Towards Wb(b)over-bar + j at NLO with an automatized approach to one-loop computations

被引：0
作者：
Reina, Laura [1 ]
Schutzmeier, Thomas [1 ]
机构：
[1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 09期
基金：
美国国家科学基金会;
关键词：
QCD Phenomenology; NLO Computations; ONE-LOOP CALCULATIONS; QCD CORRECTIONS; W-BOSON; REDUCTION; AMPLITUDES; PP;
D O I：
10.1007/JHEP09(2012)119
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We present results for the O(alpha(s)) virtual corrections to qg -> Wb (b) over barq' obtained with a new automatized approach to the evaluation of one-loop amplitudes in terms of Feynman diagrams. Together with the O(alpha(s)) corrections to q (q) over bar' -> Wb (b) over barg, which can be obtained from our results by crossing symmetry, this represents the bulk of the next-to-leading order virtual QCD corrections to Wb (b) over bar + j and Wb + j hadronic production. calculated in a fixed-flavor scheme with four light flavors. Furthermore, these corrections represent a well defined and independent subset of the 1-loop amplitudes needed for the NNLO calculation of Wb (b) over bar. Our approach was tested against several existing results for NLO amplitudes including selected O(alpha(s)) one-loop corrections to W + 3j hadronic production. We discuss the efficiency of our method both with respect to evaluation time and numerical stability.
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