TY - JOUR
T1 - Making ends meet
T2 - String unification and low-energy data
AU - Dienes, Keith R.
AU - Faraggi, Alon E.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1995
Y1 - 1995
N2 - We examine the effects that may resolve the disagreement between string-scale unification and low-energy data. These include string threshold corrections, nonstandard hypercharge normalizations, light supersymmetric thresholds, intermediate gauge structure, and extra matter beyond the minimal supersymmetric standard model. We explicitly evaluate these effects within the flipped SU(5), SO(6)×SO(4), and various SU(3)×SU(2)×U(1) string models, and surprisingly find that the only way to reconcile string unification with low-energy data is through certain types of extra matter. Remarkably, many of the realistic string models contain precisely this required matter in their massless spectra.
AB - We examine the effects that may resolve the disagreement between string-scale unification and low-energy data. These include string threshold corrections, nonstandard hypercharge normalizations, light supersymmetric thresholds, intermediate gauge structure, and extra matter beyond the minimal supersymmetric standard model. We explicitly evaluate these effects within the flipped SU(5), SO(6)×SO(4), and various SU(3)×SU(2)×U(1) string models, and surprisingly find that the only way to reconcile string unification with low-energy data is through certain types of extra matter. Remarkably, many of the realistic string models contain precisely this required matter in their massless spectra.
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U2 - 10.1103/PhysRevLett.75.2646
DO - 10.1103/PhysRevLett.75.2646
M3 - Article
AN - SCOPUS:0001237850
VL - 75
SP - 2646
EP - 2649
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
ER -