Scalar-mediated $t\bar t$ forward-backward asymmetry
Abstract
A large forward-backward asymmetry in production, for large invariant mass of the system, has been recently observed by the CDF collaboration. Among the scalar mediated mechanisms that can explain such a large asymmetry, only the t-channel exchange of a color-singlet weak-doublet scalar is consistent with both differential and integrated cross section measurements. Constraints from flavor changing processes dictate a very specific structure for the Yukawa couplings of such a new scalar. No sizable deviation in the differential or integrated production cross section is expected at the LHC.
Keywords
Cite
@article{arxiv.1107.4350,
title = {Scalar-mediated $t\bar t$ forward-backward asymmetry},
author = {Kfir Blum and Yonit Hochberg and Yosef Nir},
journal= {arXiv preprint arXiv:1107.4350},
year = {2015}
}
Comments
22 pages, 1 figure and 2 tables. v2: Corrected Eqs.(50,51,74), adapted Fig.1, Tab.1 and relevant discussions. Extended discussion of top decay and single top