ar X iv : h ep - t h / 06 05 06 9 v 2 2 7 M ay 2 00 7 Extended 2 d generalized dilaton gravity theories

ar X iv : h ep - t h / 06 05 27 5 v 1 2 9 M ay 2 00 6 Second Order Noncommutative Corrections to Gravity

In this work, we calculate the leading order corrections to general relativity formulated on a canonical noncommutative spacetime. These corrections appear in the second order of the expansion in theta. First order corrections can only appear in the gravity-matter interactions. Some implications are briefly discussed. [email protected] [email protected]

ar X iv : h ep - p h / 06 05 26 3 v 2 3 1 M ay 2 00 6 Baryogenesis by R - parity violating top quark decays and neutron - antineutron oscillations

Generation of the cosmological baryon asymmetry in SUSY based model with broken R-parity and low scale gravity is considered. The model allows for a long-life time or even stable proton and observable neutron-antineutron oscillations.

ar X iv : h ep - t h / 06 05 17 1 v 1 1 7 M ay 2 00 6 M - Theory of Matrix Models

Small M-theories unify various models of a given family in the same way as the M-theory unifies a variety of superstring models. We consider this idea in application to the family of eigenvalue matrix models: their M-theory unifies various branches of Hermitean matrix model (including Dijkgraaf-Vafa partition functions) with Kontsevich τ-function. Moreover, the corresponding duality relations l...

ar X iv : h ep - p h / 06 05 13 6 v 1 1 1 M ay 2 00 6 Lepton Flavor Violating τ and μ decays

ar X iv : h ep - t h / 03 05 03 7 v 2 3 0 M ay 2 00 3 FORMS ON VECTOR BUNDLES OVER COMPACT REAL HYPERBOLIC MANIFOLDS

We study gauge theories based on abelian p− forms on real compact hyperbolic manifolds. The tensor kernel trace formula and the spectral functions associated with free generalized gauge fields are analyzed.