ar X iv : h ep - t h / 96 04 12 0 v 1 1 9 A pr 1 99 6 IFUSP - P - 1211 Super - Poincaré Invariant Koba -

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.

ar X iv : h ep - p h / 96 04 26 9 v 1 9 A pr 1 99 6 About the Q 2 dependence of asymmetry A 1

We analyse the proton and deutron data on spin dependent asymmetry A 1 (x, Q 2) supposing the DIS structure functions g 1 (x, Q 2) and F 3 (x, Q 2) have the similar Q 2-dependence. As a result, we have obtained Γ p

ar X iv : h ep - t h / 96 04 04 9 v 1 9 A pr 1 99 6 The exponential map of GL ( N )

A finite expansion of the exponential map for a N ×N matrix is presented. The method uses the Cayley-Hamilton theorem for writing the higher matrix powers in terms of the first N-1 ones. The resulting sums over the corresponding coefficients are rational functions of the eigenvalues of the matrix. ∗ e-mail [email protected]

ar X iv : h ep - t h / 97 11 12 7 v 1 1 7 N ov 1 99 7 1 Supersymmetry in Dimensions Beyond Eleven

Spacetime superalgebras with 64 or less number of real supercharges, containing the type IIB Poincaré superal-gebra in (9, 1) dimensions and the N = 1 Poincaré superalgebra in (10, 1) are considered. The restriction D ≤ 14, and two distinct possibilities arise: The N = (1, 0) superalgebra in (11, 3) dimensions, and the N = (2, 0) super-algebra in (10, 2) dimensions. Emphasizing the former, we d...

ar X iv : h ep - p h / 98 04 40 7 v 1 2 6 A pr 1 99 8 B c → l ν̄γ DECAY IN LIGHT CONE QCD