The recent developments on the computation of non-resonant corrections to the e+ e- -> W+ W- b bbar cross section in the top-antitop resonance region are reviewed in this talk. Non-resonant production of the final state W+ W- b bbar starts to contribute at NLO in the nonrelativistic power-counting v ~ alpha_s ~ sqrt(alpha_EW). The corrections induced by non-resonant effects reduce the cross section in the top-antitop resonance peak region at a level which is comparable to the expected experimental precision at the future linear collider, and are thus relevant for a high-precision top mass and width determination.
@article{arxiv.1203.0934,
title = {Non-resonant effects in the top-antitop resonance region},
author = {Pedro Ruiz-Femenia},
journal= {arXiv preprint arXiv:1203.0934},
year = {2012}
}
Comments
12 pages, 7 figures. Contribution to the proceedings of the 2011 International Workshop on Future Linear Colliders (LCWS11), Sept. 26-30, Granada, Spain