On the NNLO QCD corrections to single-top production at the LHC
We present a fully-differential calculation of the NNLO QCD corrections to the t-channel mechanism for producing single top quarks at the LHC. We work in the structure function approximation, computing QCD corrections to the light- and heavy-quark lines separately and neglecting the dynamical cross-...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2014-09-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269314004808 |
| _version_ | 1818585104896753664 |
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| author | Mathias Brucherseifer Fabrizio Caola Kirill Melnikov |
| author_facet | Mathias Brucherseifer Fabrizio Caola Kirill Melnikov |
| author_sort | Mathias Brucherseifer |
| collection | DOAJ |
| description | We present a fully-differential calculation of the NNLO QCD corrections to the t-channel mechanism for producing single top quarks at the LHC. We work in the structure function approximation, computing QCD corrections to the light- and heavy-quark lines separately and neglecting the dynamical cross-talk between the two. The neglected contribution, which appears at NNLO for the first time, is color-suppressed and is expected to be sub-dominant. Within this approximation, we find that, for the total cross section, NNLO QCD corrections are in the few percent range and, therefore, are comparable to NLO QCD corrections. We also find that the scale independence of the theoretical prediction for single-top production improves significantly once NNLO QCD corrections are included. Furthermore, we show how these results change if a cut on the transverse momentum of the top quark is applied and derive the NNLO QCD prediction for the ratio of single top and single anti-top production cross sections at the 8 TeV LHC. |
| first_indexed | 2024-12-16T08:31:46Z |
| format | Article |
| id | doaj.art-1fcaf0470d8a45199978493bc0f22f45 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-16T08:31:46Z |
| publishDate | 2014-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-1fcaf0470d8a45199978493bc0f22f452022-12-21T22:37:52ZengElsevierPhysics Letters B0370-26931873-24452014-09-01736C586310.1016/j.physletb.2014.06.075On the NNLO QCD corrections to single-top production at the LHCMathias Brucherseifer0Fabrizio Caola1Kirill Melnikov2Institute for Theoretical Particle Physics, Karlsruhe Institute of Technology, Karlsruhe, GermanyDepartment of Physics and Astronomy, Johns Hopkins University, Baltimore, USADepartment of Physics and Astronomy, Johns Hopkins University, Baltimore, USAWe present a fully-differential calculation of the NNLO QCD corrections to the t-channel mechanism for producing single top quarks at the LHC. We work in the structure function approximation, computing QCD corrections to the light- and heavy-quark lines separately and neglecting the dynamical cross-talk between the two. The neglected contribution, which appears at NNLO for the first time, is color-suppressed and is expected to be sub-dominant. Within this approximation, we find that, for the total cross section, NNLO QCD corrections are in the few percent range and, therefore, are comparable to NLO QCD corrections. We also find that the scale independence of the theoretical prediction for single-top production improves significantly once NNLO QCD corrections are included. Furthermore, we show how these results change if a cut on the transverse momentum of the top quark is applied and derive the NNLO QCD prediction for the ratio of single top and single anti-top production cross sections at the 8 TeV LHC.http://www.sciencedirect.com/science/article/pii/S0370269314004808 |
| spellingShingle | Mathias Brucherseifer Fabrizio Caola Kirill Melnikov On the NNLO QCD corrections to single-top production at the LHC Physics Letters B |
| title | On the NNLO QCD corrections to single-top production at the LHC |
| title_full | On the NNLO QCD corrections to single-top production at the LHC |
| title_fullStr | On the NNLO QCD corrections to single-top production at the LHC |
| title_full_unstemmed | On the NNLO QCD corrections to single-top production at the LHC |
| title_short | On the NNLO QCD corrections to single-top production at the LHC |
| title_sort | on the nnlo qcd corrections to single top production at the lhc |
| url | http://www.sciencedirect.com/science/article/pii/S0370269314004808 |
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