NLO QCD and electroweak corrections to Z + γ production with leptonic Z-boson decays
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- The next-to-leading-order electroweak corrections to pp→l\(^{+}\)l\(^{-}\)/ν¯¯¯ν+γ+X production, including all off-shell effects of intermediate Z bosons in the complex-mass scheme, are calculated for LHC energies, revealing the typically expected large corrections of tens of percent in the TeV range. Contributions from quark-photon and photon-photon initial states are taken into account as well, but their impact is found to be moderate or small. Moreover, the known next-to-leading-order QCD corrections are reproduced. In order to separate hardThe next-to-leading-order electroweak corrections to pp→l\(^{+}\)l\(^{-}\)/ν¯¯¯ν+γ+X production, including all off-shell effects of intermediate Z bosons in the complex-mass scheme, are calculated for LHC energies, revealing the typically expected large corrections of tens of percent in the TeV range. Contributions from quark-photon and photon-photon initial states are taken into account as well, but their impact is found to be moderate or small. Moreover, the known next-to-leading-order QCD corrections are reproduced. In order to separate hard photons from jets, both a quark-to-photon fragmentation function á la Glover/Morgan and Frixione’s cone isolation are employed. The calculation is available in the form of Monte Carlo programs allowing for the evaluation of arbitrary differential cross sections. Predictions for integrated cross sections are presented for the LHC at 7 TeV, 8 TeV, and 14 TeV, and differential distributions are discussed at 14 TeV for bare muons and dressed leptons. Finally, we consider the impact of anomalous ZZγ and Zγγ couplings.…
Autor(en): | Ansgar Denner, Stefan Dittmaier, Markus Hecht, Christian Pasold |
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URN: | urn:nbn:de:bvb:20-opus-168766 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | JOURNAL OF HIGH ENERGY PHYSICS |
Erscheinungsjahr: | 2016 |
Band / Jahrgang: | 02 |
Heft / Ausgabe: | 057 |
Originalveröffentlichung / Quelle: | JOURNAL OF HIGH ENERGY PHYSICS 02(2016)057. DOI: 10.1007/JHEP02(2016)057 |
DOI: | https://doi.org/10.1007/JHEP02(2016)057 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Freie Schlagwort(e): | LHC; NLO computations; hadronic colliders |
Datum der Freischaltung: | 03.12.2020 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |