Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector

An inclusive search is presented for new physics in events with two isolated leptons (e or μ) having the same electric charge. The data are selected from events collected from pp collisions at √s = 7 TeV by the ATLAS detector and correspond to an integrated luminosity of 34 pb-1. The spectra in dile...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Exactas
Física
hadron-hadron scattering
proton-proton collisions
ATLAS detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78644
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78644
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
proton-proton collisions
ATLAS detector
spellingShingle Ciencias Exactas
Física
hadron-hadron scattering
proton-proton collisions
ATLAS detector
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
hadron-hadron scattering
proton-proton collisions
ATLAS detector
description An inclusive search is presented for new physics in events with two isolated leptons (e or μ) having the same electric charge. The data are selected from events collected from pp collisions at √s = 7 TeV by the ATLAS detector and correspond to an integrated luminosity of 34 pb-1. The spectra in dilepton invariant mass, missing transverse momentum and jet multiplicity are presented and compared to Standard Model predictions. In this event sample, no evidence is found for contributions beyond those of the Standard Model. Limits are set on the cross-section in a fiducial region for new sources of same-sign high-mass dilepton events in the ee, eμ and μμ channels. Four models predicting same-sign dilepton signals are constrained: two descriptions of Majorana neutrinos, a cascade topology similar to supersymmetry or universal extra dimensions, and fourth generation d-type quarks. Assuming a new physics scale of 1 TeV, Majorana neutrinos produced by an efective operator V with masses below 460 GeV are excluded at 95% confidence level. A lower limit of 290 GeV is set at 95% confidence level on the mass of fourth generation d-type quarks.
format Articulo
Articulo
author Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_facet Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_sort Anduaga, Xabier Sebastián
title Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
title_short Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
title_full Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
title_fullStr Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
title_full_unstemmed Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
title_sort inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 tev with the atlas detector
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/78644
work_keys_str_mv AT anduagaxabiersebastian inclusivesearchforsamesigndileptonsignaturesinppcollisionsats7tevwiththeatlasdetector
AT dovamariateresa inclusivesearchforsamesigndileptonsignaturesinppcollisionsats7tevwiththeatlasdetector
AT monticellifernandogabriel inclusivesearchforsamesigndileptonsignaturesinppcollisionsats7tevwiththeatlasdetector
AT tripianamartinfernando inclusivesearchforsamesigndileptonsignaturesinppcollisionsats7tevwiththeatlasdetector
AT theatlascollaboration inclusivesearchforsamesigndileptonsignaturesinppcollisionsats7tevwiththeatlasdetector
bdutipo_str Repositorios
_version_ 1764820486398672896

Ejemplares similares