Flavour with a Light Dynamical "Higgs Particle"
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.
Cite
@article{arxiv.1212.3307,
title = {Flavour with a Light Dynamical "Higgs Particle"},
author = {R. Alonso and M. B. Gavela and L. Merlo and S. Rigolin and J. Yepes},
journal= {arXiv preprint arXiv:1212.3307},
year = {2013}
}
Comments
30 pages, 3 figures. V3: results and plots updated using more recent experimental inputs; typos corrected. Published in PRD