Neutralino and chargino production in U(1)' at the LHC


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Frank M., Selbuz L., TURAN İ.

EUROPEAN PHYSICAL JOURNAL C, cilt.73, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

We examine the production and decay modes of neutralinos and charginos in a softly-broken supersymmetric model with an extra Abelian symmetry U(1)'. We perform the study in a U(1)' model with a secluded sector, where the tension between the electroweak scale and developing a large enough mass for Z' is resolved by incorporating three additional SU(2) singlet fields into the model. Although the chargino sector is the same as in the MSSM, the neutralino sector of the model is very rich: five new fermion fields are added to the neutral sector bring the total neutralino states to nine. We implement the model into standard packages and perform a detailed and systematic analysis of production and decay modes at the LHC, for three different scenarios, consistent with the Higgs data and relic density constraints. We concentrate on final signals (1) 1l + jets+ E-T, (2) 2l + jets + E-T and (3) 3l + 0jets+ E-T, and comment on the case with 0l + jets+ E-T. We discuss backgrounds and indicate how these signals can be observed, and how the model can be distinguished from other supersymmetric model scenarios.