CP violation in $h\to ττ$ and LFV $h\to μτ$

The CMS collaboration has reported a possible lepton flavour violating (LFV) signal $h\toμτ$. Whereas this does not happen in the standard model (SM), we point out that new physics responsible for this type of decay would, in general, also produce charge-parity (CP) violation in $h\to ττ$. We estimate the size of this effect in a model independent manner and find that a large asymmetry, of order 25\%, is allowed by current constraints.

No reviews yet.

No comments yet.