Measuring the fermionic couplings of the Higgs boson at future colliders as a probe of a nonminimal flavor structure

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.015014· OSTI ID:20705754

Diaz-Cruz, J L ^[1]; Noriega-Papaqui, R ^[2]; Rosado, A ^[1]

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1. Cuerpo Academico de Particulas, Campos y Relatividad de la Benemerita Universidad Autonoma de Puebla, Apartado Postal 1364, C.P. 72000 Puebla, Puebla (Mexico)
2. Instituto de Fisica, Benemerita Universidad Autonoma de Puebla, Apartado Postal J-48, C.P. 72570 Puebla, Puebla (Mexico)

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 {chi}{sub sb} obtained from the contribution due to the bsh{sup 0} coupling to the decay b{yields}s+{gamma} (roughly of the order 10{sup -1}-10{sup -2}) is approximately a factor 10 more restrictive than that obtained from the current bound on {gamma}(B{sub s}{sup 0}{yields}{mu}{sup -}{mu}{sup +}) (which gives a bound on {chi}{sub sb} of the order 10{sup 0}-10{sup -1}). On the other hand, the analysis of the LFV decay {mu}{yields}e{gamma} leads to the constraint {chi}{sub {mu}}{sub {tau}} < or approx. 10{sup -2}. The observation of a Higgs signal at a future muon collider would confirm the results of these constraints for tan{beta} < or approx. 15, while for larger values of tan{beta} 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 h{sup 0}bb by searching for the associated production of the Higgs boson with bb pairs.

• OSTI ID: 20705754
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
B QUARKS
B S MESONS
COUPLING
FLAVOR MODEL
HIGGS BOSONS
HIGGS MODEL
INTERMEDIATE BOSONS
LEPTONIC DECAY
MATRICES
MUONS MINUS
MUONS PLUS
NEUTRAL CURRENTS
TEXTURE