The NA62 experiment at CERN, designed to measure the highly-suppressed decay $K^{+} \rightarrow \pi^{+}\nu\bar{\nu}$, has the capability to collect data in a beam-dump mode, where 400~GeV protons are dumped on an absorber. In this configuration, New Physics (NP) particles, including dark photons, dark scalars and axion-like particles, may be produced and reach a decay volume beginning 80~m...
Recent measurements in flavour changing charged current (FCCC) $b→c\bar l \nu_l$ transitions hint existence of new physics (NP) beyond the standard model (SM). The lepton flavour universality (LFU) ratios $R_{D^{(*)}}$ measured by BaBar, Belle and LHCb have shown around $3.3\sigma$ deviation between theory and experiment [1]. These anomalous results connected to the $b$ hadron decays indicate...
Radiative b-hadron decays are sensitive probes to new physics through the study of branching fractions, angular observables, CP violation parameters, and photon polarization. The LHCb experiment is ideally suited for the analysis of these decays due to the high luminosity of B production, its high trigger efficiency, as well as excellent tracking and particle identification performance. Recent...
We study the exclusive semileptonic $B_c\to D_s^{(*)} (\mu^+ \mu^-, \nu \bar{\nu})$ decay modes mediated by $b \to s$ quark level transitions in the Effective field theory formalism. There are discrepancies between the experimental measurements and the Standard Model predictions in various observables associated with the $B \to (K, K^*, \phi)\ell \ell$ processes. On the other hand, a very...
