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Phenomenological aspects of heterotic orbifold models at one loop

  • Theoretical Physics
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Abstract

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. We also comment on the possible discovery of these models at the LHC. These string-motivated models show a novel behavior that interpolates between the phenomenology of unified supergravity models and models dominated by the superconformal anomaly.

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Authors and Affiliations

  1. Laboratoire de Physique Théorique, Université Paris-Sud, 91405, Orsay, France

    P. Binétruy & Y. Mambrini

  2. Department of Physics and Theoretical Physics Group, Lawrence Berkeley Laboratory, University of California, Berkeley, CA, 94720, USA

    A. Birkedal-Hansen

  3. Michigan Center for Theoretical Physics, Randall Laboratory, University of Michigan, Ann Arbor, MI, 48109, USA

    B.D. Nelson

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  1. P. Binétruy
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  2. A. Birkedal-Hansen
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  3. Y. Mambrini
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Correspondence to B.D. Nelson.

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11.25.Wx, 12.60.Jv, 04.65.+e

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Binétruy, P., Birkedal-Hansen, A., Mambrini, Y. et al. Phenomenological aspects of heterotic orbifold models at one loop. Eur. Phys. J. C 47, 481–505 (2006). https://doi.org/10.1140/epjc/s2006-02541-7

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