Institute: MPI für Physik     Collection: YB 2016     Display Documents

ID: 715958.0, MPI für Physik / YB 2016
Universality of Gauge Thresholds in Non-Supersymmetric Heterotic Vacua
Authors:
Date of Publication (YYYY-MM-DD):2014
Title of Journal:Physics Letters B
Journal Abbrev.:Phys.Lett.B
Issue / Number:736
Start Page:365
End Page:370
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We compute one-loop threshold corrections to non-abelian gauge couplings in four-dimensional heterotic vacua with spontaneously broken $\\cal N = 2 \\to \\cal N = 0$ supersymmetry, obtained as Scherk-Schwarz reductions of six-dimensional K3 compactifications. As expected, the gauge thresholds are no-longer BPS protected, and receive contributions also from the excitations of the RNS sector. Remarkably, the difference of thresholds for non-abelian gauge couplings is BPS saturated and exhibits a universal behaviour independently of the orbifold realisation of K3. Moreover, the thresholds and their difference develop infra-red logarithmic singularities whenever charged BPS-like states, originating from the twisted RNS sector, become massless at special loci in the classical moduli space.
Classification / Thesaurus:Theoretical Physics
Comment of the Author/Creator:5 pages
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
Affiliations:
Identifiers:
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