Debadrita Mukherjee | Searcharxiv

arXiv2026

Inverse Area Corrections to Black Hole Entropy Area Formula in F(R) Gravity and Gravitational Wave Observations

We consider corrections to the Bekenstein Hawking Area Formula for black hole entropy, which have inverse powers of the horizon area for very large horizon areas, for classical spherically symmetric black hole solutions of F(R) modified gravity theory, using the Wald formula for the entropy function with modifications suggested by Jacobson, Kang and Myers. Requiring that the coefficient of such corrections be absolutely consistent with gravitational wave observational results validating the Hawking Area Theorem for binary black hole coalescences, implies constraints on parameters of F(R) gravity. For the sake of comparison, we present a computation of inverse area corrections for quantum black holes in quantum general relativity, using the It from Bit approach of Wheeler modified by some tenets of Loop Quantum Gravity.

gr-qc↗

arXiv2025

Complex Scalar Singlet Model: Electroweak Phase Transition and Gravitational Waves

The Standard Model (SM) cannot explain the observed baryon asymmetry of the Universe (BAU), thus driving the need for physics beyond the SM, which can generate electroweak baryogenesis through a strong first-order electroweak phase transition (SFOPT). We extend the SM with a complex singlet scalar (cxSM) and examine the phase transition behavior using a fully general renormalizable scalar potential that permits a complex vacuum expectation value for the singlet and coupled dynamics among multiple scalar fields. Employing the one-loop thermal effective potential with daisy resummation and appropriate counter terms, we conduct an extensive scan of the parameter space, enforcing both theoretical and experimental limits on the scalar sector. This analysis reveals viable domains yielding SFOPT. From these regions, we select representative benchmark scenarios demonstrating multi-stage transitions, producing stochastic gravitational wave signals via bubble nucleation dynamics. The resulting spectra lie within the projected sensitivity of next-generation observatories, including LISA, BBO, DECIGO, and U-DECIGO. Thus, the cxSM offers a compelling setting for electroweak baryogenesis, enriched by correlated gravitational-wave and collider phenomenology.

hep-ph↗