Light third-generation squarks from flavour gauge messengers

Felix Brümmer; Moritz McGarrie; Andreas Weiler

doi:10.1007/JHEP04(2014)078

Light third-generation squarks from flavour gauge messengers

Felix Brümmer
, Moritz McGarrie
, Andreas Weiler

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)_F symmetry acting on the quark superfields. If SU(3)_F is broken nonsupersymmetrically by F -term vacuum expectation values, the massive gauge bosons and gauginos become messengers for SUSY breaking mediation. These gauge messenger fields induce a flavour-dependent, negative contribution to the soft masses of the squarks at one loop. In combination with the soft terms from standard gauge mediation, one obtains large and degenerate first- and second-generation squark masses, while the stops and sbottoms are light. We discuss the implications of this mechanism for the superparticle spectrum and for flavour precision observables. We also provide an explicit realization in a model with simultaneous SUSY and SU(3)_F breaking.

Original language	English
Article number	78
Journal	Journal of High Energy Physics
Volume	2014
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2014)078
State	Published - Apr 2014
Externally published	Yes

Keywords

Beyond Standard Model
Supersymmetric Standard Model
Supersymmetry Breaking

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10.1007/JHEP04(2014)078

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abstract = "We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)F symmetry acting on the quark superfields. If SU(3)F is broken nonsupersymmetrically by F -term vacuum expectation values, the massive gauge bosons and gauginos become messengers for SUSY breaking mediation. These gauge messenger fields induce a flavour-dependent, negative contribution to the soft masses of the squarks at one loop. In combination with the soft terms from standard gauge mediation, one obtains large and degenerate first- and second-generation squark masses, while the stops and sbottoms are light. We discuss the implications of this mechanism for the superparticle spectrum and for flavour precision observables. We also provide an explicit realization in a model with simultaneous SUSY and SU(3)F breaking.",

keywords = "Beyond Standard Model, Supersymmetric Standard Model, Supersymmetry Breaking",

author = "Felix Br{\"u}mmer and Moritz McGarrie and Andreas Weiler",

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AU - McGarrie, Moritz

AU - Weiler, Andreas

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N2 - We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)F symmetry acting on the quark superfields. If SU(3)F is broken nonsupersymmetrically by F -term vacuum expectation values, the massive gauge bosons and gauginos become messengers for SUSY breaking mediation. These gauge messenger fields induce a flavour-dependent, negative contribution to the soft masses of the squarks at one loop. In combination with the soft terms from standard gauge mediation, one obtains large and degenerate first- and second-generation squark masses, while the stops and sbottoms are light. We discuss the implications of this mechanism for the superparticle spectrum and for flavour precision observables. We also provide an explicit realization in a model with simultaneous SUSY and SU(3)F breaking.

AB - We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)F symmetry acting on the quark superfields. If SU(3)F is broken nonsupersymmetrically by F -term vacuum expectation values, the massive gauge bosons and gauginos become messengers for SUSY breaking mediation. These gauge messenger fields induce a flavour-dependent, negative contribution to the soft masses of the squarks at one loop. In combination with the soft terms from standard gauge mediation, one obtains large and degenerate first- and second-generation squark masses, while the stops and sbottoms are light. We discuss the implications of this mechanism for the superparticle spectrum and for flavour precision observables. We also provide an explicit realization in a model with simultaneous SUSY and SU(3)F breaking.

KW - Beyond Standard Model

KW - Supersymmetric Standard Model

KW - Supersymmetry Breaking

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DO - 10.1007/JHEP04(2014)078

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SN - 1126-6708

VL - 2014

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 4

M1 - 78

ER -

Light third-generation squarks from flavour gauge messengers

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Keywords

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