ar X iv : h ep - t h / 98 08 08 5 v 2 2 5 A ug 1 99 8 Gravitational Entropy and Global Structure

ar X iv : h ep - p h / 98 08 47 2 v 1 2 9 A ug 1 99 8 UH - 511 - 913 - 98 August 1998 CP VIOLATION IN HYPERON DECAYS

The theory and phenomenology of CP violation in hyperon decays is summarized.

ar X iv : h ep - t h / 05 08 08 7 v 1 1 1 A ug 2 00 5 Fundamental Commutators in a Gravitational Field

We show how an induced invariance of the massless particle action can be used to construct an extension of the Heisenberg canonical commuta-tion relations in a non-commutative space-time.

ar X iv : h ep - p h / 98 08 41 1 v 1 2 5 A ug 1 99 8 EXPERIMENTAL CONSTRAINTS ON THE CABIBBO - KOBAYASHI - MASKAWA MATRIX

The LEP investigation of the B 0 d and B 0 s oscillations and of the Cabibbo-Kobayashi-Maskawa matrix element |V ub | improve the constraints on the other elements of this matrix. From a fit to the experimental data and the theory calculations it is possible to determine the vertex of the unitarity triangle as:

ar X iv : m at h / 98 08 06 5 v 1 [ m at h . Q A ] 1 4 A ug 1 99 8 QUANTUM DETERMINANTS AND QUASIDETERMINANTS

ar X iv : h ep - p h / 98 08 45 2 v 1 2 8 A ug 1 99 8 JLAB - THY 98 – 33

Explicit quark-hadron duality in the limit of heavy quark mass is studied using the ’t Hooft model, where both partonic and hadronic amplitudes may be computed exactly. Results for weak decays of heavy mesons are presented for both standard spectator decays, where the duality limit is convincingly approached, and annihilation decays of the valence quark-antiquark pair, where the approach to asy...