151 citations
- Barasat Government College4 papers
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5 papers · 1 filter
Thin Shell Wormhole in Heterotic String Theory
F. Rahaman, M. Kalam, S. Chakraborti
Using 'Cut and Paste' technique, we develop a thin shell wormhole in heterotic string theory. We determine the surface stresses, which are localized in the shell, by using Darmois-…
Wormhole with varying cosmological constant
F. Rahaman, M. Kalam, M. Sarker +2
It has been suggested that the cosmological constant is a variable dynamical quantity. A class of solution has been presented for the spherically symmetric space time describing wo…
New signals of a R-parity violating model of neutrino mass at the Tevatron
Amitava Datta, Sujoy Poddar
In a variety models of neutrino masses and mixings the lighter top squark decays into competing R - parity violating and R - parity conserving channels. Using Pythia we have estima…
Scenarios of cosmic string with variable cosmological constant
Saibal Ray, Farook Rahaman, Utpal Mukhopadhyay
Exact solutions of the Einstein field equations with cosmic string and space varying cosmological constant, viz., , in the energy-momentum tensors are presented. Three cas…
Brane world solutions of perfect fluid in the background of a bulk containing dust or cosmological constant
Tanwi Bandyopadhyay, Subenoy Chakraborty, Asit Banerjee
The paper presents some solutions to the five dimensional Einstein equations due to a perfect fluid on the brane with pure dust filling the entire bulk in one case and a cosmologic…