Vandermonde term
(Elsevier B.V., 2008-05-29)We extend the Polyakov-Nambu-Jona-Lasinio model for two degenerate flavors by including the effect of the SU(3) measure with a Vandermonde term. This ensures that the Polyakov loop always remains in the domain [0, 1]. The ... -
QCD phase transition in rotating neutron star, neutrino beaming and gamma-ray bursters
(ELSEVIER SCIENCE BV, 2006-04-13)We have studied the emission of neutrinos from a rotating hybrid star. We find that the emission is predominantly confined to a very small angle, provided the core of the star is in a mixed phase of quarks and hadrons and ... -
QGP Susceptibilities from PNJL Model
(Indian Assoc Cultivation Science, 2011-01-01)An improved version of the PNJL model is used to calculate various thermodynamical quantities including Quark Number Susceptibility, Isospin susceptibility, specific heat, speed of sound and conformal measure. Comparison ... -
Role of in-medium hadrons in photon-nucleus reactions: Shadowing and dilepton spectrum
(IOP PUBLISHING LTD, 2004-12-01)We study the effect of in-medium hadronic properties in photon-nucleus interactions in the context of shadowing as well as the dilepton spectrum for incident photon energies in the range 1.1-3 GeV. A reasonable agreement ... -
Rotating quark star in chiral colour dielectric model
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2007-05-10)The properties of rotating quark star are studied using the equation of state obtained from chiral colour dielectric model. The results are compared with those obtained from MIT bag model equation of state. The frequencies ... -
Rotating twin stars and signature of quark-hadron phase transition
(AMERICAN PHYSICAL SOC, 2005-04-01)The quark-hadron phase transition in a rotating compact star has been studied. The NLZ (nonlinear consistent zero point energy) model has been used for the hadronic sector and the MIT bag model has been used for the quark ... -
Susceptibilities and speed of sound from the Polyakov-Nambu-Jona-Lasinio model
(AMERICAN PHYSICAL SOC, 2006-06-01)We present the Taylor expansion coefficients of the pressure in quark number chemical potential mu(0)=mu(B)/3=mu(u)=mu(d), for the strongly interacting matter as described by the Polyakov-Nambu-Jona-Lasinio (PNJL) model ...