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R-parity violating signals for chargino production at LEP II

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R-parity violating signals for chargino production at LEP II

dc.contributor.author	De Campos, F.
dc.contributor.author	Éboli, O.J.P.
dc.contributor.author	García Jareño, Miguel Ángel
dc.contributor.author	Furtado Valle, José Wagner
dc.date.accessioned	2015-10-22T12:20:41Z
dc.date.available	2015-10-22T12:20:41Z
dc.date.issued	1999
dc.identifier.uri	http://hdl.handle.net/10550/47876
dc.description.abstract	We study chargino pair production at LEP II in supersymmetric models with spontaneously broken R-parity. We perform signal and background analyses, showing that a large region of the parameter space of these models can be probed through chargino searches at LEP II. In particular, we determine the attainable limits on the chargino mass as a function of the magnitude of the effective bilinear R-parity violation parameter ϵ, demonstrating that LEP II is able to unravel the existence of charginos with masses almost up to its kinematical limit even in the case of R-parity violation. This requires the study of several final state topologies since the usual MSSM chargino signature is recovered as ϵ→0. Moreover, for sufficiently large ϵ values, for which the chargino decay mode χ±→τ±J dominates, we find through a dedicated Monte Carlo analysis that the χ± mass bounds are again very close to the kinematic limit. Our results establish the robustness of the chargino mass limit, in the sense that it is basically model-independent. They also show that LEP II can establish the existence of spontaneous R-parity violation in a large region of parameter space should charginos be produced.
dc.language.iso	eng
dc.relation.ispartof	Nuclear Physics B, 1999, vol. 546, num. 1-2, p. 33-51
dc.rights.uri	info:eu-repo/semantics/openAccess
dc.source	De Campos, F. Éboli, O.J.P. García Jareño, Miguel Ángel Furtado Valle, José Wagner 1999 R-parity violating signals for chargino production at LEP II Nuclear Physics B 546 1-2 33 51
dc.subject	Física
dc.title	R-parity violating signals for chargino production at LEP II
dc.type	info:eu-repo/semantics/article
dc.date.updated	2015-10-22T12:20:41Z
dc.identifier.doi	http://dx.doi.org/10.1016/S0550-3213(99)00032-2
dc.identifier.idgrec	073528