Flipping t tbar asymmetries at the Tevatron and the LHC
Abstract
We show that the charge asymmetry in t tbar production at the LHC, A_C, and the forward-backward asymmetry at the Tevatron, A_FB, are in general not tightly correlated. They can even have opposite signs, if the underlying new physics (NP) model is general enough. We demonstrate this using two examples of NP: a light axigluon, and a vector that is a color octet and electroweak triplet. The small value of A_C measured at the LHC is thus shown not to exclude a NP interpretation of the anomalously large A_FB at the Tevatron. We identify two observables where significant NP effects are still expected at the Tevatron and the LHC, the b bbar production forward-backward asymmetry and spin polarizations of the pair-produced tops and anti-tops.
Keywords
Cite
@article{arxiv.1205.4721,
title = {Flipping t tbar asymmetries at the Tevatron and the LHC},
author = {Jure Drobnak and Jernej F. Kamenik and Jure Zupan},
journal= {arXiv preprint arXiv:1205.4721},
year = {2013}
}
Comments
5 pages, 5 figures