arXiv subjects

Seiji Mukaigawa

Publications and source records attributed to Seiji Mukaigawa.

3 recordsLinked to original sources

arXiv1999

Structure of Chiral Phase Transitions at Finite Temperature in Abelian Gauge Theories

The mechanism of the chiral symmetry breaking is investigated in the strong-coupling Abelian gauge theories at finite temperature. The Schwinger-Dyson equation in Landau gauge is employed in the real time formalism and is solved numerically within the framework of the instantaneous exchange approximation including the effect of the hard thermal loop for the photon propagator. It is found that the chiral symmetry is broken below the critical temperature T for sufficiently large coupling. The chiral phase transition is found to be of the 2nd order and the phase diagram on the $T-α$ plane is obtained. It is investigated how the structure of the chiral phase transition is affected by the hard thermal loops in the photon propagator.

hep-ph↗

arXiv1997

Finite Grand Unified Theories and Inflation

A class of finite GUTs in curved spacetime is considered in connection with the cosmological inflation scenario. It is confirmed that the use of the running scalar-gravitational coupling constant in these models helps realizing a successful chaotic inflation. The analyses are made for some different sets of the models.

hep-ph↗

arXiv1996

One loop renormalization of the 4-D Quantum Dilaton Gravity in Spherical symmetric background

We study the one loop renormalization in the most general metric-dilaton theory with second derivative only. In constant background dilaton theory, there are two types of gravity background which enable the theory renormalizable at one-loop level. We show this concretely to discuss on the spherical symmetric background.

hep-th↗