Extended scalar sectors can yield baryogenesis at the EW scale. This is generally related to their providing the needed departure from thermal equilibrium (absent in the SM) via a first-order EW phase transition. Yet, BSM sources of CP violation are …
It has been shown that supersymmetry breaking in a hidden sector at the PeV scale can lead to adistinctive strong first order phase transition, producing gravity waves that could be observed in upcoming experiments. We develop this idea, proposing a …
In this talk, I will first discuss the low mass mediator models with specific examples. These models contain new particles, e.g. light mediators, dark matter candidates, etc. I will discuss various ways of detecting these models in the …
Dark matter that accumulates in compact stars can have a number of observable effects, including thermal emission from the surface of neutron stars, converting neutron stars into black holes, and causing white dwarfs to explode. After reviewing these …
Ultralight dark matter is a compelling dark matter candidate. Being wavelike, it has interesting phenomenological implications in the early and late universe. Recent simulations have shown that ultralight dark matter exhibits an order-one density …
Hidden $U(1)$ symmetries are widely prevalent across numerous new physics models and have garnered significant attention. These symmetries give rise to intriguing testable phenomena, such as "dark photons" as the force mediators and "millicharged" …
Cosmological observables are particularly sensitive to the existence of ultralight dark photons. I will describe the physics of conversions between visible and dark photons, and discuss how to use both the cosmic microwave background and the …
To shed light on the difference between matter and antimatter in the Universe and search for physics beyond the Standard Model, the Deep Underground Neutrino Experiment (DUNE) will analyze the oscillations of neutrinos and antineutrinos with …
With theoretical constraints such as perturbative unitarity and vacuum stability conditions and updated experimental data of Higgs measurements and direct searches for exotic scalars at the LHC, we perform an updated scan of the allowed parameter …
It is plausible that the dark matter is a remnant of a hidden sector that involves new strongly coupled dynamics akin to Standard Model QCD. Such a dark sector could lead to a variety of signatures at the LHC, and its imprint could be lurking within …