Conveners
Flavor III
- Da Liu (ITP, CAS/EPFL)
Description
https://pitt.zoom.us/j/97533519613
The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with branching ratios as low as 10-11. Searches for lepton flavour and lepton number violating decays of the charged kaon into final states containing a lepton pair based on this data set are presented.
Flavourful Feebly-Interacting Particles (FIPs) in the MeV to GeV range have a strong impact on precision frontier observables ranging from rare meson decays to the lepton anomalous magnetic moments. We use an effective field theory approach “SM+X” along with the HEPfit package to study the effect of FIPs on B to K observables. We present an updated study of the available parameter space and...
A Left-Right Symmetric Model which utilizes vector-like fermions to generate quark and lepton masses via universal see-saw mechanism is studied. In this talk, I will present the results of our analysis on the new contributions to flavor observables from this model. Further, I will discuss the possibilities of explaining the neutral current B-anomalies as well as the Cabibbo anomaly in this model.
Scenarios in which right-handed light Standard Model fermions couple to a new gauge group, $U(1)_{T3R}$ can naturally generate a sub-GeV dark matter candidate. But such models necessarily have large couplings to the Standard Model, generally yielding tight experimental constraints. We show that the contributions to $g_\mu-2$ from the dark photon and dark Higgs largely cancel out in the narrow...
$b\to s\tau\tau$ and $b\to c\tau \nu$ measurements are highly motivated for addressing lepton-flavor-universality-violating (LFUV) puzzles, such as $R_{D^{(*)}}$, $R_{J/\psi}$ and $R_{K^{(\ast)}}$ anomalies, raised by the data of LHCb, BELLE and BarBar. The planned operation of future $e^-e^+$ colliders as a $Z$ factory provides a great opportunity to conduct such measurements, because of its...
