2016/05/31 by Eung Jin Chun, Jinsu Kim
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Degenerate energy levels #Electron #Hadron #Higgs boson #Lepton #Muon #Nuclear physics #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Sigma #Statistics #Universality (dynamical systems) #hep-ph
paper · pdf · doi:10.1007/jhep07(2016)110
11 pages; v2: 14 pages, 1 figure, version to be published in JHEP
openalex publication_date 2016/07/01 · arxiv created 2016/07/29 · arxiv updated 2016/08/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The type X (lepton-specific) two-Higgs-doublet model at large tan β becomes leptophilic and thus allows a light pseudoscalar A accommodating the observed muon g − 2 deviation without conflicting with various hadronic constraints. On the other hand, it is strongly constrained by leptonic precision observables such as lepton universality test in the neutral and charged currents. Treating all the lepton universality data in a consistent way, we show how the current data constrain the parameter space of m A and tan β for given degenerate masses of heavy Higgs bosons H and H ±. While no overlapping region is found at 1σ, a sizeable region is still viable at 2σ for H/H ± masses at around 200 ∼ 400 GeV.