I will present a summary of recent experimental results in flavour physics, with a focus on those most sensitive to possible effects of physics beyond the Standard Model.
In this talk, I will review the status of the various possible
new physics explanations of the B-meson charged current anomalies namely,
R_D and R_D*. Model-independent correlations/constraints with/from other
observables will be discussed. I will also make some general comments about
the composite Leptoquark explanations.
Leptonic rare decays of neutral $B$ mesons belong to the most favourable processes for testing the flavour structure of the Standard Model, with an outstanding sensitivity to possible new (pseudo)-scalar contributions. We discuss implications of the current data, discuss the use of new observables to probe New Physics, and make a comparison with leptonic decays of charged $B$ mesons.
In this talk I discuss the calculation of b->sll' and l'->l'gamma transitions in 2HDMs (including right-handed neutrinos) and its phenomenological implications.
In this talk I will show how one can account for the observed anomalies in $b\to s\mu^+\mu^-$ via loop effects with new scalars and fermions. Allowing for couplings to left- and right-handed quarks and leptons, we calculate the contributions to $b\to s\mu^+\mu^-$, $B-\bar{B}$ mixing and the anomalous magnetic moment of the muon.
I will show how, in a specific model in which we supplement the...
In this talk we discuss the present situation of global fits after the new measurement of RK. We make special emphasis on what we learn concerning disentangling scenarios and what should be the next step. Also the importance that Lepton Flavour Universal New Physics can have in the near future is discussed.
I review rare kaon decays in the LHC era: we discuss interplay with
B-anomalies and possible New Physics in direct CP violation in K → 2
pi : very rare kaon decays like K → pi nu nu are very important to
this purpose We discuss also the decays K0 → mu mu due to the LHCB
measurement
I will review the present status of the CP-violating ratio $\epsilon'/epsilon$ within the SM using first dual Dual QCD (DQCD) framework and confronting it both with Lattice QCD and Chiral Perturbation Theory. DQCD is presently the only framework which allowed to calculate
all $K\to\pi\pi$ hadronic matrix elements of BSM operators which opened the road for the general study of...
The extraction of the CKM matrix from flavour observables can be affected by physics beyond the Standard Model. I will present a general roadmap to take this into account, applied to the SMEFT. This approach allows one to perform general SMEFT analyses in a consistent fashion, independently of any assumptions about the way new physics affects the flavour observables that are used to fix the...
The talk consist of two parts. In the first part I present a new method for the extraction of $V_{cb}$ which is based on a reduced set of non-perturbative parameters. This will eventually allow us to extract this CKM element up to order $1/m^4$ without relying on model for non-perturbative physics. in the second part I present the calculation of the QCD corrections to the $1/m^3$ contributions...
We construct angular observables in the decay of B meson to a pseudoscalar (vector) $D^{(\ast)}$ meson. We combine these observable in order to build tests of lepton flavor universality violation,
complementary to the ratios $R(D^{(\ast)})$. We then make the predictions for these observables within the standard model and new physics scenarios.
I consider the flavour physics of the most general b->c cbar s effective hamiltonian at dimension six, comprising 20 independent contact interactions. These interactions can give sizable contributions to radiative B decay, rare semileptonic B decays (P5’, right-handed currents, etc) and B-meson lifetime observables. I will present bounds on the relevant contact interactions, which generally...
Data on $B \rightarrow D \tau \nu$ and $B \rightarrow D^* \tau \nu$ deviate from their Standard-Model expectations. I discuss how precise measurements of polarisation observables can discriminate between different new-physics interpretations. The branching fraction of $\Lambda_b \rightarrow \Lambda_c \tau \nu$ will instead serve as a model-independent cross-check of previous measurements,...
The LHCb experiment has made several measurements in b->s transitions which indicate tensions with the Standard Model predictions. Assuming the source of these tensions to be new physics, we present new global fits to all Wilson coefficients which can effectively receive beyond the Standard Model contributions, including also the latest results from Moriond 2019. We also discuss the role of...
A thorough investigation of the vector leptoquark (LQ) hypothesis for a combined explanation of the B-physics anomalies is presented. This hypothesis is discussed both using an Effective Field Theory approach and in the context of a complete ultraviolet completion of the Standard Model (SM) based on the hypothesis of flavour non-universal gauge interactions (which could provide an explanation...
In this talk I would like to present a work, close to conclusion, done in collaboration with V. Gherardi, M. Nardecchia, and A. Romanino. We derive general correlations of bsμμ anomalies with other flavour and high-pT observables, under the assumption that the flavour matrix of the relevant operators is of rank-one. This condition is automatically realised in a large class of UV models,...
We present the result of the updated study of the viability of the models in which the Standard Model is extended by a single leptoquark state at a TeV scale. We show that one cannot construct a model with one such scalar leptoquark state and be compatible with many constraints arising from the low energy flavor physics data, as well as from the direct LHC searches. Instead, one can combine...
Light pseudoscalars are predicted in several scenarios of physics beyond the SM. In this talk I will discuss how these particles, also known as axion-like particles (ALPs), can be probed in flavor-physics experiments. Particular emphasis will be given to ALP production at B-factories and to their contributions to FCNC mesons decays.
I discuss strong decays of excited charmed and beauty mesons into a light meson, exploiting the effective field theory based on heavy quark symmetries for heavy mesons, chiral symmetry for light pseudoscalars and on the hidden gauge symmetry to incorporate light vector mesons. The approach has already been successfully employed to classify several heavy-light mesons.
After a brief review of...
The fully differential $\bar B \to D^* ( D \pi, D \gamma) \ell^-{\bar \nu}_\ell$ angular distributions are considered to scrutinize the effects of the $B \to D^{(*)}$ form factor parametrizations.
The use of the angular coefficients to pin down deviations from SM is discussed, in particular concerning lepton flavour universality violation phenomena.
A possible connection between the...
We propose a viable minimal model with spontaneous CP violation in the framework of a Two Higgs Doublet Model. The model is based on a generalised Branco-Grimus-Lavoura model with a flavoured $\mathbb{Z}_2$ symmetry, under which two of the quark families are even and the third one is odd. The lagrangian respects CP invariance, but the vacuum has a CP violating phase, which is able to generate...
One of the conditions for creating a matter-dominated Universe is presence of interactions that differentiate between matter and anti-matter. Properties of such interactions can be probed at particle accelerators by studying decay patters of produced particles. On March 21, one of the CERN's experiments, the LHCb, announced observation of CP-violation in the decays of particles containing...
