120475092
Consequences of Quark-Hadron Phase Transition in Dense Stars
The deconfinement phase transition in a rotating compact star and its consequences on neutrino emission have been studied. It has been found that rotating twin star solutions are obtained upto Ω ≈ 4000s−1. For faster rotating stars no twin solution is obtained. The neutrino emission shows a strong directionality.
119328473
QCD phase transition in rotating neutron star, neutrino beaming and gamma-ray bursters
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 the size of such a mixed phase is small. Annihilation of neutrinos to produce gamma rays has been discussed. The estimated duration of the burst is found to be within the observational range.
45361532
Hadron masses at finite density from the Zimanyi-Moskowski model.
18727756
Kaon mass in dense matter
Abstract The variation of kaon mass has been investigated in dense nuclear matter, both symmetric as well as asymmetric matter in beta equilibrium. The baryon interaction has been included by means of the nonlinear Walecka model and the interaction of kaons with baryons has been incorporated through the Kaplan-Nelson model. A self-consistent calculation up to the fourth power of 1 f has been carried out. We find that the loop diagrams tend to lower the kaon condensation point for decreasing values of a 3 m s , i.e., higher strangeness content of the proton.
119273334
GENERAL RELATIVISTIC EFFECT ON THE ENERGY DEPOSITION RATE FOR NEUTRINO PAIR ANNIHILATION ABOVE THE EQUATORIAL PLANE ALONG THE SYMMETRY AXIS NEAR A ROTATING NEUTRON STAR
The estimate of the energy deposition rate (EDR) for neutrino pair annihilation has been carried out. The EDR for the neutrinos coming from the equatorial plane of a rotating neutron star is calculated along the rotation axis using the Cook–Shapiro–Teukolsky metric. The neutrino trajectories and hence the neutrinos emitted from the disk are affected by the redshift due to disk rotation and gravitation. The EDR is very sensitive to the value of the temperature and its variation along the disk. The rotation of the star has a negative effect on the EDR; it decreases with increase in rotational velocity.
117589122
In-medium effects on the {phi} meson
The temperature dependence of the {phi} meson mass and its decay width ({phi}{r_arrow}K{bar K}) have been studied from an effective nonlinear chiral Lagrangian in SU(3). The effective mass has been obtained from the pole position of the full propagator. The width has also been calculated. It has been found that the mass decreases with temperature very slowly whereas the decay width increases quite sharply. Possible consequences on the QGP signals are discussed. {copyright} {ital 1997} {ital The American Physical Society}
27271627
Attractive holographic c-functions
A bstractUsing the attractor mechanism for extremal solutions in N=2$$ \mathcal{N}=2 $$ gauged supergravity, we construct a c-function that interpolates between the central charges of theories at ultraviolet and infrared conformal fixed points corresponding to anti-de Sitter geometries. The c-function we obtain is couched purely in terms of bulk quantities and connects two different dimensional CFTs at the stable conformal fixed points under the RG flow.