Constraining wrong-sign $hbb$ couplings with $h\to {\rm Y}\gamma$

Tanmoy Modak, Jorge C. Romão, Soumya Sadhukhan +2

The rare decay $h\to {\rm Y}\gamma$ has a very small rate in the Standard Model, due to a strong cancellation between the direct and indirect diagrams. Models with a changed $hbb$ co…