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We update the branching ratios for the inclusive decays B → Xsll and the exclusive decays B → (K,K∗)l+l−, with l = e, μ, in the standard model by including the explicit O(αs) and ΛQCD/mb corrections. This framework is used in conjunction with the current measurements of the branching ratios for B → Xsγ and B → Kl+l− decays and upper limits on the branching… (More)

We present a theoretical reappraisal of the branching ratios and CP asymmetries for the decays B → Xqll, with q = d, s, taking into account current theoretical uncertainties in the description of the inclusive decay amplitudes from the long-distance contributions, an improved treatment of the renormalization scale dependence, and other parametric… (More)

Using a theoretical framework based on the next-to-leading order QCD-improved effective Hamiltonian and a factorization Ansatz for the hadronic matrix elements of the four-quark operators, we reassess branching fractions in two-body non-leptonic decays B → PP, PV, V V , involving the lowest lying light pseudoscalar (P ) and vector (V ) mesons in the… (More)

The angular correlation of the electrons emitted in the neutrinoless double beta decay (0ν2β) is presented using a general Lorentz invariant effective Lagrangian for the leptonic and hadronic charged weak currents. We show that the coefficient K in the angular correlation dΓ/d cos θ ∝ (1 − K cos θ) is essentially independent of the nuclear matrix element… (More)

- Amani M. El Amin Ali, A. V. Borisov, N. B. Zamorin
- 2001

We discuss same-sign dilepton production mediated by Majorana neutrinos in highenergy proton-proton collisions pp → llX for l, l = e, μ, τ at the LHC energy √ s = 14 TeV, and in the rare decays of K, D, Ds, and B mesons of the type M + → M ll. For the pp reaction, assuming one heavy Majorana neutrino of mass mN , we present discovery limits in the (mN ,… (More)

- Amani M. El Amin Ali, A Ya Parkhomenko
- 2008

We calculate the so-called hard spectator corrections in O(αs) in the leading-twist approximation to the decay widths for B → ργ and B → ργ decays and their charge conjugates, using Large Energy Effective Theory techniques. These are combined with the hard vertex corrections and annihilation contributions to compute the branching ratios for these decays in… (More)

We update the branching ratios for the inclusive decays B → Xs`+`− and the exclusive decays B → (K,K∗)`+`−, with ` = e, μ, in the standard model by including the explicit O(αs) and ΛQCD/mb corrections. This framework is used in conjunction with the current measurements of the branching ratios for B → Xsγ and B → K`+`− decays and upper limits on the… (More)

Abstract. We discuss rare meson decays K → πll and D → Kll (l, l = e, μ) in a supersymmetric extension of the standard model with explicit breaking of R-parity by bilinear Yukawa couplings in the superpotential. Estimates of the branching ratios for these decays are given. We also compare our numerical results with analogous ones previously obtained for two… (More)