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Sequestered gravity in gauge mediation.

Ignatios Antoniadis1, Karim Benakli2, Mariano Quiros3

  • 1Sorbonne Universités, UPMC Univ Paris 06, UMR 7589, LPTHE, 75005 Paris, France ; CNRS, UMR 7589, LPTHE, 75005 Paris, France ; Albert Einstein Center, Institute for Theoretical Physics, Bern University, Sidlestrasse 5, 3012 Bern, Switzerland.

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|March 11, 2017
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Summary
This summary is machine-generated.

We introduce a new supersymmetry breaking mechanism within string theory, combining gravity and gauge mediation benefits. This model predicts a neutralino as a dark matter candidate and fixes key particle masses at high energy scales.

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Area of Science:

  • High Energy Physics
  • String Theory
  • Supersymmetry Breaking

Background:

  • The Standard Model requires extensions to explain dark matter and particle masses.
  • Supersymmetry (SUSY) offers a theoretical framework but requires a breaking mechanism.
  • Existing mediation mechanisms like gravity and gauge mediation have limitations.

Purpose of the Study:

  • To propose a novel, embeddable mechanism for supersymmetry breaking in string theory.
  • To unify advantages of sequestered gravity and gauge mediation.
  • To identify viable dark matter candidates and predict mass scales.

Main Methods:

  • Utilizing a Scherk-Schwarz deformation along a compact extra dimension.
  • Employing a brane stack supporting the supersymmetric Standard Model extension.
  • Mediating supersymmetry breaking via massive messengers with specific gauge transformations.

Main Results:

  • The mechanism fixes the gravitino and bulk gaugino masses at approximately 10^11 GeV.
  • A neutralino is identified as a viable dark matter candidate (LSP).
  • Higgsino mass and soft Higgs-bilinear terms are generated at comparable magnitudes to other soft terms.

Conclusions:

  • The proposed mechanism offers a consistent framework for supersymmetry breaking in string theory.
  • It successfully integrates desirable features of gravity and gauge mediation.
  • The model provides testable predictions for dark matter and particle physics experiments.