11 papers
Gravitational Waves from Feebly Interacting Particles in a First Order Phase Transition
Ryusuke Jinno, Bibhushan Shakya, Jorinde van de Vis
First order phase transitions are well-motivated and extensively studied sources of gravitational waves (GWs) from the early Universe. The vacuum energy released during such transi…
A Cosmic Higgs Collider
Bibhushan Shakya
This paper examines frameworks and phenomenology of ultrarelativistic Higgs vacuum bubble collisions in a first-order phase transition associated with the Standard Model Higgs fiel…
Bubble Friction in Symmetry-Restoring Transitions
Andrew J. Long, Bibhushan Shakya, Julia Anabell Ziegler
In standard (symmetry-breaking) first-order phase transitions, the frictional pressure on expanding bubble walls can be dominated by transition radiation -- the emission of a gauge…
Did our Universe Tunnel out of the Wrong Higgs Vacuum?
Bibhushan Shakya
This paper explores various aspects and implications of the initial configuration of the Standard Model (SM) Higgs field at the beginning of our Universe. It is well known that the…
Gravitational Waves from Particles Produced from Bubble Collisions in First-Order Phase Transitions
Keisuke Inomata, Marc Kamionkowski, Kentaro Kasai +1
We discuss a new source of gravitational waves (GWs) from first-order phase transitions. The collisions of bubbles of the new phase can efficiently produce particles that couple to…
On Particle Production from Phase Transition Bubbles
Henda Mansour, Bibhushan Shakya
While first order phase transitions (FOPTs) have been extensively studied as promising cosmological sources of gravitational waves, the phenomenon of particle production from the d…