Differential distributions for t-channel single top-quark production and decay at next-to-next-to-leading order in QCD
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.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Shanghai Jiao-Tong Univ., Shanghai (China)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Zhejiang Univ., Hangzhou (China)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1421959
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 11; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NLO Computations; QCD Phenomenology
Citation Formats
Berger, Edmond L., Gao, Jun, and Zhu, Hua Xing. Differential distributions for t-channel single top-quark production and decay at next-to-next-to-leading order in QCD. United States: N. p., 2017.
Web. doi:10.1007/JHEP11(2017)158.
Berger, Edmond L., Gao, Jun, & Zhu, Hua Xing. Differential distributions for t-channel single top-quark production and decay at next-to-next-to-leading order in QCD. United States. https://doi.org/10.1007/JHEP11(2017)158
Berger, Edmond L., Gao, Jun, and Zhu, Hua Xing. Fri .
"Differential distributions for t-channel single top-quark production and decay at next-to-next-to-leading order in QCD". United States. https://doi.org/10.1007/JHEP11(2017)158. https://www.osti.gov/servlets/purl/1421959.
@article{osti_1421959,
title = {Differential distributions for t-channel single top-quark production and decay at next-to-next-to-leading order in QCD},
author = {Berger, Edmond L. and Gao, Jun and Zhu, Hua Xing},
abstractNote = {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.},
doi = {10.1007/JHEP11(2017)158},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2017,
place = {United States},
year = {2017},
month = {11}
}
Web of Science
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