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Full-Text Articles in Physics
Naturalness And Superpartner Masses Or When To Give Up On Weak Scale Supersymmetry, Greg W. Anderson, Diego Castano
Naturalness And Superpartner Masses Or When To Give Up On Weak Scale Supersymmetry, Greg W. Anderson, Diego Castano
Chemistry and Physics Faculty Articles
Superpartner masses cannot be arbitrarily heavy if supersymmetric extensions of the standard model explain the stability of the gauge hierarchy. This ancient and hallowed motivation for weak scale supersymmetry is often quoted, yet no reliable determination of this upper limit on superpartner masses exists. In this paper we compute upper bounds on superpartner masses in the minimal supersymmetric model, and we identify which values of the superpartner masses correspond to the most natural explanation of the hierarchy stability. We compare the most natural value of these masses and their upper limits to the physics reach of current and future colliders. …
Measure Of Fine Tuning, Greg W. Anderson, Diego Castano
Measure Of Fine Tuning, Greg W. Anderson, Diego Castano
Chemistry and Physics Faculty Articles
Fine-tuning criteria are frequently used to place upper limits on the masses of superpartners in supersymmetric extensions of the standard model. However, commonly used prescriptions for quantifying naturalness have some important shortcomings. Motivated by this, we propose new criteria for quantifying fine tuning that can be used to place upper limits on superpartner masses with greater fidelity. In addition, our analysis attempts to make explicit the assumptions implicit in quantifications of naturalness. We apply our criteria to the minimal supersymmetric extension of the standard model, and we find that the scale of supersymmetry breaking can be larger than previous methods …
Challenging Weak-Scale Supersymmetry At Colliders, Greg W. Anderson, Diego Castano
Challenging Weak-Scale Supersymmetry At Colliders, Greg W. Anderson, Diego Castano
Chemistry and Physics Faculty Articles
Experimental searches for supersymmetry are entering a new era. As future experiments explore the mass range above the current lower bounds on superpartner masses, a failure to observe signals of superpartner production will begin to erode the central motivation for supersymmetry at the weak scale. In this article we present a detailed examination of which regions of supersymmetric parameter space are most natural and the extent to which weak-scale supersymmetry becomes unnatural if no superpartners are observed at CERN LEP II, the Fermilab Tevatron, possible upgrades of these machines, and the CERN LHC.