Polynomials, Riemann surfaces, and reconstructing missing-energy events
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We consider the problem of reconstructing energies, momenta, and masses in collider events with missing energy, along with the complications introduced by combinatorial ambiguities and measurement errors. Typically, one reconstructs more than one value and we show how the wrong values may be correlated with the right ones. The problem has a natural formulation in terms of the theory of Riemann surfaces. We discuss examples including top quark decays in the Standard Model (relevant for top quark mass measurements and tests of spin correlation), cascade decays in models of new physics containing dark matter candidates, decays of third-generation leptoquarks in composite models of electroweak symmetry breaking, and Higgs boson decay into two τ leptons.
KeywordsHadronic Colliders Beyond Standard Model
- The ATLAS collaboration, Discovery potential of A/H → ττ → lh in ATLAS, Atlas Note ATL-PHYS-PUB-2010-011.
- The CMS collaboration, Towards the search for the standard model Higgs boson produced in vector boson fusion and decaying into a tau pair in CMS with 1 inverse femtobarn: tau identification studies, CMS Note CMS-PAS-HIG-08-001.
- The ATLAS collaboration, Search for neutral MSSM Higgs bosons decaying to τ + τ − pairs in proton-proton collisions at sqrts =7TeV with the ATLAS Experiment, Atlas Note ATLAS-CONF-2011-024.
- The CMS collaboration, Search for neutral Higgs boson production and decay to tau pairs, CMS Note CMS-PAS-HIG-10-002.
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