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Simplified Models for a First Characterization of New Physics at the LHC

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arxiv 0810.3921 v2 pith:KOO5W6ZB submitted 2008-10-22 hep-ph

Simplified Models for a First Characterization of New Physics at the LHC

classification hep-ph
keywords datamodelssimplifiedcharacterizationfirstfitsmodelphysics
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Low-energy SUSY and several other theories that address the hierarchy problem predict pair-production at the LHC of particles with Standard Model quantum numbers that decay to jets, missing energy, and possibly leptons. If an excess of such events is seen in LHC data, a theoretical framework in which to describe it will be essential to constraining the structure of the new physics. We propose a basis of four deliberately simplified models, each specified by only 2-3 masses and 4-5 branching ratios, for use in a first characterization of data. Fits of these simplified models to the data furnish a quantitative presentation of the jet structure, electroweak decays, and heavy-flavor content of the data, independent of detector effects. These fits, together with plots comparing their predictions to distributions in data, can be used as targets for describing the data within any full theoretical model.

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Cited by 3 Pith papers

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