Searching for t->c(u)h with dipole moments

Abstract

A discovery of flavour-changing Higgs-boson decays would constitute an undeniable signal of new physics. We derive model-independent constraints on the tch and tuh couplings that arise from the bounds on hadronic electric dipole moments. Comparisons of the present and future sensitivities with both the direct LHC constraints and the indirect limits from D-meson physics are also presented.

Comments: 18 pages, 2 figures; v2: references added and typos corrected; coincides with version to be published in JHEP