The purely leptonic FCNC decays $B_{s,d} \to \ell^+ \ell^-$ are powerful probes of the CKM picture of the SM and due to helicity suppression are very sensitive to NP contributions. The hadronic uncertainties are under exceptionally good control due to lattice calculations, allowing theoretical control at the percent level thereby neglecting currently QED corrections. This gap can be closed for...
An NLO computation of the $B_{u,d,s}\to \gamma$ form factor in light-cone sum rules will be presented. I will compare aspects of the computation to more familiar $B_s\to \phi $ form factor computations and give a physical interpretation of the photon distribution amplitude. I will discuss the extraction of the inverse moment of the $B$-meson distribution amplitude but most likely not present a...
We present a formalism to extend the well-know Minimal Flavour Violation approach for physics beyond the Standard Model. As a guideline for the flavour pattern we adopt a Froggatt-Nielsen inspired power counting. We study the phenomenological implications when taking into account the spurions associated with a $U_1$ vector leptoquark and their compatibility with flavour data and the anomalies...
The recent hints of deviations from the SM in low-energy flavour-changing processes have shaken many prejudices about physics beyond the SM, opening new directions in model building. In this talk I will highlight some of these new directions, emphasising the key role of flavour physics, both at low and at high energies.
The decays of $b$-hadrons offer a unique laboratory to test SM predictions and potentially reveal hints of new physics.
Results and prospects in Flavour from ATLAS and CMS are presented, showing the role and the capability of the general purpose LHC experiments in the low $p_T$ investigation and the bridge to the high $p_T$ searches in view of a coherent physics picture of possible beyond...
I plan to discuss the interplay between Higgs phenomena in high-$p_T$ measurements and low-energy searches. Topics that may be covered are determinations of light-quark Yukawa couplings, bounds on CP-violating or flavour-violating Higgs couplings from searches for electric dipole moments, and more if time permits.
Precision measurements of CP violating observables in the decays of $b$ and $c$ hadrons are powerful probes to search for physics beyond the Standard Model. The most recent results on CP violation in the decay, mixing and interference of both $b$ and $c$ hadrons obtained by the LHCb Collaboration with Run I and part of Run II data are presented, including the first observation of CP violation...
We review recent progress in increasing the precision of SM flavour observables, like heavy hadron lifetimes or $B$-mixing. The latter observable turns out to be a severe constraint on BSM models that try to explain the recently observed anomalies in the flavour sector.
Long-distance charm effects in $b\to s\ell\ell$ decays are the main obstacle in the interpretation of measurements of the $B\to K^*\mu\mu$ angular distribution. Given the theoretical difficulty of predicting such a contribution, the natural avenue for progress is to use data to disentangle it from New Physics. In this talk, I will present the latest measurements and plans for unbinned analyses...
Theory predictions for exclusive $b\to sll$ amplitudes require the evaluation of local and non-local form factors. I will discuss the calculation of local form factors beyond the narrow-width limit, as well as the perturbative and non-perturbative aspects of the non-local form factors, which include the charm-loop effect.
Flavour Changing Neutral Currents (FCNC) are an excellent probe for the search of New Physics. Therefore, LHCb has put a particular care in the study of $B$ decays mediated by FCNC. Tensions between present data and Standard Model predictions have been found in some of these channels, hinting at a possible violation of Lepton Flavour Universality. I will review the status of these tensions...
I will first discuss a possible parametrisation of the contribution of two-particle intermediate $\bar c c$ states (open charm threshold) to the $B^+ \to K^+ \mu^+ \mu^-$ differential decay rate. Motivated by $B$ anomalies, whose combined explanation calls for large New Physics in the $b \to s \tau^{+} \tau^{-}$ transition, I will then comment on the possibility of extracting a bound on this...
Lattice QCD provides the most precise non-perturbative inputs needed for the theoretical predictions of many observables relevant for the current quark flavor physics program. Recent results for those lattice inputs related to $B$-meson flavor observables will be summarized, and future prospects for the improvement of key quantities will be discussed.
An approach is presented for the calculation of hadron-lepton and hadron-hadron interactions at large momentum transfer in the presence of Lorentz-violating background fields affecting quarks. Cross sections for deep inelastic scattering and the Drell-Yan process are calculated at leading order for minimal and nonminimal Lorentz violation using the Standard-Model Extension, an effective field...
I will review the status of the kaon physics programme of the RBC-UKQCD collaborations as well as prospects for its future. The talk will focus on CP-violation in $K\to\pi\pi$ decays and the evaluation of $\varepsilon'/\varepsilon$, the computation of the $K_L-K_S$ mass difference and the study of rare kaon decays.
The NA62 Experiment, installed in the CERN North Area, studies the physics of the $K^+$ meson.
Its main purpose is to measure the branching ratio of the ultra-rare decay $K^+\rightarrow\pi^+\nu\bar\nu$ with a $10\%$ precision, in order to strictly test the Standard Model, that gives for that physics quantity a very precise prediction: $BR(K^+\rightarrow\pi^+\nu\bar\nu) = (0.84 \pm 0.10)...
The quantity $\varepsilon^\prime/\epsilon$ measures direct CP violation in Kaon decays. SM predictions show a 2.9$\sigma$ tension with data, with the theoretical uncertainty dominating. As rapid progress on the lattice is bringing nonperturbative long-distance effects under control, a more precise knowledge of short-distance contributions is needed. We describe the first NNLO results for...
In this contribution, I'm going to provide an overview of current/future kaon physics in light of searching for physics beyond the standard model. The main topics are (1) two $CP$ violations in $K\to \pi \pi$ ($\varepsilon_K$ and $\varepsilon^{\prime}/\varepsilon$) and their new physics implications, (2) $CP$ violation in $K \to \bar{\mu} \mu$ and its new physics sensitivity, and (3) $K \to...
The recent release of improved lattice data has revived again the interest on precise theoretical predictions for the direct CP-violation ratio $\varepsilon'/\varepsilon$. We present a complete update of the Standard Model prediction, including a new re-analysis of isospin-breaking corrections which are of vital importance in the theoretical determination of this observable. Contrary to recent...
