2 papers
hep-ph2000
Baryogenesis through axion domain wall
S. N. Nayak, U. A. Yajnik
Generic axion models give rise to axion domain walls in the early Universe and they have to disappear not to overclose the universe, thus limiting the nature of discrete symmetry a…
hep-ph1997
Thermal Effects on Two-photon Decays of Pseudo-scalars
Sourendu Gupta, S. N. Nayak
We study the effect of finite temperatures and Fermion density on the effective pseudo-scalar-photon vertex induced by the triangle diagram. The manifestly covariant calculations s…