ar X iv : h ep - p h / 96 10 21 7 v 1 2 O ct 1 99 6 Lifetime of ( π + π − ) Atom : Analysis of the Role of Strong Interactions

ar X iv : h ep - p h / 99 10 24 8 v 1 6 O ct 1 99 9 1 Effect of σ ( 600 ) - Production in pp̄ → 3 π 0 at rest

ar X iv : h ep - p h / 98 10 52 7 v 1 2 9 O ct 1 99 8 HIGHER - TWIST CONTRIBUTIONS IN EXCLUSIVE PROCESSES

Using the renormalon technique, we estimate higher-twist contributions in deeply virtual Compton scattering and in hard exclusive π 0 leptoproduction.

ar X iv : h ep - p h / 96 08 21 6 v 1 2 A ug 1 99 6 Quark Masses , Chiral Symmetry , and the U ( 1 ) Anomaly

I discuss the mass parameters appearing in the gauge theory of the strong interactions , concentrating on the two flavor case. I show how the effect of the CP violating parameter θ is simply interpreted in terms of the state of the aether via an effective potential for meson fields. For degenerate flavors I show that a first order phase transition is expected at θ = π. I speculate on the implic...

ar X iv : h ep - l at / 9 71 00 37 v 1 9 O ct 1 99 7 1

We compute the lower moments of the structure functions of π and ρ. Of particular interest are the spin-dependent structure functions of the ρ as they give new information about quark binding effects.

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...