Constraining heavy colored resonances from top-antitop quark events

Abstract

Recent measurements of the top quark charge asymmetry at Tevatron disfavor the existence of flavor universal axigluons and colorons at 2 sigmas. In this letter we explore the possibility to reconcile the data with these models and use the charge asymmetry and the invariant mass distribution of top-antitop quark pair events to constrain the mass and couplings of massive color-octet gauge bosons decaying to top quarks.

Comments: 4 pages, 4 figures. References added, final version to appear in Phys.Rev.D