PIRSA:11120063

Very Light Axigluons and the Top Asymmetry

Krnjaic, G. (2011). Very Light Axigluons and the Top Asymmetry. Perimeter Institute. https://pirsa.org/11120063

Krnjaic, Gordan. Very Light Axigluons and the Top Asymmetry. Perimeter Institute, Dec. 12, 2011, https://pirsa.org/11120063 

          @misc{ pirsa_PIRSA:11120063,
            doi = {10.48660/11120063},
            url = {https://pirsa.org/11120063},
            author = {Krnjaic, Gordan},
            keywords = {Particle Physics},
            language = {en},
            title = {Very Light Axigluons and the Top Asymmetry},
            publisher = {Perimeter Institute},
            year = {2011},
            month = {dec},
            note = {PIRSA:11120063 see, \url{https://pirsa.org}}
          }

Gordan Krnjaic University of Chicago

DOI 10.48660/11120063
Collection
Talk Type Scientific Series
Subject

Abstract

Both Tevatron experiments have recently reported an anomalous forward-backward asymmetry in top-antitop production. Their inclusive results are roughly 3 standard deviations larger than the standard model prediction and may be evidence of new physics that couples to the top quark. In this talk, I will present a weakly-coupled light axigluon model (< Mtop) with flavor universal couplings as a possible explanation. Surprisingly,a particle with these properties can generate a large ttbar asymmetry with model-parameters safe from dijet resonance searches, flavor changing neutral currents, and constraints from the Z pole.