Flavor Violation in the Scalar Sector

Abstract

In many extensions of the Standard Model, the alignment in flavor space of the fermion mass matrices and the Yukawa coupling matrices can be broken. The physical scalar boson $h(125)$ could then have flavor changing couplings. In this talk, we summarize constraints on such couplings from rare decay searches, and we investigate current and future detection prospects at the LHC. We emphasize the importance of several yet unexplored final states: (i) anomalous single top + $h$ production in $pp\to th$, arising from $tuh$ couplings (but not from the more widely studied $tch$ couplings); (ii) $pp\to t+(H^0\to hh)$ through $tuh$ couplings in the context of a Two Higgs Doublet Model (2HDM), perhaps the simplest model with flavor violation in the scalar sector; (iii) $pp\to H^0\to \tau \mu$ in the 2HDM context. For all of these processes, we perform a detailed phenomenological studies. Finally, we comment on the possibility of flavor violation combined with CP violation, which may be interesting if the current CMS hint for $h\to \tau \mu$ gets corroborated.

7 pages, 5 figures, contribution to the Proceedings of the 51st Rencontres de Moriond, Electroweak Session, March 12-19, 2016 in La Thuile, Italy; mainly based on work done in collaboration with Malte Buschmann, Admir Greljo, Roni Harnik, Jernej Kamenik, Jia Liu, Marco Nardecchia, Xiao-Ping Wang, and Jure Zupan, see arXiv:1209.1397, arXiv:1404.1278, arXiv:1406.5303, arXiv:1601.02616

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Cited by in corpus (1)

• Physics of leptoquarks in precision experiments and at particle colliders