Supersymmetry Breaking by Type II Seesaw Assisted Anomaly Mediation

Details Supersymmetry Breaking by Type II Seesaw Assisted Anomaly Mediation Supersymmetry Breaking by Type II Seesaw Assisted Anomaly Mediation

2007-11-06

arxiv.org/abs/0711.0956v2

Phys.Rev.D77:115017,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 4 figures, added references, added footnotes

Scientific paper

10.1103/PhysRevD.77.115017

Anomaly mediated supersymmetry breaking (AMSB), when implemented in MSSM is known to suffer from the problem of negative slepton mass squared leading to breakdown of electric charge conservation. We show however that when MSSM is extended to explain small neutrino masses by including a pair of superheavy Higgs triplet superfields (the type II seesaw mechanism), the slepton masses can be deflected from the pure AMSB trajectory and become positive. In a simple model we present in this paper, the seesaw scale is about $10^{13}-10^{14}{\rm GeV}$. Gauge coupling unification can be maintained by embedding the triplet to SU(5) {\bf 15}-multiplet. In this scenario, bino is the LSP and its mass is nearly degenerate with NLSP slepton when the triplet mass is right around the seesaw scale.

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