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

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

2008-10-22

arxiv.org/abs/0810.3921v2

Phys.Rev.D79:075020,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

76 pages, 24 figures, 9 tables

Scientific paper

10.1103/PhysRevD.79.075020

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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