We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a
comprehensive survey of standard model (SM) extensions. LLPs are a common prediction of …

Despite the fact that dark matter constitutes one of the cornerstones of the standard
cosmological paradigm, its existence has so far only been inferred from astronomical …

Abstract Several Pulsar Timing Array (PTA) Collaborations have recently provided strong
evidence for a nHz Stochastic Gravitational-Wave Background (SGWB). Here we investigate …

We find that a uniform scaling of the gravitational free-fall rates and photon-electron
scattering rate leaves most dimensionless cosmological observables nearly invariant. This …

A bstract We explore a simple solution to the cosmological challenges of the original Mirror
Twin Higgs (MTH) model that leads to interesting implications for experiment. We consider …

The fundamental nature of dark matter is entirely unknown. A compelling candidate is twin
Higgs mirror matter, invisible hidden-sector cousins of the Standard Model particles and …

The mirror twin Higgs (MTH) addresses the little hierarchy problem by relating every
Standard Model (SM) particle to a twin copy, but is in tension with cosmological bounds on …

A bstract We explore the cosmological signatures associated with the twin baryons,
electrons, photons and neutrinos in the Mirror Twin Higgs framework. We consider a …

A bstract We investigate the cosmology of the minimal model of neutral naturalness, the
mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin …

A bstract 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 …