CERN-TH/96-153 hep-th/9611205

CERN-TH/96-32 IP-BBSR/96-9 hep-th/9602087 GRACEFUL EXIT IN QUANTUM STRING COSMOLOGY

We write an O(d, d)-covariant Wheeler-De Witt equation in the (d + 1)-dimensional minisuperspace of low-energy cosmological string backgrounds. We discuss explicit examples of transitions between two duality-related cosmological phases, and we find a finite quantum transition probability even when the two phases are classically separated by a curvature singularity. This quantum approach is comp...

v 1 1 0 O ct 1 99 6 hep - th / 9610074 CERN - TH / 96 - 277 USC - 96 / HEP - B 6 BLACK HOLE ENTROPY REVEALS A 12 th DIMENSION 1

The Beckenstein-Hawking black hole entropy in string theory and its generalizations , as expressed in terms of charges that correspond to central extensions of the supersymmetry algebra, has more symmetries than U-duality. It is invariant under transformations of the charges, involving a 12th (or 13th) " dimension ". This is an indication that the secret theory behind string theory has a supera...

ar X iv : h ep - p h / 96 06 23 7 v 1 4 J un 1 99 6 Stability Bounds on Flavor - Violating Trilinear Soft Terms in the MSSM ∗

The stability of the standard vacuum imposes constraints on flavor violating trilinear soft terms which are stronger than the laboratory bounds coming from the absence of neutral flavor violations (FCNC). Furthermore, contrary to the FCNC bounds, these constraints persist even if the scale of supersymmetry breaking is arbitrarily large. CERN-TH-96/116 SCIPP-96-22 SU-ITP 96/16 IEM-FT-131/96 May ...

CERN-TH/97-365 hep-th/9712164 D–INSTANTON CORRECTIONS AS (p,q)–STRING EFFECTS AND NON–RENORMALIZATION THEOREMS ⋆

Theoretical Aspects of Dark Matter Detection

Direct and indirect dark matter detection relies on the scattering of the dark matter candidate on nucleons or nuclei. Here, attention is focused on dark matter candidates (neutralinos) predicted in the minimal supersymmetric standard model and its constrained version with universal input soft supersymmetry-breaking masses. Current expectations for elastic scattering cross sections for neutrali...