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arXiv · 1212.3307

Flavour with a Light Dynamical "Higgs Particle"

R. Alonso·M. B. Gavela·L. Merlo·S. Rigolin·J. Yepes
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Abstract

The Higgs-fermion couplings are sensitive probes of possible new physics behind a stable light Higgs particle. It is then essential to identify the flavour pattern of those interactions. We consider the case in which a strong dynamics lies behind a light Higgs, and explore the implications within the Minimal Flavour Violation ansatz. The dominant effects on flavour-changing Higgs-fermion couplings stem in this context from operators with mass dimension <6, and we analyze all relevant chiral operators up to that order, including loop-corrections induced by 4-dimensional ones. Bounds on the operator coefficients are derived from a plethora of low-energy flavour transitions, providing a guideline on which flavour-changing Higgs interactions may be open to experimental scrutiny. In particular, the coefficient of a genuinely CP-odd operator is only softly constrained and therefore its impact is potentially interesting.

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R. Alonso, M. B. Gavela, L. Merlo, S. Rigolin, J. Yepes. 2013-09-19. Flavour with a Light Dynamical "Higgs Particle". https://doi.org/10.1103/physrevd.87.055019

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