Enrico Lunghi

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We update the branching ratios for the inclusive decays B → X s ℓ + ℓ − and the exclusive decays B → (K, K *)ℓ + ℓ − , with ℓ = e, µ, in the standard model by including the explicit O(α s) and Λ QCD /m b corrections. This framework is used in conjunction with the current measurements of the branching ratios for B → X s γ and B → Kℓ + ℓ − decays and upper(More)
We study the implications on flavor changing neutral current and CP violating processes in the context of supersymmetric theories without a new flavor structure (flavor blind supersymmetry). The low energy parameters are determined by the running of the soft breaking terms from the grand unified scale with SUSY phases consistent with the EDM constraints. We(More)
We consider several hints for new physics involving CP-asymmetries in B-decays and interpret them in terms of generic contributions to effective Wilson coefficients. The effects we focus on are: the differences in the fitted value of sin 2β versus the ones directly measured via the time dependent CP asymmetries in B → J/ψK or via B → (φ, η ′)K; the(More)
We study logarithmically enhanced electromagnetic corrections to the decay rate in the high dilepton invariant mass region as well as corrections to the forward backward asymmetry (FBA) of the inclusive rare decay ¯ B → X s ℓ + ℓ −. As expected, the relative effect of these corrections in the high dilepton mass region is around −8% for the muonic final(More)
The direct CP asymmetry in the untagged inclusive channel ¯ B → X s+d γ provides a strict test of the standard model. It has been shown beyond the partonic level that this asymmetry is negligibly small thanks to U-spin relations and to the unitarity of the CKM matrix. In the present paper we investigate this relation beyond the SM; in particular, we analyse(More)
Complex flavour couplings (off-diagonal mass terms) in the squark sector of super-symmetric theories may drastically alter both the rate and the CP-violating asymmetry of certain B-meson decays. We consider the effects of couplings that induce b → s transitions and lead to final state with strangeness one. We investigate the bounds that must be satisfied by(More)
We study the implication of the recent measurement by the BELLE collaboration of the averaged branching fraction ¯ B exp [B → (ρ, ω) γ] = (1.8 +0.6 −0.5 ± 0.1) × 10 −6 for the CKM phenomenology. Combined with the averaged branching fraction ¯ B exp (B → K * γ) = (4.06 ± 0.26) × 10 −5 measured earlier, this yields ¯ R exp [(ρ, ω) γ/K * γ] = (4.2 ± 1.3)% for(More)
We evaluate the one-loop corrections to the Wilson coefficient of the kinetic operator in the operator product expansion of the differential ¯ B → X c ℓ¯ ν decay rate. With a moderate cut on the lepton energy, the one-loop terms change the kinetic operator contributions to spectral moments by about 20%. This amounts to a small correction for leptonic and(More)
We report recent results in rare B decays. Our focus will be on b → dγ and b → sℓ + ℓ − transitions. We discuss their impact on the CKM phenomenology and their role within our search for new physics. In particular, we analyse the impact of a recent lattice QCD estimate of the B → K * form factor at zero recoil. We also briefly discuss the presently(More)