Speaker
Description
We show that the Aligned 2-Higgs Doublet Model (A2HDM) is a framework able to
simultaneously accommodate strong first-order electroweak phase transitions, in turn generating
detectable Gravitational Waves, as well as a variety of Standard Model-like Higgs boson signals
accessible at the Large Hadron Collider (LHC). We map the corresponding expanse of parameter space where such a phenomenology is realised in terms of the relative values of the masses of the
discovered Higgs boson and additional Higgs states of this model: two neutral ones (a CP-even and
a CP-odd one) plus a pair of charged ones. We find that both the Laser Interferometer Space Antenna
experiment, and the High-Luminosity LHC can test such a scenario within their lifetime. This study
Thus, it sets the stage for a two-prong complementary approach able to scrutinise the extended Higgs
sector of the A2HDM in both its high and low temperature manifestations.