On the Importance of Three-Body Decays of Vector-Like Quarks
| Autor: | Bautista, Carlos, de Lima, Leonardo, Matheus, Ricardo D., Savoy-Navarro, Aurore |
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| Přispěvatelé: | AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
electroweak interaction
FOS: Physical sciences buildings High Energy Physics - Experiment doublet quark High Energy Physics - Phenomenology High Energy Physics - Experiment (hep-ex) width Higgs model composite High Energy Physics - Phenomenology (hep-ph) pair production [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] |
| Popis: | It is a common feature of vector-like extensions of the electroweak sector to have near degenerate states, such as electroweak doublets. In simplified models, it is usually assumed that these have decay widths saturated by two-body channels. As a consequence, experimental searches can be done focusing on only one of the states of the doublet. Taking as an example case the light exotic electroweak doublet present in the Minimal Composite Higgs Model, we show that including three-body decays in the pair production process makes this separation unfeasible, since both states of the doublet will be present and contribute significantly to the signal. In addition, by recasting present searches in multileptonic channels, with a simplified cut-and-count analysis, a relevant increase in discovery reach or exclusion potential is obtained; this indeed motivates a more detailed analysis. This study shows how an inclusive search strategy, taking into account both the near degeneracy and the presence of three-body decays, will have greater discovery power and be more natural from a model building perspective. Comment: 18 pages, 12 figures |
| Databáze: | OpenAIRE |
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