ar X iv : h ep - p h / 98 05 23 2 v 1 6 M ay 1 99 8 Mass Corrections to the Tau Decay Rate

ar X iv : h ep - p h / 98 05 46 8 v 1 2 6 M ay 1 99 8 COURSE HEAVY QUARK PHYSICS

ar X iv : h ep - p h / 98 05 31 5 v 1 1 3 M ay 1 99 8 hep - ph / 9805315 Edinburgh 98 / 6 DFTT 22 / 98 CORRECTIONS AT SMALL X

We show that the all order summation of small x logarithms cannot be included in the Q evolution of structure functions because the NLLx corrections overwhelm the LLx contribution. Talk at the ‘6th International Workshop on Deep Inelastic Scattering and QCD’ (DIS98), Brussels, April 1998 to be published in the proceedings

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 6 v 1 1 1 M ay 1 99 8 LA - UR - 98 - 1915 Hadron Spectroscopy in Regge Phenomenology ∗

We show that linear Regge trajectories for mesons and baryons, and the cubic mass spectrum associated with them, determine expressions for the hadron masses in terms of the universal Regge slope α ′ alone. The ground state hadron masses as calculated from these expressions are in excellent agreement with experiment for α ′ = 0.85 GeV −2 .

ar X iv : h ep - p h / 99 05 54 3 v 1 2 9 M ay 1 99 9 Effective Field Theory Approach to Pionium

The various dynamical scales below the pion mass involved in π + π − atoms are sequentially integrated out using non-relativistic effective field theory techniques. This allows us to systematically organise the corrections to the energy levels and decay width. We present our results in terms of a single unknown constant which may be obtained by matching to the Chiral Lagrangian with electromagn...