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Search for R-parity violation with a (U)over-bar(D)over-bar(D)over-bar coupling at root s approximate to 189 GeV

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Search for R-parity violation with a (U)over-bar(D)over-bar(D)over-bar coupling at root s approximate to 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	Oyanguren Campos, Arantza
dc.contributor.author	Perepelitsa, V.
dc.contributor.author	Salt Cairols, José
dc.contributor.author	Tortosa Martínez, Pablo
dc.contributor.author	Higón Rodríguez, Emilio
dc.date.accessioned	2014-03-28T12:53:14Z
dc.date.available	2014-03-28T12:53:14Z
dc.date.issued	2001
dc.identifier.citation	DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Costa, M. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Oyanguren, A. Perepelitsa, V. Salt Cairols, José ,Tortosa Martínez, Pablo, Higón Rodríguez, Emilio 2001 Search for R-parity violation with a (U)over-bar(D)over-bar(D)over-bar coupling at root s approximate to 189 GeV Physics Letters B 500 1-2 22 36
dc.identifier.uri	http://hdl.handle.net/10550/33750
dc.description.abstract	Searches for pair production of gauginos and squarks in e+e- collisions at a centre-of-mass energy of 189 GeV have been performed on data corresponding to an integrated luminosity of 158 pb^{-1} collected by the DELPHI detector at LEP. The data were analyzed under the assumption of non-conservation of R-parity through a single dominant Ubar Dbar Dbar coupling between squarks and quarks. Typical final states contain between 4 and 10 jets with or without additional leptons. No excess of data above Standard Model expectations was observed. The results were used to constrain domains of the MSSM parameter space and derive limits on the masses of supersymmetric particles. The following mass limits at 95% CL were obtained from these searches: neutralino mass: m_{\tilde{\chi^0_{1}}} \geq 32 GeV chargino mass: m_{\tilde{\chi^+_{1}}} \geq 94 GeV stop and sbottom mass (indirect decay) with \Delta M > 5 GeV: m_{\tilde{t_1}} \geq 74 GeV, for \Phi_{mix}=0 rad m_{\tilde{t_1}} \geq 59 GeV, for \Phi_{mix}=0.98 rad m_{\tilde{b_1}} \geq 72 GeV, for \Phi_{mix}=0 rad. The angle \phi_{mix} is the mixing angle between left and right handed quarks.
dc.relation.ispartof	Physics Letters B, 2001, vol. 500, num. 1-2, p. 22-36
dc.subject	Física nuclear
dc.subject	Partícules (Física nuclear)
dc.title	Search for R-parity violation with a (U)over-bar(D)over-bar(D)over-bar coupling at root s approximate to 189 GeV
dc.type	journal article	es_ES
dc.date.updated	2014-03-28T12:53:14Z
dc.identifier.doi	10.1016/S0370-2693(01)00017-X
dc.identifier.idgrec	006728
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1016/S0370-2693(01)00017-X