Journal
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
Volume 58, Issue 7-9, Pages 748-752Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/prop.201000058
Keywords
String phenomenology; mu-problem; NMSSM
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We discuss recent developments on the solution of the so-called supersymmetric p-problem in the context of heterotic orbifolds. In particular, an approximate R symmetry can induce an admissible A-term in Minkowski vacua of orbifold models with the MSSM spectrum. A natural solution to the it-problem is offered by explicitly string derived NMSSMs. These models also ameliorate the fine-tuning of the MSSM. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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