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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