Distinguishing Standard Model Extensions using Monotop Chirality

ORAL

Abstract

Many theories beyond the standard model of particle physics may produce top quarks with a specific chirality, either left-handed (LH) or right-handedness (RH). The handedness can be reflected in several kinematical distributions of the decay products of the top quark. We suggest a ratio of the bottom-quark energy to the top-quark energy, to examine the chirality. Monte Carlo simulations were performed to evaluate what would happen at the LHC if there exists a heavy color-triplet scalar mediator that decays into either a LH or RH top quark along with a dark matter particle. In the hadronic decay mode of the top quark, followed by hadronic decays of the simulation shows that the handedness of the model can be discerned to a high degree of accuracy by studying the shape of the distribution. If new models of particle physics preferentially produce a top quark of a specific chirality then they can be investigated at the LHC, providing a robust test of the standard model.

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Authors

  • Ian Taulli

    Texas A&M University

  • Daniel Marble

    Southern Methodist University, Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA, Choice Research Group, Stephen F. Austin State University (SPS Chapter 6874), University of Florida, University of Notre Dame, Institut Laue-Langevin, Laboratory for Solid State Physics, ETH, Texas State University, Texas A&M University, Tarleton State University

  • Daniel Marble

    Southern Methodist University, Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA, Choice Research Group, Stephen F. Austin State University (SPS Chapter 6874), University of Florida, University of Notre Dame, Institut Laue-Langevin, Laboratory for Solid State Physics, ETH, Texas State University, Texas A&M University, Tarleton State University