期刊
PHYSICAL REVIEW D
卷 90, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.094009
关键词
-
资金
- National Natural Science Foundation of China [11375013, 11135003]
We study the factorization and resummation of the t (t) over barW(+/-) production at hadron colliders. The cross section in the threshold limit can be factorized into a convolution of hard and soft functions and parton distribution functions with the soft-collinear effective theory. We calculate the next-to-leading order soft function for the associated production of the heavy quark pair and colorless particle, and we perform the resummation calculation with the next-to-next-to-leading logarithm accuracy. Our results show that the resummation effects reduce the dependence of the cross section on the scales significantly and increase the total cross section by 7%-13% compared with NLO QCD results.
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