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arXiv · hep-th/9307123

Charged string solutions with dilaton and modulus fields

M. Cvetic·A. A. Tseytlin
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Abstract

We find charged, abelian, spherically symmetric solutions (in flat space-time) corresponding to the effective action of $D=4$ heterotic string theory with scale-dependent dilaton $\p$ and modulus $\vp$ fields. We take into account perturbative (genus-one), moduli-dependent `threshold' corrections to the coupling function $f(\p,\vp)$ in the gauge field kinetic term $f(\p,\vp) F^2_{\m\n}$, as well as non-perturbative scalar potential $V(\p, \vp)$, e.g. induced by gaugino condensation in the hidden gauge sector. Stable, finite energy, electric solutions (corresponding to on abelian subgroup of a non-abelian gauge group) have the small scale region as the weak coupling region ($ϕ\ra -\infty$) with the modulus $\vp$ slowly varying towards smaller values. Stable, finite energy, abelian magnetic solutions exist only for a specific range of threshold correction parameters. At small scales they correspond to the strong coupling region ($\p\ra \infty$) and the compactification region ($\vp\ra 0$). The non-perturbative potential $V$ plays a crucial role at large scales, where it fixes the asymptotic values of $ϕ$ and $\vp$ to be at the minimum of $V$.

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BibTeXRIS

M. Cvetic, A. A. Tseytlin. 1993-11-19. Charged string solutions with dilaton and modulus fields. https://doi.org/10.1016/0550-3213(94)90581-9

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