Gauge Coupling Constant Unification With Planck Scale Values Of Moduli

Abstract

Convergence of the standard model gauge coupling constants to a common value at around $2\times 10^{16}$ GeV is studied in the context of orbifold theories where the modular symmetry groups for $T$ and $U$ moduli are broken to subgroups of $PSL(2,Z)$. The values of the moduli required for this unification of coupling constants are studied for this case and also for the case where string unification is accompanied by unification to a gauge group larger then $SU(3)\times SU(2)\times U(1).$

Tex, 15 pages, minor typos corrected and some references added

References in corpus (12)

• Duality Anomaly Cancellation, Minimal String Unification and the Effective Low-Energy Lagrangian of 4-D Strings
• Threshold Corrections to Gauge Couplings in Orbifold Compactifications
• Gauge Coupling Running in Minimal SU(3)xSU(2)xU(1) Superstring Unification
• Gauge Coupling Unification in Realistic Free-Fermionic String Models
• Making Ends Meet: String Unification and Low-Energy Data
• String Loop Threshold Corrections \break For ${\mathbf{Z}}_N$ Coxeter Orbifolds
• Duality Symmetries in Orbifold Models
• Modular Symmetries, Threshold Corrections And Moduli For $Z_2\times Z_2$ Orbifolds
• Modular Symmetries in $Z_N$ Orbifold Compactified String Theories with Wilson lines
• Anisotropic Solutions For Orbifold Moduli From Duality Invariant Gaugino Condensates
• Modular Groups for Twisted Narain Models
• Background Symmetries In Orbifolds With Discrete Wilson Lines

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• String Theory and the Path to Unification: A Review of Recent Developments
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