Search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeV

Search for chargino nearly mass-degenerate with the lightest neutralino is performed with the data collected at a centre-of-mass energy from 189 to 209~GeV by the ALEPH detector at LEP. The analysis uses the detection of an isolated and energetic initial state radiation photon, produced in associati...

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Detalles Bibliográficos
Autores principales: De Filippis, N, Grivaz, J F
Lenguaje:eng
Publicado: 2001
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/531877
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author De Filippis, N
Grivaz, J F
author_facet De Filippis, N
Grivaz, J F
author_sort De Filippis, N
collection CERN
description Search for chargino nearly mass-degenerate with the lightest neutralino is performed with the data collected at a centre-of-mass energy from 189 to 209~GeV by the ALEPH detector at LEP. The analysis uses the detection of an isolated and energetic initial state radiation photon, produced in association with the chargino pair, whose decay products have small visible energy. No evidence of signal is found and lower limits on the chargino mass of 91 and 89~GeV/$c^2$ at 95\% confidence level are derived, for large scalar masses, in gaugino and in higgsino region respectively.
id cern-531877
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
record_format invenio
spelling cern-5318772022-01-27T08:58:14Zhttp://cds.cern.ch/record/531877engDe Filippis, NGrivaz, J FSearch for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeVParticle Physics - ExperimentSearch for chargino nearly mass-degenerate with the lightest neutralino is performed with the data collected at a centre-of-mass energy from 189 to 209~GeV by the ALEPH detector at LEP. The analysis uses the detection of an isolated and energetic initial state radiation photon, produced in association with the chargino pair, whose decay products have small visible energy. No evidence of signal is found and lower limits on the chargino mass of 91 and 89~GeV/$c^2$ at 95\% confidence level are derived, for large scalar masses, in gaugino and in higgsino region respectively.CERN-ALEPH-2001-004oai:cds.cern.ch:5318772001-07-05
spellingShingle Particle Physics - Experiment
De Filippis, N
Grivaz, J F
Search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeV
title Search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeV
title_full Search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeV
title_fullStr Search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeV
title_full_unstemmed Search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeV
title_short Search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209GeV
title_sort search for charginos nearly mass-degenerate with the lightest neutralino $e^+e^-$ collisions up to $\sqrt{s}$ = 209gev
topic Particle Physics - Experiment
url http://cds.cern.ch/record/531877
work_keys_str_mv AT defilippisn searchforcharginosnearlymassdegeneratewiththelightestneutralinoeecollisionsuptosqrts209gev
AT grivazjf searchforcharginosnearlymassdegeneratewiththelightestneutralinoeecollisionsuptosqrts209gev

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