Scherk-Schwarz breaking yields a Dirac gravitino whose mixing lacks a local N=1 superspace realization in minimal supergravity and whose matter couplings produce standard scalar thresholds plus UV-dependent Dirac fermion masses.
Dirac Gaugino Masses and Supersoft Supersymmetry Breaking
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abstract
We introduce a new supersymmetric extension of the standard model in which the gauge sector contains complete N=2 supersymmetry multiplets. Supersymmetry breaking from the D-term vev of a hidden sector U(1) gauge field leads to Dirac soft supersymmetry breaking gaugino masses, and a new type of soft scalar trilinear couplings. The resulting squark and slepton masses are finite, calculable, positive and flavor universal. The Higgs soft mass squared is negative. The phenomenology of these theories differs significantly from the MSSM. We discuss a variety of possible origins for the soft operators and new fields, including models in both four and higher dimensions.
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A color-octet scalar Θ pair-produced via gluons and decaying to quark pairs can account for the CMS excess in equal-mass dijet pairs at 0.95 TeV with a 65 fb cross section for the real case.
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(Pseudo-)Dirac Gravitinos
Scherk-Schwarz breaking yields a Dirac gravitino whose mixing lacks a local N=1 superspace realization in minimal supergravity and whose matter couplings produce standard scalar thresholds plus UV-dependent Dirac fermion masses.
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Octet scalars shaping LHC distributions in 4-jet final states
A color-octet scalar Θ pair-produced via gluons and decaying to quark pairs can account for the CMS excess in equal-mass dijet pairs at 0.95 TeV with a 65 fb cross section for the real case.