ar X iv : h ep - p h / 99 05 22 8 v 1 4 M ay 1 99 9 Hadronic Total Cross - sections Through Soft Gluon Summation in Impact Parameter Space

ar X iv : h ep - p h / 99 05 43 8 v 1 2 1 M ay 1 99 9

An enhancement for the η production in proton-neutron collisions as compared with that in proton-proton scattering has been recently observed. We present a calculation for the production cross section, in proton-neutron collisions near threshold, within instanton model for the QCD vacuum and show that a specific flavor dependent nonperturbative quark-gluon interaction related to instantons is a...

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 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 / 94 05 25 5 v 1 9 M ay 1 99 4 6453 April , 1994 ( T / E ) Spin , Mass , and Symmetry

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

In this note radiative corrections to the total hadronic decay rate of the τ-lepton are studied employing perturbative QCD and the operator product expansion. We calculate quadratic quark mass corrections to the decay rate ration R τ to the order O(α 2 s m 2) and find that they contribute appreciably to the Cabbibo supressed decay modes of the τ-lepton. We also discuss corrections of mass dimen...