Search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 TeV with the ATLAS detector

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A generic search for anomalous production of events with at least three charged leptons is presented. The data sample consists of pp collisions at √s = 8 TeV collected in 2012 by the ATLAS experiment at the CERN Large Hadron Collider, and corresponds to an integrated luminosity of 20.3 fb<sup>...

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Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Arduh, Francisco Anuar, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Física
Hadron-Hadron Scattering
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86881
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86881
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
spellingShingle Ciencias Exactas
Física
Hadron-Hadron Scattering
Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
Hadron-Hadron Scattering
description A generic search for anomalous production of events with at least three charged leptons is presented. The data sample consists of pp collisions at √s = 8 TeV collected in 2012 by the ATLAS experiment at the CERN Large Hadron Collider, and corresponds to an integrated luminosity of 20.3 fb<sup>-1</sup>. Events are required to have at least three selected lepton candidates, at least two of which must be electrons or muons, while the third may be a hadronically decaying tau. Selected events are categorized based on their lepton flavour content and signal regions are constructed using several kinematic variables of interest. No significant deviations from Standard Model predictions are observed. Model-independent upper limits on contributions from beyond the Standard Model phenomena are provided for each signal region, along with prescription to re-interpret the limits for any model. Constraints are also placed on models predicting doubly charged Higgs bosons and excited leptons. For doubly charged Higgs bosons decaying to eτ or μτ, lower limits on the mass are set at 400 GeV at 95% confidence level. For excited leptons, constraints are provided as functions of both the mass of the excited state and the compositeness scale Λ, with the strongest mass constraints arising in regions where the mass equals Λ. In such scenarios, lower mass limits are set at 3.0 TeV for excited electrons and muons, 2.5 TeV for excited taus, and 1.6 TeV for every excited-neutrino flavour.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 TeV with the ATLAS detector
title_short Search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 TeV with the ATLAS detector
title_full Search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 TeV with the ATLAS detector
title_fullStr Search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 TeV with the ATLAS detector
title_full_unstemmed Search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 TeV with the ATLAS detector
title_sort search for new phenomena in events with three or more charged leptons in pp collisions at √s = 8 tev with the atlas detector
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86881
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