Abstract: I will discuss the fact that for a generic class of observables in hadronic collisions, well above the weak scale, the standard parton model picture is violated due to non-factorizable electro-weak corrections at leading order in the power expansion. The mechanism for factorization violation we point out here is distinct from the canonical QCD factorization violation mechanism as it … Read More
Abstract: Gravitational waves provide a window into the early Universe and a direct probe of the epoch between inflation/reheating and Big Bang nucleosynthesis (BBN), which is otherwise difficult to access. In this talk, I will discuss recent progress towards detecting the cosmological signatures of physics beyond the Standard Model (BSM) at the future space-based interferometer LISA, focusing in particular on … Read More
The recent discovery of gravitational waves from five binary black hole (BBH) mergers has given us a new way to study our universe. The origin of the black hole (BH) binaries remains unclear. In this talk, I discuss how the BH spin distribution may help us distinguish between primordial or stellar origins. Primordial black holes (PBHs) may have formed due … Read More
Abstract: We study interactions of cosmological relics, X, of mass m and electric charge qe in the galaxy, including thermalization with the interstellar medium, diffusion through inhomogeneous magnetic fields and Fermi acceleration by supernova shock waves. We find that for m < 10^10 q GeV, there is a large flux of accelerated X in the disk today, with a momentum … Read More
Abstract: Swampland conjectures are proposed criteria to determine if a seemingly consistent low energy effective field theory can be UV-completed into a consistent theory of quantum gravity. In this talk I will give a brief overview of some of these conjectures, and then discuss their phenomenological implications for current accelerating expansion of the universe.
As the LHC transitions to its luminosity driven phase, its sensitivity to high energy signals from beyond the standard model will increase much more slowly than in the past. For soft signatures on the other hand, large, qualitative improvements can be made both with the existing detectors, as well as with future upgrades. I will discuss a few examples related … Read More
Signals of lepton flavor universality violation are currently observed in semi-tauonic B decays at approximately the 4 sigma level compared to theoretically clean Standard Model (SM) predictions. I’ll discuss the possibility that the semi-tauonic decay involves a sterile, right-handed neutrino, rather than a left-handed SM one, permitting simpler UV complete explanations with relaxed constraints. I’ll survey the space of possible … Read More
Abstract: We present spherically symmetric solutions to Einsteinâs equations, which are equivalent to canonical Schwarzschild and Reissner-Nordstrom black holes on the exterior, but with singular (Planck-density) shells at their respective event and inner horizons. The locally measured mass of the shell and the singularity are much larger than the asymptotic Arnowitt-Deser-Misner mass. The area of the shell is equal to … Read More