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

Regular Article - Theoretical Physics

Abstract

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) \(1\ell+\mathit{jets}+\not\! \! E_{T} \), (2) \(2\ell+\mathit{jets}+\not\! \! E_{T} \) and (3) \(3\ell+0\mathit{jets}+\not\! \! E_{T} \), and comment on the case with \(0\ell+\mathit{jets}+\not\! \! E_{T} \). We discuss backgrounds and indicate how these signals can be observed, and how the model can be distinguished from other supersymmetric model scenarios.

Keywords

Dark Matter Higgs Boson Minimal Supersymmetric Standard Model Light Supersymmetric Particle Vacuum Expectation Value 

Notes

Acknowledgements

M.F. would like to thank Benjamin Fuks for many discussions on the topic of chargino and neutralino production. The work of M.F. is supported in part by NSERC under grant number SAP105354. The research of L.S. is supported in part by The Council of Higher Education of Turkey (YOK).

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Copyright information

© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica 2013

Authors and Affiliations

  1. 1.Department of PhysicsConcordia UniversityMontrealCanada
  2. 2.Department of Engineering PhysicsAnkara UniversityAnkaraTurkey
  3. 3.Department of PhysicsMiddle East Technical UniversityAnkaraTurkey

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