19 citations · 22 across the 4 of their papers we have counts for
4 papers
Heavy QCD Axions at High-Energy Muon Colliders
Ravneet Bedi, Tony Gherghetta, Soubhik Kumar +2
We study the physics potential of heavy QCD axions at high-energy muon colliders. Unlike typical axion-like particles, heavy QCD axions solve the strong CP problem with phenomenolo…
Towards a Complete Treatment of Scalar-induced Gravitational Waves with Early Matter Domination
Soubhik Kumar, Hanwen Tai, Lian-Tao Wang
Large curvature perturbations can source an observable amount of stochastic gravitational wave background (SGWB). We consider several scenarios where small-scale curvature perturba…
Probing Dark Matter Isocurvature with Primordial Non-Gaussianity
Michael Geller, Soubhik Kumar, Lian-Tao Wang
Multiple fields can become dynamical during the inflationary epoch. We consider an example where a light field acquires isocurvature fluctuations during inflation and contributes t…
An Effective Cosmological Collider
Nathaniel Craig, Soubhik Kumar, Amara McCune
Effective field theories (EFTs) of heavy particles coupled to the inflaton are rife with operator redundancies, frequently obscured by sensitivity to both boundary terms and field…