Rare decay modes of the newly discovered standard-model-like Higgs boson $h$ may test the flavor-changing couplings in the leptoquark sector through the process $h\to {\tau }^{\mp }{\mu }^{\pm }$. Motivated by the recently reported excess in LHC data from the CMS detector, we found that a predicted branching fraction Br($h\to {\tau }^{\mp }{\mu }^{\pm }$) at the level of 1% is possible even though the coupling parameters are subjected to the stringent constraint from the null observation of $\tau \to \mu \gamma$, where the destructive cancellation among amplitudes is achievable by fine-tuning.

• Received 6 October 2015

DOI:https://doi.org/10.1103/PhysRevD.93.015010