Author

A. Ghoshal

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Preprint Oct 2026

Cosmological Gravitational Wave Collider Physics

Primordial tensor non-Gaussianity can probe massive particles present during inflation. We investigate this possibility in an effective field theory where the massless graviton mixes with the helicity-two mode of an additional massive spin-two field $\sigma_{ij}$ with cubic self-interactions. For constant sound speed,...

Sukannya Bhattacharya, M. Fasiello, A. Ghoshal et al. · 0 citations

Preprint Aug 2026

Exact Lattice Identities and Continuum-Limit Dyson--Schwinger Equations for Yang-Mills Theory

Starting from SU(N) on the lattice, we give a rigorous derivation of the Dyson--Schwinger equations in the continuum limit. We formulate the Dyson--Schwinger identities for the lattice Yang--Mills theory directly in terms of the link variables $U_\mu(m)\in SU(N)$, exploiting the invariance of the Haar measure under lef...

Arpan Chatterjee, M. Frasca, A. Ghoshal et al. · 0 citations

Preprint Sep 2026

Primordial Black Hole Assisted Dirac Leptogenesis

Dirac leptogenesis offers a qualitatively different route to the baryon asymmetry: total lepton number is conserved, but equal and opposite asymmetries are stored in the Standard Model and right handed neutrino sectors, with only the visible component processed by electroweak sphalerons. We present the first dedicated...

Marco Manno, A. Ghoshal · 0 citations