Sourav Bhattacharya

collaborators

9 papers

hep-th2026

Effect of $I^¾ R I ¨ ^{2}$ non-minimal coupling on gravitational light bending

Ayan Kumar Naskar, Avijit Sen Majumder, Sourav Bhattacharya

We investigate the bending of massless fields by a massive object in the presence of a curvature-scalar $- g I^¾ R I ¨ ^{2}$ non-minimal coupling up to one loop, using the perturbat…

hep-th2026

Scattering of massive spin-2 field via graviton exchanges with different spin fields and the long range gravitational potential

Avijit Sen Majumder, Sourav Bhattacharya

In this work, we compute the graviton mediated scattering amplitude of a massive spin-2 Fierz-Pauli field with various other massive spin fields, and in the non-relativistic limit,…

hep-th2026

Yukawa scalar self energy at two loop and $⟨ I ¨ ^{2} ⟩$ in the inflationary de Sitter spacetime

Sourav Bhattacharya, Moutushi Dutta Choudhury

We have considered the Yukawa theory at two loop in the inflationary de Sitter spacetime, for a massless minimally coupled scalar and a massless fermion. The one loop computation f…

hep-th2026

$I^¾ R I ¨ ^{2}$ non-minimal coupling, and the long range gravitational potential for different spin fields from 2-2 scattering amplitudes

Avijit Sen Majumder, Ayan Kumar Naskar, Sourav Bhattacharya

In this paper we investigate the long range gravitational effect of curvature-scalar field non-minimal coupling, in the form of $I^¾ R I ¨ ^{2}$ , in the perturbative quantum gravity fram…

hep-th2026

$I^¾ R I ¨ ^{2}$ coupling, cosmological constant and quantum gravitational correction to Newton's potential

Avijit Sen Majumder, Sourav Bhattacharya

This letter investigates the contribution of the $- g I^¾ R I ¨ ^{2}$ interaction to the long range gravitational potential for massive scalar fields, from the non-relativistic limit…

hep-th2025

Effective action for $I ¨ ^{4}$ -Yukawa theory via 2PI formalism in the inflationary de Sitter spacetime

Sourav Bhattacharya, Kinsuk Roy

We consider a scalar field theory with quartic self interaction, Yukawa coupled to fermions in the inflationary de Sitter spacetime background. The scalar has a classical backgroun…

Effect of I^¾RI¨2 non-minimal coupling on gravitational light bending

Scattering of massive spin-2 field via graviton exchanges with different spin fields and the long range gravitational potential

Yukawa scalar self energy at two loop and ⟨I¨2⟩ in the inflationary de Sitter spacetime

I^¾RI¨2 non-minimal coupling, and the long range gravitational potential for different spin fields from 2-2 scattering amplitudes

I^¾RI¨2 coupling, cosmological constant and quantum gravitational correction to Newton's potential

Effective action for I¨4-Yukawa theory via 2PI formalism in the inflationary de Sitter spacetime

Effect of $I^¾ R I ¨ ^{2}$ non-minimal coupling on gravitational light bending

Yukawa scalar self energy at two loop and $⟨ I ¨ ^{2} ⟩$ in the inflationary de Sitter spacetime

$I^¾ R I ¨ ^{2}$ non-minimal coupling, and the long range gravitational potential for different spin fields from 2-2 scattering amplitudes

$I^¾ R I ¨ ^{2}$ coupling, cosmological constant and quantum gravitational correction to Newton's potential

Effective action for $I ¨ ^{4}$ -Yukawa theory via 2PI formalism in the inflationary de Sitter spacetime