Differential distributions for t-channel single top-quark production and decay at next-to-next-to-leading order in QCD
Name
13130_2017_Article_7134.pdf
Size
4.43 MB
Format
Adobe PDF
Checksum (MD5)
012e0144ace1cc37591170fedd4418f5
Author(s)
Berger, Edmond L
Gao, Jun
Berger, Edmond L.
Zhu, HuaXing
Date Issued
November 2017
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Berger, Edmond L. et al. "Differential distributions for t-channel single top-quark production and decay at next-to-next-to-leading order in QCD." Journal of High Energy Physics 2017 (November 2017): 158 © 2017 The Author(s)
Version
Final published version
Abstract
We present a detailed phenomenological study of the next-to-next-to-leading order (NNLO) QCD corrections for t-channel single top (anti-)quark production and its semi-leptonic decay at the CERN Large Hadron Collider (LHC). We find the NNLO corrections for the total inclusive rates at the LHC with different center of mass energies are generally smaller than the NLO corrections, indicative of improved convergence. However, they can be large for differential distributions, reaching a level of 10% or more in certain regions of the transverse momentum distributions of the top (anti-)quark and the pseudo-rapidity distributions of the leading jet in the event. In all cases the perturbative hard-scale uncertainties are greatly reduced after the NNLO corrections are included. We also show a comparison of the normalized parton-level distributions to recent data from the 8 TeV measurement of the ATLAS collaboration. The NNLO corrections tend to shift the theoretical predictions closer to the measured transverse momentum distribution of the top (anti)-quark. Importantly, for the LHC at 13 TeV, we present NNLO cross sections in a fiducial volume with decays of the top quark included. Keywords: NLO Computations; QCD Phenomenology
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP11(2017)158
