1997/03/28 by M. Chemtob, Marc Chemtob
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Curvature #Gauge theory #Geometry #Gravitation #Mathematical physics #Mathematics #Orbifold #Physics #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Quartic function #String (physics) #String field theory #Theoretical physics #hep-th
paper · pdf · doi:10.1103/physrevd.56.2323
published as Phys.Rev.D56:2323-2351,1997 · Latex File. 47 pages. 3 postscript figures
arxiv created 1997/03/28 · openalex publication_date 1997/08/15 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The string theory one-loop threshold corrections are studied in a background field approach due to Kiritsis and Kounnas which uses space-time curvature as an infrared regulator. We review the conformal field theory aspects of the method for the special case of the semiwormhole space-time solution. The comparison between the string and effective field theories vacuum functionals is made for the low-derivative order, as well as for certain higher-derivative, gauge and gravitational interactions. We study the dependence of string loop renormalization corrections on the infrared cutoff. Numerical applications are considered for a sample of four-dimensional Abelian orbifold models with a view to deduce the systematic trends of the moduli-independent threshold corrections. The implications on the perturbative string theory unification are examined. We present numerical results for the gauge interactions coupling constants as well as for the quadratic order gravitational (R2) and the quartic order gauge (F4) interactions.