Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-04-02
Nucl.Phys. B508 (1997) 391-408
Physics
High Energy Physics
High Energy Physics - Theory
23 pages, Latex, psfig.sty, 5 figures, comment and reference added, final version to appear in Nucl. Phys. B
Scientific paper
10.1016/S0550-3213(97)00611-1
We consider the gauge dyonic string solution of the K3 compactified heterotic string theory in a four dimensional cosmological context. Since for this solution Green-Schwarz as well as Chern-Simons corrections have been taken into account it contains both world sheet and string loop corrections. The cosmological picture is obtained by rotating the world volume of the gauge dyonic string into two space like dimensions and compactifying those dimensions on a two torus. We compare the result with gauge neutral extreme and non-extreme cosmologies and find that the non-trivial Yang Mills background leads to a solution without any singularities whereas for trivial Yang-Mills backgrounds some of the fields become always singular at the big bang.
Behrndt Klaus
Forste Stefan
Schwager Stefan
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