449 citations · 2.9k across the 64 of their papers we have counts for
10 papers · 1 filter
Improved cosmological constraints on the neutrino mass and lifetime
Guillermo F. Abellán, Zackaria Chacko, Abhish Dev +3
We present cosmological constraints on the sum of neutrino masses as a function of the neutrino lifetime, in a framework in which neutrinos decay into dark radiation after becoming…
Mirror Twin Higgs Cosmology: Constraints and a Possible Resolution to the and Tensions
Saurabh Bansal, Jeong Han Kim, Christopher Kolda +2
The mirror twin Higgs model (MTH) is a solution to the Higgs hierarchy problem that provides well-predicted cosmological signatures with only three extra parameters: the temperatur…
Cosmologically Degenerate Fermions
Marcela Carena, Nina M. Coyle, Ying-Ying Li +2
Dark matter (DM) with a mass below a few keV must have a phase space distribution that differs substantially from the Standard Model particle thermal phase space: otherwise, it wil…
Cosmological Particle Production and Pairwise Hotspots on the CMB
Jeong Han Kim, Soubhik Kumar, Adam Martin +1
Heavy particles with masses much bigger than the inflationary Hubble scale , can get non-adiabatically pair produced during inflation through their couplings to the inflaton.…
Free-streaming and Coupled Dark Radiation Isocurvature Perturbations: Constraints and Application to the Hubble Tension
Subhajit Ghosh, Soubhik Kumar, Yuhsin Tsai
Dark radiation (DR) appears as a new physics candidate in various scenarios beyond the Standard Model. While it is often assumed that perturbations in DR are adiabatic, they can ea…
Unleashing the full power of LHCb to probe Stealth New Physics
Martino Borsato, Xabier Cid Vidal, Yuhsin Tsai +38
In this paper, we describe the potential of the LHCb experiment to detect Stealth physics. This refers to dynamics beyond the Standard Model that would elude searches that focus on…