Polarization and Spin Effects in Neutralino Production and Decay in Supersymmetric Models

1999/09/29 by G. Moortgat-Pick, Gudrid Moortgat‐Pick, S. Hesselbach +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9909549

6 pages, LaTeX, 8 eps figures, uses sprocl.sty which is included; contribution to the proceedings of the International Workshop on Linear Colliders, Sitges, Barcelona, Spain, April 28 - May 5, 1999; reference and acknowledgment added

openalex publication_date 1999/09/29 · arxiv created 1999/10/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study polarization and spin correlation effects in the MSSM and in extended supersymmetric models at an e⁺e^- linear collider with polarized beams. The production of light neutralinos e⁺ e^- --> χ⁰₁ χ⁰₂ and the subsequent decay χ⁰₂ --> χ⁰₁ e⁺ e^- including full spin correlations is compared in three supersymmetric models: MSSM, NMSSM and an E₆-inspired model with an additional U(1)' gauge group. It is shown that polarization and spin effects can lead to a complete different behavior of these models. Finally, the dependence of the cross section and the decay angular distribution on the gaugino mass parameter M₁ for polarized beams is briefly outlined.

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