Article

# Precise QCD predictions on top quark pair production mediated by massive color octet vector boson at hadron colliders

European Physical Journal C (Impact Factor: 5.25). 01/2012; 72(11). DOI:10.1140/epjc/s10052-012-2232-6
Source: arXiv

ABSTRACT We present a theoretical framework for systematically calculating
next-to-leading order (NLO) QCD effects to various experimental observables in
models with massive COVB in a model independent way at hadron colliders.
Specifically, we show the numerical results for the NLO QCD corrections to
total cross sections, invariant mass distribution and AFB of top quark pairs
production mediated by a massive COVB in both the fixed scale (top quark mass)
scheme and the dynamical scale (top pair invariant mass) scheme. Our results
show that the NLO QCD calculations in the dynamical scale scheme is more
reasonable than the fixed scheme and the naive estimate of the NLO effects by
simple rescaling of the LO results with the SM NLO K-factor is not appropriate.

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