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...

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Autor principal: Aad, G.
Formato: JOUR
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Hadron-hadron scattering
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n10_p1_Aad
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_11266708_v2011_n10_p1_Aad
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spelling todo:paper_11266708_v2011_n10_p1_Aad2023-10-03T16:06:46Z Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector Aad, G. Hadron-hadron scattering 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 effective 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. Copyright CERN. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n10_p1_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Hadron-hadron scattering
spellingShingle Hadron-hadron scattering
Aad, G.
Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector
topic_facet Hadron-hadron scattering
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 effective 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. Copyright CERN.
format JOUR
author Aad, G.
author_facet Aad, G.
author_sort Aad, G.
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
url http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n10_p1_Aad
work_keys_str_mv AT aadg inclusivesearchforsamesigndileptonsignaturesinppcollisionsats7tevwiththeatlasdetector
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