6 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…
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…
Imprint of matter-antimatter asymmetry on collapsing domain walls
Dipendu Bhandari, Debasish Borah, Indrajit Saha
Spontaneous breaking of discrete symmetries play non-trivial role in many well-motivated particle physics models. However, it leads to a network of cosmologically unwanted domain w…
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…
Impact of First-order Electroweak Phase Transition on QCD Axion
Dipendu Bhandari, Soumen Kumar Manna, Arunansu Sil
The QCD axion addresses the strong CP problem and dark matter via the misalignment mechanism, typically requiring a decay constant GeV), unless the in…
Leptogenesis from a Phase Transition in a Dynamical Vacuum
Dipendu Bhandari, Arghyajit Datta, Arunansu Sil
We show that a phase transition may take place in the early Universe at a temperature via a Standard Model singlet scalar field which happens to couple to right handed neutri…