2013/01/08 by Pyungwon Ko, P. Ko, Ko, P.
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1301.1410
To appear in the Proceeding for "Rencontres du Vietnam on the Beyond the Standard Model of Particle Physics"
arxiv created 2013/01/08 · openalex publication_date 2013/01/08 · arxiv updated 2013/01/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The top forward-backward asymmetry (FBA) observed at the Tevatron has been a hot issue in particle physics for the last few years. In this talk, I describe two different approaches for the top FBA at the Tevatron, one in effective field theory (EFT) approach and the other in explicit model for Z'. Within the first approach, I identify a class of models which can accommodate the top FBA when new physics scale is very heavy. Axigluon or t-channel scalar exchanges with flavor dependent couplings can do the job. In the second approach, I show that the chiral couplings of Z' necessarily invites multi Higgs doublets with Z' couplings. Otherwise the top quark becomes massless, which is completely unphysical. Newly introduced multi Higgs doublets also contribute to the top FBA, σtt and the charge asymmetry at the LHC, and there are parameter regions which are compatible with all the observations related with the top quarks.