Ayan Paul

B → K∗ ℓ + ℓ − decays at large recoil in the Standard Model: a theoretical reappraisal

A bstractWe critically reassess the theoretical uncertainties in the Standard Model calculation of the B → K∗ℓ+ℓ− observables, focusing on the low q2 region. We point out that even optimized observables are affected by sizable uncertainties, since hadronic contributions generated by current-current operators with charm are difficult to estimate, especially for q2 ∼ 4mc2 ≃ 6.8 GeV2. We perform a detailed numerical analysis and present both predictions and results from the fit obtained using most recent data. We find that non-factorizable power corrections of the expected order of magnitude are sufficient to give a good description of current experimental data within the Standard Model. We discuss in detail the q2 dependence of the corrections and their possible interpretation as shifts of the Standard Model Wilson coefficients.

On Flavourful Easter eggs for New Physics hunger and Lepton Flavour Universality violation

Within the standard approach of effective field theory of weak interactions for

Taming the off-shell Higgs boson

\varDelta B = 1

D\to X_u l^+ l^-

ΔB=1 transitions, we look for possibly unexpected subtle New Physics effects, here dubbed “flavourful Easter eggs”. We perform a Bayesian global fit using the publicly available HEPfit package, taking into account state-of-the-art experimental information concerning these processes, including the suggestive measurements from LHCb of

Conclusions from CDF results on CP violation in D0 → π+π−, K+K− and future tasks

R_{K}

Constraints on new physics from radiative B decays

RK and