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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2011
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n10_p1_Aad http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n10_p1_Aad |
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paper:paper_11266708_v2011_n10_p1_Aad2023-06-08T16:08:11Z Inclusive search for same-sign dilepton signatures in pp collisions at √s = 7 TeV with the ATLAS detector 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. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n10_p1_Aad 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 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. |
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 |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n10_p1_Aad http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n10_p1_Aad |
_version_ |
1768541950962565120 |