Top Polarization and Stop Mixing from Boosted Jet Substructure
arXiv:1211.7261 · doi:10.1007/JHEP03(2013)105
Abstract
Top polarization is an important probe of new physics that couples to the top sector, and which may be discovered at the 14 TeV LHC. Taking the example of the MSSM, we argue that top polarization measurements can put a constraint on the soft supersymmetry breaking parameter A_t. In light of the recent discovery of a Higgs-like boson of mass ~125 GeV, a large A_t is a prediction of many supersymmetric models. To this end, we develop a *detector level* analysis methodology for extracting polarization information from hadronic tops using boosted jet substructure. We show that with 100 fb^(-1) of data, left and right 600 GeV stops can be distinguished to 4σ, and 800 GeV stops can be distinguished to 3σ.
Corresponds to published version
References in corpus (13)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
- PYTHIA 6.4 Physics and Manual
- Herwig++ Physics and Manual
- Top-tagging: A Method for Identifying Boosted Hadronic Tops
- Techniques for improved heavy particle searches with jet substructure
- Minimal Kinematic Constraints and MT2
- Efficient Identification of Boosted Semileptonic Top Quarks at the LHC
- Hadronic top-quark pair production in association with a hard jet at next-to-leading order QCD: Phenomenological studies for the Tevatron and the LHC
- Polarized Tops from Stop Decays at the LHC
- On measurement of top polarization as a probe of production mechanisms at the LHC
- Polarized tops from new physics: signals and observables
- Optimising Stop Naturalness