Effective Lagrangian approach to Higgs-mediated flavor changing neutral current top quark decays
- Instituto de Fisica, Benemerita Universidad Autonoma de Puebla, Apartado Postal J-48, 72570 Puebla, Pue. (Mexico)
The flavor changing neutral current (FCNC) transitions t{yields}q{sup '}H and t{yields}q{sup '}V{sub i} (V{sub i}={gamma},g,Z) are studied in the context of the effective Lagrangian approach. We focus on the scenario in which these decays are predominantly induced by new physics effects arising from the Yukawa sector extended with dimension-six SU{sub L}(2)xU{sub Y}(1)-invariant operators, which generate the most general CP-even and CP-odd tq{sup '}H vertex at the tree level. For the unknown coefficients, we assume a slightly modified version of the Cheng-Sher ansatz. We found that the branching ratio for the Higgs-mediated FCNC t{yields}q{sup '}V{sub i} decays are enhanced by two or 3 orders of magnitude with respect to the results expected in models with extended Higgs sectors, such as the general two-Higgs doublet model. We discuss the possibilities of detecting this class of decays at the large hadron collider (LHC)
- OSTI ID:
- 20705327
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 7; Other Information: DOI: 10.1103/PhysRevD.70.074003; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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