ar X iv : h ep - p h / 06 05 26 3 v 2 3 1 M ay 2 00 6 Baryogenesis by R - parity violating top quark decays and neutron - antineutron oscillations

ar X iv : h ep - p h / 06 05 13 6 v 1 1 1 M ay 2 00 6 Lepton Flavor Violating τ and μ decays

ar X iv : h ep - p h / 04 06 26 4 v 1 2 3 Ju n 20 04 IPPP / 04 / 05 DCTP / 04 / 10 Top flavour violating decays in general supersymmetric models

We analyse the top flavour violating decays in general supersymmetric model using the mass insertion approximation. In particular, we discuss the impact of a light right-handed top-squark and large mixing between the first or second and third generation of up-squarks on processes as t → qγ, g. We also take into account the relevant experimental constraints from B-physics and the requirements fo...

ar X iv : h ep - p h / 04 05 11 9 v 1 1 3 M ay 2 00 4 The Lorentz and CPT violating effects on the charged

ar X iv : h ep - p h / 06 05 24 5 v 1 2 3 M ay 2 00 6 Photon helicity in Λ b →

Radiative decays of polarized Λb baryons represent an attractive possibility to measure the helicity of the photon emitted in the b → sγ quark transition and thus to subject the Standard Model to a stringent test at existing and future hadron colliders. The most abundant mode, Λ(1116)γ, is experimentally very challenging because of the long decay length of the Λ(1116). We show that the experime...

ar X iv : h ep - p h / 02 04 30 6 v 2 6 M ay 2 00 2 Cabibbo allowed D → Kπγ decays

The weak radiative Cabibbo allowed decays D + → ¯ K 0 π + γ and D 0 → K − π + γ with nonresonant Kπ are investigated by relying on the factorization approximation for the nonleptonic weak transitions and the model which combines the heavy quark effective theory and the chiral Lagrangian approach. The dominant contributions to the amplitudes come from the long distance effects. The decay amplitu...