Supersymmetric Photonic Signals at the CERNe+e−Collider LEP in Light Gravitino Models

1996/09/30 by J. Lopez, Jorge L. Lopez, D. V. Nanopoulos +2 · 5 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevlett.77.5168

published as Phys.Rev.Lett.77:5168-5171,1996 · 11 pages, LaTeX, 4 figures (included). Shortened version to appear in Physical Review Letters

arxiv created 1996/11/14 · openalex publication_date 1996/12/23 · arxiv updated 2009/11/30 · openalex created_date 2017/03/16 · openalex updated_date 2026/07/28

Abstract

We explore and contrast the single-photon and diphoton signals expected at the CERN e⁺e^\ensuremath- collider LEP 2 that arise from neutralino-gravitino ( e⁺e^\ensuremath-\ensuremath→\ensuremathχ\stackrel\ifmmode \else \~\fiG\ensuremath→\ensuremathγ+E_miss) and neutralino-neutralino ( e⁺e^\ensuremath-\ensuremath→\ensuremathχ\ensuremathχ\ensuremath→\ensuremathγ\ensuremathγ+E_miss) production in supersymmetric models with a light gravitino. LEP 1 limits imply that one may observe either one, but not both, of these signals at LEP 2, depending on the values of the neutralino and gravitino masses: single photons for m_\ensuremathχ\ensuremath\gtrsimM_Z and m_\stackrel\ifmmode \else \~\fiG\ensuremath\lesssim3\ifmmode×\else\texttimes\fi10^\ensuremath-5eV; diphotons for m_\ensuremathχ\ensuremath\lesssimM_Z and all allowed values of m_\stackrel\ifmmode \else \~\fiG.

Citations

• Experimental Consequences of a Minimal Messenger Model for Supersymmetry Breaking

Cited by

• Single-photon signals at CERN LEP in supersymmetric models with a light gravitino
• Higgs boson decays to neutralinos in low-scale gauge mediation
• Light-gravitino production at hadron colliders
• Low-energy supersymmetry and its phenomenology
• Report of the working group on searches