Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector

A search for new physics with non-resonant signals in dielectron and dimuon final states in the mass range above 2 TeV is presented. This is the first search for nonresonant signals in dilepton final states at the LHC to use a background estimate from the data. The data, corresponding to an integrat...

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Detalles Bibliográficos
Autores principales: Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Orellana, Gonzalo Enrique, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Exactas
Física
Hadron-Hadron scattering (experiments)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/137674
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-137674
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Hadron-Hadron scattering (experiments)
spellingShingle Ciencias Exactas
Física
Hadron-Hadron scattering (experiments)
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
topic_facet Ciencias Exactas
Física
Hadron-Hadron scattering (experiments)
description A search for new physics with non-resonant signals in dielectron and dimuon final states in the mass range above 2 TeV is presented. This is the first search for nonresonant signals in dilepton final states at the LHC to use a background estimate from the data. The data, corresponding to an integrated luminosity of 139 fb⁻¹, were recorded by the ATLAS experiment in proton-proton collisions at a center-of-mass energy of √s = 13 TeV during Run 2 of the Large Hadron Collider. The benchmark signal signature is a two-quark and two-lepton contact interaction, which would enhance the dilepton event rate at the TeV mass scale. To model the contribution from background processes a functional form is fit to the dilepton invariant-mass spectra in data in a mass region below the region of interest. It is then extrapolated to a high-mass signal region to obtain the expected background there. No significant deviation from the expected background is observed in the data. Upper limits at 95% CL on the number of events and the visible cross-section times branching fraction for processes involving new physics are provided. Observed (expected) 95% CL lower limits on the contact interaction energy scale reach 35.8 (37.6) TeV.
format Articulo
Articulo
author Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alonso, Francisco
title Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
title_short Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
title_full Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
title_fullStr Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
title_full_unstemmed Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector
title_sort search for new non-resonant phenomena in high-mass dilepton final states with the atlas detector
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/137674
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