Observing the top energy asymmetry at the LHC
The top-antitop energy asymmetry is a promising observable of the charge asymmetry in jet-associated top-quark pair production at the LHC. We present new predictions of the energy asymmetry in proton-proton collisions at 13 TeV, including QCD corrections at the next-to-leading perturbative order. Th...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
30 January 2017
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| In: |
Physical review
Year: 2017, Jahrgang: 95, Heft: 1 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.95.014035 |
| Online-Zugang: | Verlag, Pay-per-use, Volltext: http://dx.doi.org/10.1103/PhysRevD.95.014035 Verlag, Pay-per-use, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.95.014035 
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| Verfasserangaben: | S. Berge and S. Westhoff |
| Zusammenfassung: | The top-antitop energy asymmetry is a promising observable of the charge asymmetry in jet-associated top-quark pair production at the LHC. We present new predictions of the energy asymmetry in proton-proton collisions at 13 TeV, including QCD corrections at the next-to-leading perturbative order. The effect of QCD corrections on the observable is moderate. With suitable phase-space cuts, the asymmetry can be enhanced at the cost of reducing the cross section. For instance, for a cross section of 1 pb after cuts, we predict an energy asymmetry of −6.5+0.1−0.2% at the next-to-leading order in QCD. We also investigate scale uncertainties and parton-shower effects, which partially cancel in the normalized asymmetry. Our results provide a sound basis for a measurement of the energy asymmetry at the LHC during run II. |
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| Beschreibung: | Gesehen am 24.05.2017 |
| Beschreibung: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.95.014035 |