2015/06/30 by Rohini M. Godbole, Gaurav Mendiratta, Saurabh D. Rindani +1
Physics and Astronomy · #Asymmetry #Diquark #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Missing energy #Nuclear physics #Observable #Pair production #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Standard Model (mathematical formulation) #Tevatron #Top quark #hep-ph
paper · pdf · doi:10.1103/physrevd.92.094013
published as Phys. Rev. D 92, 094013 (2015) · 39 pages, 10 figures and 4 tables. To appear in Phys. Rev. D
arxiv created 2015/10/08 · openalex publication_date 2015/11/09 · arxiv updated 2015/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We explore beyond-standard-model (BSM) physics signatures in the l+jets channel of the tt pair production process at the Tevatron and the LHC. We study the effects of BSM physics scenarios on the top-quark polarization and on the kinematics of the decay leptons. To this end, we construct asymmetries using the lepton energy and angular distributions. Further, we find their correlations with the top polarization, net charge asymmetry and top forward-backward asymmetry. We show that when used together, these observables can help discriminate effectively between SM and different BSM scenarios, which can lead to varying degrees of top polarization at the Tevatron as well as the LHC. We use two types of colored mediator models to demonstrate the effectiveness of proposed observables, an s-channel axigluon and a u-channel diquark.