Friday, October 26, 2012

1210.6832 (Michal Czakon et al.)

NNLO corrections to top pair production at hadron colliders: the
quark-gluon reaction
   [PDF]

Michal Czakon, Alexander Mitov
We compute the next-to-next-to-leading order QCD correction to the total inclusive top pair production cross-section in the reaction qg \to t\bar t + X. We find moderate O(1%) correction to central values at both Tevatron and LHC. The scale variation of the cross-section remains unchanged at the Tevatron and is significantly reduced at the LHC. We find that recently introduced approximation based on the high-energy limit of the top pair cross-section significantly deviates from the exact result. The results derived in the present work are included in version 1.4 of the program Top++. Work towards computing the reaction gg\to t\bar t+X is ongoing.
View original: http://arxiv.org/abs/1210.6832

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