/ 98 08 28 1 v 1 1 0 A ug 1 99 8 Neutrino Propagation in Matter

ar X iv : h ep - p h / 98 08 27 6 v 1 1 0 A ug 1 99 8 Superball dark matter 1

Supersymmetric models predict a natural dark-matter candidate , stable baryonic Q-balls. They could be copiously produced in the early Universe as a by-product of the Affleck-Dine baryogenesis. I review the cosmological and astrophysical implications , methods of detection, and the present limits on this form of dark matter.

ar X iv : h ep - p h / 98 08 48 8 v 1 3 1 A ug 1 99 8 UFIFT - HEP - 98 - 19 The case for a Standard Model with Anomalous

A gauged phase symmetry with its anomalies cancelled by a Green-Schwarz mechanism, broken at a large scale by an induced Fayet-Iliopoulos term, is a generic feature of a large class of superstring theories. It induces many desirable phenomenological features: Yukawa coupling hierarchy, the emergence of a small Cabibbo-like expansion parameter, relating the Weinberg angle to b − τ unification, a...

ar X iv : a st ro - p h / 98 08 21 9 v 1 2 0 A ug 1 99 8 Sgr A ∗ : A supermassive black hole or a spatially extended object ?

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 : a st ro - p h / 98 08 02 2 v 1 4 A ug 1 99 8 1 The Luminosity Distance , the Equation of State , and the Geometry of the Universe

The second derivative of the luminosity distance with respect to the redshift is written in terms of the deceleration parameter q0. We point out that the third derivative contains the information of the sound speed of the cosmic matter as well as the curvature of the universe. There is a relation between the coefficients in a flat universe model with matter such that cs0(1 + wx0) = 0 (cs0 is th...