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Remarks on gaugino screening

Timothy Cohen1, Anson Hook1, and Brian Wecht2,3

  • 1Theory Group, SLAC National Accelerator Laboratory, Menlo Park, California 94025 USA
  • 2Center for the Fundamental Laws of Nature, Harvard University, Cambridge, Massachusetts 02138 USA
  • 3Centre for Research in String Theory, Department of Physics, Queen Mary University of London, Mile End Road, London E1 4NS, UK

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Phys. Rev. D 85, 115004 – Published 7 June, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.115004

Abstract

Gauge-mediated models of supersymmetry breaking (SUSY) often exhibit “gaugino screening,” where to leading order in F, gaugino masses are unaffected by higher-dimensional Kähler potential interactions between the SUSY spurion and the messengers. We provide a derivation of this phenomenon which uses the gaugino counterterm originally proposed in the context of anomaly mediation by Dine and Seiberg. We argue that this counterterm is present when there are nonzero messenger F-terms and it can cancel the leading order Feynman diagram contribution to the gaugino mass. We provide a nontrivial check of the regulator independence of our results by performing the computation using both dimensional reduction and Pauli-Villars. This analysis reconciles an apparent contradiction between diagrammatics and analytic continuation into superspace.

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Phys. Rev. D 85, 115004– Published 7 June, 2012
  • Received 2 February 2012
Article part of CHORUS

© 2012 American Physical Society

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