Muon g−2 and Type-X Two-Higgs-Doublet Model: High-Scale Validity Studies

Explore a comprehensive study on the high-scale validity of a type-X two Higgs doublet scenario explaining the observed muon (g−2) value. Delve into the analysis of admissible parameter space regions, considering recent muon (g−2) data, theoretical constraints like low-scale perturbativity and vacuum stability, and experimental constraints including LHC results. Examine the scenario's allowance for a pseudoscalar physical state below the 125-GeV scalar mass and a second neutral scalar particle both above and below 125 GeV. Learn about the use of two-loop renormalization group equations to predict coupling values at high scales and identify regions in low-scale parameter space maintaining perturbative unitarity and vacuum stability up to various scales. Discover how this scenario, while explaining muon (g−2), can potentially remain valid from 10^4 GeV up to the Planck scale, opening new avenues for exploring its ultraviolet completion.