ar X iv : h ep - t h / 96 05 08 6 v 1 1 3 M ay 1 99 6 Curvature expansion for the background – induced gluodynamics string

ar X iv : h ep - t h / 96 05 00 7 v 1 2 M ay 1 99 6 SFU - HEP - 04 - 96 String Theory In Curved Space - Time

Intrinsic and extrinsic geometric properties of string world sheets in curved space-time background are explored. In our formulation, the only dynamical degrees of freedom of the string are its immersion coordinates. Classical equation of motion and the space-time energy-momentum tensor of the string are obtained. The equations of motion for the extrinsic curvature action are second order for t...

ar X iv : h ep - p h / 96 05 28 2 v 1 1 1 M ay 1 99 6 TWO TOPICS IN PARTICLE - ANTIPARTICLE MIXING

ar X iv : h ep - t h / 96 05 13 9 v 1 2 1 M ay 1 99 6 Differential Renormalization of QCD in the Background - Field Method

A short outline is given on the application of differential regularization to QCD in the background-field method. The derivation of the propagators in the background gluon field as short-distance expansions is described and the renormalization of the theory is mentioned.

ar X iv : h ep - p h / 96 05 44 0 v 1 3 0 M ay 1 99 6 LTH 372 hep - ph / 9605440 The three - loop SSM β - functions

We present the supersymmetric standard model three-loop β-functions for gauge and Yukawa couplings and consider the effect of three-loop corrections on the standard running

ar X iv : h ep - t h / 96 04 15 9 v 1 2 5 A pr 1 99 6 BGU - PH - 96 / 08 SPECTRUM OF COSMIC GRAVITATIONAL WAVE BACKGROUND

Models of string cosmology predict a stochastic background of gravitational waves with a spectrum that is strongly tilted towards high frequencies. I give simple approximate expressions for spectral densities of the cosmic background which can be directly compared with sensitivities of gravitational wave detectors.