Probing a leptophobic top-colour model with cross section measurements and precise signal and background predictions: a case study
| Popis: | The sensitivity of particle-level fiducial cross section measurements from ATLAS, CMS and LHCb to a leptophobic top-colour model is studied. The model has previously been the subject of resonance searches. Here we compare it directly to state-of-the-art predictions for Standard Model top quark production and also take into account next-to-leading order predictions for the new physics signal. We make use of the CONTUR framework to evaluate the sensitivity of the current measurements, first under the default CONTUR assumption that the measurement and the SM exactly coincide, and then using the full SM theory calculation for $t\bar{t}$ at next-to-leading and next-to-next-to-leading order as the background model. We derive exclusion limits, discuss the differences between these approaches, and compare to the limits from resonance searches by ATLAS and CMS. 20 pages, 5 figures |
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| Jazyk: | English |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c9694405d41b00b0ecb75855e62266b https://hal.archives-ouvertes.fr/hal-03481308 |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....9c9694405d41b00b0ecb75855e62266b |
| Autor: | Altakach, M. M., Butterworth, J. M., Ježo, T., Michael Klasen, Schienbein, I. |
| 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
top: coupling
Nuclear and High Energy Physics p p: scattering CMS new physics higher-order: 2 FOS: Physical sciences Statistical and Nonlinear Physics ATLAS Condensed Matter Physics LHC-B Atomic and Molecular Physics and Optics quantum chromodynamics: correction High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) lepton: coupling: low [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] p p --> top anti-top top: pair production correction: higher-order |
| Zdroj: | INSPIRE-HEP |
| Popis: | The sensitivity of particle-level fiducial cross section measurements from ATLAS, CMS and LHCb to a leptophobic top-colour model is studied. The model has previously been the subject of resonance searches. Here we compare it directly to state-of-the-art predictions for Standard Model top quark production and also take into account next-to-leading order predictions for the new physics signal. We make use of the CONTUR framework to evaluate the sensitivity of the current measurements, first under the default CONTUR assumption that the measurement and the SM exactly coincide, and then using the full SM theory calculation for $t\bar{t}$ at next-to-leading and next-to-next-to-leading order as the background model. We derive exclusion limits, discuss the differences between these approaches, and compare to the limits from resonance searches by ATLAS and CMS. 20 pages, 5 figures |
| Databáze: | OpenAIRE |
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