2020/10/31 by J. Lorenzo Díaz-Cruz, J. L. Diaz-Cruz, U. J. Saldaña-Salazar +5 · 2 citations
Physics and Astronomy · #Ansatz #Black Holes and Theoretical Physics #Fermion #Higgs boson #Mathematical physics #Muon #Neutrino Physics Research #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quark #Scalar (mathematics) #Two-Higgs-doublet model #Vacuum expectation value #Yukawa potential #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.104.035018
published in Physical review. D/Physical review. D. 104(3) (American Physical Society) · 13 pages, 5 tables, 9 figures; new references added and major improvements; version accepted by Phys. Rev. D
arxiv created 2021/07/23 · openalex publication_date 2021/08/20 · arxiv updated 2021/08/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Motivated by the fermion mass hierarchy, we study the phenomenology of two flavorful two-Higgs-doublet model (2HDM) scenarios. By virtue of the flavor or singular alignment ansatz, it is possible to link the mass of a subset of fermions to the vacuum expectation value (VEV) of a unique Higgs doublet and to simultaneously avoid flavor-changing-neutral-currents at tree level. We explicitly construct two models called Type A and B. There, either the top quark alone or all third generation fermions couple to the doublet with the larger VEV. The other fermions acquire their masses through the small VEV of the other doublet. Thus, more natural values for the Yukawa couplings can be obtained. The main differences between these models and conventional ones are studied, including a discussion of both their structure and phenomenological consequences. In particular, as distinctive deviations for the Yukawa couplings of the light fermions are predicted, we discuss possible tests at the LHC based on searches for h\ensuremath→J/\mathrm\ensuremathΨ+\ensuremathγ, h\ensuremath→\ensuremathμ\ensuremathμ and heavy scalar resonances decaying to muon pairs. We find that for a wide region of parameter space, this specific set of signatures can be used to distinguish among the new proposed types and the conventional ones.