Top quark pair production at complete NLO accuracy with NNLO+NNLL′ corrections in QCD * * L. L. Yang and X. Wang are supported in part by the National Natural Science Foundation of China (11975030, 11635001, 11575004). X. Wang is also supported in part by the Cluster of Excellence PRISMA+ (project ID 39083149). D. J. S. is supported under the ERC

Michał Czakon,Li Lin Yang,Ioannis Tsinikos,Xing Wang,Andrew S Papanastasiou,Andrea Ferroglia,Davide Pagani,Darren J Scott,Benjamin D Pecjak,Alexander Mitov,Marco Zaro

doi:10.1088/1674-1137/44/8/083104

Abstract

We describe predictions for top quark pair differential distributions at hadron colliders, by combining the next-to-next-to-leading order quantum chromodynamics calculations and next-to-leading order electroweak corrections with double resummation at the next-to-next-to-leading logarithmic accuracy of threshold logarithms and small-mass logarithms. To the best of our knowledge, this is the first study to present such a combination, which incorporates all known perturbative information. Numerical results are presented for the invariant-mass distribution, transverse-momentum distribution, and rapidity distributions.

Highlights

Top quark pair production is one of the most important processes at the Large Hadron Collider (LHC)
We describe predictions for top quark pair differential distributions at hadron colliders, by combining the next-to-next-to-leading order quantum chromodynamics calculations and next-to-leading order electroweak corrections with double resummation at the next-to-next-to-leading logarithmic accuracy of threshold logarithms and smallmass logarithms
In [26], the complete next-to-leading order (NLO) corrections of quantum chromodynamics (QCD) and EW origin were combined with the next-to-next-to-leading order (NNLO) QCD results using the multiplicative approach

Summary

Introduction

Top quark pair production is one of the most important processes at the Large Hadron Collider (LHC). Top quarks produced at the LHC may have energies that are considerably larger than their rest mass mt , because of the large collider energy Such boosted top quarks require dedicated studies beyond the fixed-order calculations because the NNLO results in this regime are sensitive to the choice of factorization and renormalization scales [7]. In [26], the complete next-to-leading order (NLO) corrections of QCD and EW origin were combined with the NNLO QCD results using the multiplicative approach (denoted as QCD×EW in this paper) Their results show that at high transverse momentum, the EW effects can significantly reduce the differential cross section, and they should be considered for the accurate modeling of the spectrum. To the best of our knowledge, this is the first study to perform such a complicated combination of radiative corrections

Matching of various corrections

Numerical results

Summary