2004/10/28 by J. Lorenzo Díaz-Cruz, J. L. Diaz-Cruz, R. Noriega-Papaqui +1 · 1 citation
Physics and Astronomy · #Neutrino Physics Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.71.015014
published as Phys.Rev. D71 (2005) 015014 · 29 pages, 35 figures
arxiv created 2004/10/28 · openalex publication_date 2005/01/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the fermionic couplings of the neutral Higgs bosons in the two Higgs doublet model, assuming a four-texture structure for the Yukawa matrices. We then derive the low-energy constraints on the model, focusing in b-quark and lepton physics, and apply them to study Higgs boson detection at future colliders. We show that the bound on the flavor-violating parameter \ensuremathχsb obtained from the contribution due to the bsh0 coupling to the decay b\ensuremath→s+\ensuremathγ (roughly of the order 10^\ensuremath-1--10^\ensuremath-2) is approximately a factor 10 more restrictive than that obtained from the current bound on \ensuremathΓ(Bs0\ensuremath→\ensuremathμ^\ensuremath-\ensuremathμ+) (which gives a bound on \ensuremathχsb of the order 100--10^\ensuremath-1). On the other hand, the analysis of the LFV decay \ensuremathμ\ensuremath→e\ensuremathγ leads to the constraint \ensuremathχ_\ensuremathμ\ensuremathτ\ensuremath\lesssim10^\ensuremath-2. The observation of a Higgs signal at a future muon collider would confirm the results of these constraints for tan\ensuremathβ\ensuremath\lesssim15, while for larger values of tan\ensuremathβ such colliders will not improve the bounds derived from low-energy data. At a hadron collider it is further possible to study the Higgs boson coupling h0bb by searching for the associated production of the Higgs boson with bb pairs.