Next-to-leading-order QCD and electroweak corrections to WWW production at proton–proton colliders
Abstract: Multiboson-production processes like triple-W-boson production are sensitive to triple and quartic gauge couplings and Higgs boson exchanges. They provide a window to investigate electroweak symmetry breaking and are important processes to test the validity of the Standard Model.
In the given work, next-to-leading-order (NLO) electroweak (EW) and NLO QCD corrections to WWW production in proton–proton collisions have been worked out for integrated and differential cross sections. This has been done in three different and independent ways: a calculation with on-shell, i.e. stable W bosons, a full off-shell calculation with leptonically decaying W bosons, and a calculation in the triple-pole approximation (TPA), which only takes into account the leading pole term in a threefold resonance expansion. Owing to significant quark–photon-induced EW corrections and due to large photon-PDF uncertainties in the past, the impact of different PDF sets including QED corrections is investigated for on-shell WWW production.
For each calculation, the NLO corrections are dominated by QCD corrections and a strong cancellation among the quark–antiquark- and quark–photon-induced EW corrections is observed. The dominant theoretical uncertainty arises from the residual scale dependence. The TPA performs well for integrated cross sections and angular and rapidity distributions. Phase-space regions that are sensitive to off-shell effects and for which the TPA, therefore, is insufficient can be identified based on the results of the TPA calculation alone
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Anmerkungen
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Universität Freiburg, Dissertation, 2019
- Schlagwort
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LHC
Elementarteilchenphysik
Standardmodell
Quantenchromodynamik
Elektroschwache Wechselwirkung
Theoretische Physik
Hochenergiephysik
- Ereignis
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Veröffentlichung
- (wo)
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Freiburg
- (wer)
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Universität
- (wann)
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2020
- Urheber
- Beteiligte Personen und Organisationen
- DOI
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10.6094/UNIFR/154629
- URN
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urn:nbn:de:bsz:25-freidok-1546294
- Rechteinformation
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Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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25.03.2025, 13:43 MEZ
Datenpartner
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Beteiligte
Entstanden
- 2020
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