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Top quark pair production at small transverse momentum in hadronic collisions

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arxiv 1307.2464 v2 pith:FCWHAG2V submitted 2013-07-09 hep-ph

Hai Tao Li , Chong Sheng Li , Ding Yu Shao , Li Lin Yang , Hua Xing Zhu This is my paper · ORCID
classification hep-ph
keywords momentumtransverseformulaorderpairproductionresultsresummation
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We investigate the transverse momentum resummation for top quark pair production at hadron colliders using the soft-collinear effective theory and the heavy-quark effective theory. We derive the factorization formula for $t\bar{t}$ production at small pair transverse momentum, and show in detail the procedure for calculating the key ingredient of the factorization formula: the next-to-leading order soft functions. We compare our numerical results with experimental data and find that they are consistent within theoretical and experimental uncertainties. To verify the correctness of our resummation formula, we expand it to the next-to-leading order and the next-to-next-to-leading order, and compare those expressions with the exact fixed-order results numerically. Finally, using the results of transverse momentum resummation, we discuss the transverse-momentum-dependent forward-backward asymmetry at the Tevatron.

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Forward citations

Cited by 3 Pith papers

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