Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

LFU and CP violation

Jul 9, 2022, 2:47 PM
Room 9 (Indaco)

Room 9 (Indaco)

Parallel Talk Quark and Lepton Flavour Physics Quark and Lepton Flavour Physics


Aleks Smolkovic (University of Bern)


The persistent hints of LFU violation in $b \to s \ell \ell$ may imply an existence of leptoquarks close to the TeV scale that couple to $b\mu$ and $s\mu$. These leptoquark Yukawa couplings can in full generality be complex and thus provide a new source of CP violation. We show that a large CP phase with a definite sign is perfectly viable for an $S_3$ leptoquark of mass below a few TeV, consistent with CP even and CP odd $b \to s \ell \ell$ and $B_s$ mixing observables. Furthermore, we show how the direct CP asymmetries in $B\to K \mu \mu$ are significantly enhanced in the vicinity of narrow charmonia, and that their measurement in the future could provide important additional information in constraining the potentially CP violating NP in $b \to s \ell \ell$. Possibilities for constraining such CP phases at the LHC and future colliders will also be presented.

In-person participation Yes

Primary author

Aleks Smolkovic (University of Bern)

Presentation materials