Phenomenological aspects of heterotic orbifold models at one loop

Birkedal-Hansen, A. ; Binetruy, P. ; Mambrini, Y. ; Nelson, B.

Lawrence Berkeley National Laboratory

关键词: Neutral Currents;    Magnetic Moments;    Lagrangian Function;    Supergravity;    72 Physics Of Elementary Particles And Fields;   

DOI  :  10.2172/842733
RP-ID  :  LBNL--53419
RP-ID  :  AC03-76SF00098
RP-ID  :  842733

美国|英语

来源: UNT Digital Library

【 摘 要 】

We provide a detailed study of the phenomenology of orbifold compactifications of the heterotic string within the context of supergravity effective theories. Our investigation focuses on those models where the soft Lagrangian is dominated by loop contributions to the various soft supersymmetry breaking parameters. Such models typically predict non-universal soft masses and are thus significantly different from minimal supergravity and other universal models. We consider the pattern of masses that are governed by these soft terms and investigate the implications of certain indirect constraints on supersymmetric models, such as flavor-changing neutral currents, the anomalous magnetic moment of the muon and the density of thermal relic neutralinos. These string-motivated models show novel behavior that interpolates between the phenomenology of unified supergravity models and models dominated by the superconformal anomaly.