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Search for SUSY with R-parity violating LL(E)over-bar couplings at root s=189 GeV

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Search for SUSY with R-parity violating LL(E)over-bar couplings at root s=189 GeV

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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	Costa Mezquita, María José
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	Oyanguren Campos, Arantza
dc.contributor.author	Salt Cairols, José
dc.contributor.author	Tortosa Martínez, Pablo
dc.date.accessioned	2014-03-28T13:19:30Z
dc.date.available	2014-03-28T13:19:30Z
dc.date.issued	2000
dc.identifier.citation	DELPHI Collaboration Alemany, R. Cabrera, S. Castillo Giménez, María Victoria Cortina, E. Costa, M. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Higón Rodríguez, Emilio Oyanguren Campos, Arantza Salt Cairols, José ,Tortosa Martínez, Pablo, 2000 Search for SUSY with R-parity violating LL(E)over-bar couplings at root s=189 GeV Physics Letters B 487 1-2 36 52
dc.identifier.uri	http://hdl.handle.net/10550/33760
dc.description.abstract	Searches for pair production of supersymmetric particles under the assumption that R-parity is not conserved are presented, based on data recorded by the DELPHI detector in 1998 from e+e- collisions at a centre-of-mass energy of 189 GeV. Only one R-parity violating LL\bar{E} term (i.e. one lambda coupling), which couples scalar leptons to leptons, is considered to be dominant at a time. Moreover, it is assumed that the strength of the R-parity violating couplings is such that the lifetimes can be neglected. The search for pair production of neutralinos, charginos and sleptons has been performed for both direct R-parity violating decays and indirect cascade decays. The results are in agreement with Standard Model expectations, and are used to update the constraints on the MSSM parameter values and the mass limits previously derived at sqrt(s) = 183 GeV. The present 95% C.L. limits on supersymmetric particle masses are: m_{\tilde{\chi}^0} > 30 GeV/c^2 and m_{\tilde{\chi}^\pm} > 94 GeV/c^2; m_{\tilde{\nu}} > 76.5 GeV/c^2 (direct and indirect decays); m_{\tilde{\ell}_R} > 83 GeV/c^2 (indirect decay only).
dc.relation.ispartof	Physics Letters B, 2000, vol. 487, num. 1-2, p. 36-52
dc.subject	Física nuclear
dc.subject	Partícules (Física nuclear)
dc.title	Search for SUSY with R-parity violating LL(E)over-bar couplings at root s=189 GeV
dc.type	journal article	es_ES
dc.date.updated	2014-03-28T13:19:30Z
dc.identifier.doi	10.1016/S0370-2693(00)00776-0
dc.identifier.idgrec	006711
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1016/S0370-2693(00)00776-0