A New Calculation of the NLO Energy-Energy Correlation Function

Details A New Calculation of the NLO Energy-Energy Correlation Function A New Calculation of the NLO Energy-Energy Correlation Function

1996-03-22

arxiv.org/abs/hep-ph/9603385v1

Z.Phys. C73 (1997) 495-504

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, uuencoded latex with postscript figures included

Scientific paper

We present a new calculation of the $O(\alpha_s^2)$ coefficient of the energy-energy correlation function (EEC) using two different schemes to cancel infrared and collinear poles. The numerical evaluation uses the phase space slicing and the hybrid subtraction method. Both schemes converge with decreasing slicing cut. The results are independent of the scheme for small cuts. For the pure phase space slicing method, the cut must be below $10^{-6}$ to achieve good results. All four approaches agree with each other and confirm the results of Kunszt and Nason and Glover and Sutton, for the latter also with respect to contributions of different colour factors.

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