The hierarchy between the mass of the Higgs boson and larger mass scales becomes ever
more puzzling as experiments push to higher energies. Neutral naturalness is the umbrella …

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 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 …

This is the third out of five chapters of the final report [1] of the Workshop on Physics at HL-
LHC, and perspectives on HE-LHC [2]. It is devoted to the study of the potential, in the …

A bstract Motivated by theories of Neutral Naturalness, we argue that Mirror Stars are a
generic possibility in any hidden sector with analogues of Standard Model (SM) …

A bstract We introduce the Hyperbolic Higgs, a novel solution to the little hierarchy problem
that features Standard Model neutral scalar top partners. At one-loop order, the protection …

A bstract We explore the possibility of discovering the mirror baryons and electrons of the
Mirror Twin Higgs model in direct detection experiments, in a scenario in which these …

A bstract Many minimal models of dark matter (DM) or canonical solutions to the hierarchy
problem are either excluded or severely constrained by LHC and direct detection null …

A bstract The twin Higgs mechanism is a solution to the little hierarchy problem in which the
top partner is neutral under the Standard Model (SM) gauge group. The simplest mirror twin …