N ov 1 99 5 KNU - TH - 25 , February 1995 New Asymptotic Expansion Method

ar X iv : g r - qc / 9 51 10 66 v 1 2 4 N ov 1 99 5 Scalar Field Inhomogeneous

Some exact solutions for the Einstein field equations corresponding to inhomogeneous G 2 cosmologies with an exponential-potential scalar field which generalize solutions obtained previously are considered. Several particular cases are studied and the properties related to generalized inflation and asymptotic behaviour of the models are discussed.

ar X iv : h ep - t h / 95 11 17 9 v 1 2 5 N ov 1 99 5 UNIVERSALITY FOR SU ( 2 ) YANG - MILLS THEORY IN ( 2 + 1 ) D

The Green's Function Monte Carlo method of Chin et al is applied to SU(2) Yang-Mills theory in (2+1)D. Accurate measurements are obtained for the ground-state energy and mean plaquette value, and for various Wilson loops. The results are compared with series expansions and coupled cluster estimates, and with the Euclidean Monte Carlo results of Teper. A striking demonstration of universality be...

ar X iv : h ep - p h / 95 11 41 2 v 1 2 4 N ov 1 99 5 UWThPh - 1995 - 36 November 1995 Low – Energy QCD

After a brief introduction to chiral perturbation theory, the effective field theory of the standard model at low energies, two recent applications are reviewed: elastic pion–pion scattering to two– loop accuracy and the complete renormalized pion–nucleon Lagrangian to O(p 3) in the chiral expansion.

ar X iv : n uc l - th / 9 51 10 36 v 1 2 9 N ov 1 99 5 Roper Excitation in Alpha - Proton Scattering

We study the Roper excitation in the (α, α ′) reaction. We consider all processes which may be relevant in the Roper excitation region, namely, Roper excitation in the target, Roper excitation in the projectile, and double ∆ excitation processes. The theoretical investigation shows that the Roper excitation in the proton target mediated by an isoscalar exchange is the dominant mechanism in the ...

ar X iv : g r - qc / 9 51 10 48 v 1 1 6 N ov 1 99 5 Two lectures on Two - Dimensional Gravity ∗