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Search for charginos nearly mass-degenerate with the lightest neutralino

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Search for charginos nearly mass-degenerate with the lightest neutralino

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dc.contributor.author DELPHI Collaboration
dc.contributor.author Alemany Fernández, Reyes
dc.contributor.author Cabrera Urbán, Susana
dc.contributor.author Castillo Giménez, María Victoria
dc.contributor.author Cortina Gil, Eduardo
dc.contributor.author Ferrer Soria, Antonio
dc.contributor.author Fuster Verdú, Juan A.
dc.contributor.author García García, Carmen
dc.contributor.author Gil Botella, Inés
dc.contributor.author Hernández Rey, Juan José
dc.contributor.author Higón Rodríguez, Emilio
dc.contributor.author Lacasta Llácer, Carlos
dc.contributor.author Martínez Vidal, Fernando
dc.contributor.author Navas Concha, Sergio
dc.contributor.author Salt Cairols, José
dc.date.accessioned 2014-03-29T12:50:57Z
dc.date.available 2014-03-29T12:50:57Z
dc.date.issued 1999
dc.identifier.citation DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Higón Rodríguez, Emilio Lacasta LLacer, Carlos Martínez Vidal, Fernando Navas, S. Salt Cairols, José 1999 Search for charginos nearly mass-degenerate with the lightest neutralino European Physical Journal C 11 1 1 17
dc.identifier.uri http://hdl.handle.net/10550/33806
dc.description.abstract A search for charginos with masses close to the mass of the lightest neutralino is reported, based on the data collected with the DELPHI detector at LEP from 1995 to 1997 at centre-of-mass energies between 130 and 183 GeV. The signature of a photon at high transverse momentum radiated from the initial state reduces the two-photon background to acceptable rates, thus making the mass differences between a few hundred MeV/c^2 and 3 GeV/c^2 detectable. In very nearly degenerate scenarios, the lifetime of the chargino can be large enough to produce either visible secondary vertices or decays outside the detector; therefore, quasi-stable heavy charged particles and displaced decay vertices were also searched for. No excess of events with respect to the Standard Model expectations was observed, and limits in the plane of chargino-neutralino mass difference versus chargino mass are given.
dc.relation.ispartof European Physical Journal C, 1999, vol. 11, num. 1, p. 1-17
dc.subject Física nuclear
dc.subject Partícules (Física nuclear)
dc.title Search for charginos nearly mass-degenerate with the lightest neutralino
dc.type journal article es_ES
dc.date.updated 2014-03-29T12:50:57Z
dc.identifier.doi 10.1007/s100520050610
dc.identifier.idgrec 006686
dc.rights.accessRights open access es_ES
dc.identifier.url 10.1007/s100520050610

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