Resummation prediction on top quark transverse momentum distribution at large pT

Jian Wang, Chong Sheng Li, and Hua Xing Zhu
Phys. Rev. D 87, 034030 – Published 19 February 2013

Abstract

We study the factorization and resummation of t-channel top quark transverse momentum distribution at large pT in the standard model 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 next-to-leading order soft functions for this process, and give a renormalization group improved cross section by evolving the different functions to a common scale. Our results show that the resummation effects increase the next-to-leading order 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. Also, we discuss the scale independence of the cross section analytically, and show how to choose the proper scales at which the perturbative expansion can converge fast.

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  • Received 8 November 2012

DOI:https://doi.org/10.1103/PhysRevD.87.034030

© 2013 American Physical Society

Authors & Affiliations

Jian Wang1, Chong Sheng Li1,2,*, and Hua Xing Zhu1,†

  • 1Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 2Center for High Energy Physics, Peking University, Beijing 100871, China

  • *csli@pku.edu.cn
  • Present address: SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, USA.

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Vol. 87, Iss. 3 — 1 February 2013

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