ar X iv : h ep - p h / 97 10 28 5 v 1 8 O ct 1 99 7 Two body non - leptonic Λ b decays in the large N c limit

ar X iv : h ep - p h / 99 10 50 5 v 1 2 7 O ct 1 99 9 QCD factorization for exclusive , non - leptonic B decays

Exclusive, non-leptonic, two-body decays of B mesons simplify greatly in the heavy quark limit. In this talk I discuss the factorized structure that holds in this limit and some of its consequences: (a) naive factorization is recovered in a certain limit; (b) 'non-factorizable' effects are hard and can be calculated; (c) strong interaction phases vanish in the heavy quark limit (and can be calc...

ar X iv : h ep - p h / 97 10 32 3 v 1 1 3 O ct 1 99 7 Radiative Leptonic B Decays in the Light Front Model

Within the light front framework, we calculate the form factors for B → γ transitions directly in the entire physical range of momentum transfer. Using these form factors, we study the radiative decays of B → lνlγ and Bs(d) → νν̄γ. We show that the decay rates of B → lνlγ (l = e, μ) and B → νν̄γ are larger than that of the corresponding purely leptonic modes. Explicitly, in the standard model, we...

ar X iv : h ep - p h / 98 05 30 4 v 1 1 3 M ay 1 99 8 Λ b → Λ c P ( V ) Nonleptonic Weak Decays

ar X iv : h ep - p h / 98 05 28 7 v 1 1 1 M ay 1 99 8 FERMILAB – PUB – 97 / 231 – T Heavy Baryon Production and Decay

The branching ratio B(Λ c → pK − π +) normalizes the production and decay of charmed and bottom baryons. At present, this crucial branching ratio is extracted dominantly from B → baryons analyses. This note questions several of the underlying assumptions and predicts sizable B → D (*) N N ′ X transitions , which were traditionally neglected. It predicts B(Λ c → pK − π +) to be significantly lar...

ar X iv : h ep - p h / 98 07 50 9 v 2 1 7 N ov 1 99 8 Systematics of single superpartners production at leptonic colliders ∗

We examine the effects of the lepton number violating R parity odd superpotential, W = λ ijk LiLjE c k , on single production of fermion (charginos and neutralinos) and scalar (sleptons and sneutrinos) super-partners at leptonic colliders for center of mass energies up to 500GeV − 1T eV. The probability amplitudes for all the five 2 → 2 body processes: l