ar X iv : h ep - t h / 05 06 21 8 v 1 2 6 Ju n 20 05 Conjecture on the Avoidance of the Big Crunch

ar X iv : h ep - t h / 05 06 19 5 v 1 2 3 Ju n 20 05 Geometric transitions and mixed Hodge structures

We formulate and prove a B-model disc level large N duality result for general conifold transitions between compact Calabi-Yau spaces using degenerations of Hodge structures.

ar X iv : h ep - t h / 05 06 19 7 v 2 2 4 Ju n 20 05 The emergence of noncommutative target space in noncritical string theory

We show how a noncommutative phase space appears in a natural way in noncritical string theory, the noncommutative deformation parameter being the string coupling.

ar X iv : h ep - p h / 05 06 11 1 v 2 1 4 Ju n 20 05 Transverse positron polarization in the μ + → e + ν̄ μ ν e decay in

ar X iv : h ep - t h / 05 06 08 2 v 1 1 0 Ju n 20 05 Multi - ( super ) graviton theory on topologically non - trivial backgrounds

It is shown that in some multi-supergraviton models, the contributions to the effective potential due to a non-trivial topology can be positive, giving rise in this way to a positive cosmological constant, as demanded by cosmological observations.

ar X iv : h ep - p h / 05 06 15 3 v 1 1 6 Ju n 20 05 PITHA - 05 - 08 CKM Overview and Determinations from B Decays

This talk gives an introduction to the Standard Model Cabibbo-Kobayashi-Maskawa matrix and methods to extract information on the parameters of the unitarity triangle from B decays.