Resummation prediction on top quark transverse momentum distribution at large pT

Understand

We study the factorization and resummation of t-channel top quark transverse momentum distribution at large pT in the SM at both the Tevatron and the LHC with soft-collinear effective theory.

• The cross section in the threshold region can be factorized into a convolution of hard, jet and soft functions.
• In particular, we first calculate the NLO soft functions for this process, and give a RG improved cross section by evolving the different functions to a common scale.
• Our results show that the resummation effects increase the NLO results by about 9%-13% and 4%-9% when the top quark pT is larger than 50 and 70 GeV at the Tevatron and the 8 TeV LHC, respectively.