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Neutralino Cascades in the (M+1)SSM

  • U. Ellwanger
  • C. Hugonie
Theoretical physics

Abstract.

In the (M+1)SSM an additional gauge singlet Weyl spinor appears in the neutralino sector. For a large part of the parameter space this approximative eigenstate is the true LSP. Then most sparticle decays proceed via an additional cascade involving the NLSP \(\rightarrow\) LSP transition, where the NLSP is the non-singlet next-to-lightest neutralino. We present a comprehensive list of all processes, which contribute to the NLSP \(\rightarrow\) LSP transition, the partial widths and the total NLSP decay rate. We perform a scan of the parameters of the model compatible with universal soft terms, and find that the NLSP life time can be quite large, leading to macroscopically displaced vertices. Our results imply that the signatures for sparticle production in the (M+1)SSM can be very different from the MSSM, and are important for calculations of the abundance of dark matter in this model.

Keywords

Dark Matter Parameter Space Decay Rate Life Time Comprehensive List 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • U. Ellwanger
    • 1
  • C. Hugonie
    • 1
  1. 1. Laboratoire de Physique Théorique et Hautes Energies, Université de Paris-Sud, F-91400 Orsay, France FR

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