8 papers
First Order Phase Transition Induced Graviton Bremsstrahlung: A Multi Peak Gravitational Wave Signature
Dipendu Bhandari, Rajat Kumar Mandal, Arunansu Sil
Gravitational waves (GWs) from first order phase transitions (FOPTs) are conventionally sourced by bubble collisions, sound waves, and plasma turbulence. We propose a novel microsc…
Probing ALP-portal fermionic dark matter at the colliders
Subhaditya Bhattacharya, Sahabub Jahedi, Soumen Kumar Manna +1
Axion-like particles (ALPs) are promising candidates for mediating interactions between a dark sector and the Standard Model (SM). In this work, considering the effective interacti…
Exploring Leptogenesis in the Era of First Order Electroweak Phase Transition
Dipendu Bhandari, Arunansu Sil
We present a novel approach for implementing baryogenesis via leptogenesis at low scale within neutrino seesaw framework where a sufficient lepton asymmetry can be generated via ou…
Probing Right Handed Neutrino assisted Reheating with Gravitational Waves and Leptogenesis
Arghyajit Datta, Shaaban Khalil, Rajat Kumar Mandal +1
We investigate a non-instantaneous reheating period in the early Universe, where the inflaton field decays exclusively to right-handed neutrinos (RHNs). The subsequent decay of the…
Reconciling ALP Dark Matter and Electroweak Baryogenesis through First-Order Electroweak Phase Transition
Dipendu Bhandari, Soumen Kumar Manna, Arunansu Sil
We show that an axionlike particle (ALP) can simultaneously generate the baryon asymmetry and constitute dark matter through dynamics triggered by a first-order electroweak phase t…
Exploring Leptogenesis, WIMP Dark Matter, and Gravitational Waves in an extended Scalar Framework
Subhaditya Bhattacharya, Niloy Mondal, Arunansu Sil
We explore extensions of type I seesaw framework with a scalar mediator () connecting to a complex scalar dark field (), and right handed neutrinos (), with an aim to c…