Precise predictions for electroweak $t\bar{t}$ production at the LHC in models with flavour non-diagonal $Z'$ boson couplings and $W'$ bosons
| Autor: | Mohammad Mahdi Altakach, Jean-Nicolas Lang, T. Jezo, Michael Klasen, I. Schienbein |
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| Přispěvatelé: | Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA) |
| Rok vydání: | 2021 |
| Předmět: |
Hypercharge
Particle physics interference: effect Physics beyond the Standard Model FOS: Physical sciences Parton quantum chromodynamics: correction High Energy Physics - Experiment parton: showers Standard Model High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) Z' [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] numerical calculations Boson Physics Quantum chromodynamics Large Hadron Collider electroweak interaction High Energy Physics::Phenomenology Electroweak interaction higher-order: 1 3. Good health High Energy Physics - Phenomenology CERN LHC Coll [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] High Energy Physics::Experiment W' top: pair production |
| Zdroj: | PoS 40th International Conference on High Energy Physics 40th International Conference on High Energy Physics, Jul 2020, Prague, Czech Republic. pp.315, ⟨10.22323/1.390.0315⟩ |
| Popis: | We report on our re-calculation of electroweak top-quark pair production in Standard Model extensions with extra heavy neutral and charged spin-1 particles at the LHC with substantial improvements. In particular, we allow for flavour--non-diagonal $Z'$ couplings and take into account non-resonant production in the Standard Model and beyond. As in our previous work we include NLO QCD corrections and match to parton showers with the POWHEG method fully taking into account the Standard Model and new physics interference effects. We consider the Sequential Standard Model, the Topcolour model as well as the Third Family Hypercharge Model featuring non-flavour diagonal $Z'$ couplings which has been proposed to explain the anomalies in $B$ decays. Numerical results for $t\bar{t}$ cross sections at hadron colliders with $\sqrt{s}$ of up to 100 TeV are presented. We also investigate the numerical impact of the new non-resonant contributions. Comment: 10 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:2012.14855 |
| Databáze: | OpenAIRE |
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