The KARMEN anomaly, light neutralinos and type II supernovae

Abstract

The KARMEN experiment observes a time anomaly in events induced by pion decay at rest. This anomaly can be ascribed to the production of a new weakly interacting particle X with mass m_X\sim 34 MeV. We show that a recently proposed identification of the X particle with the lightest neutralino χin the frame work of the MSSM with broken R parity is in contradiction to optical observations of type II supernovae.

6 pages latex, 1 eps figure. Slightly revised (cf. title), matches published version

References in corpus (1)

• A supersymmetric solution to the KARMEN time anomaly

Cited by in corpus (11)

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• Rare meson decays into very light neutralinos
• R-Parity Violation and Light Neutralinos at SHiP and the LHC
• Constraints on Light Magnetic Dipole Dark Matter from the ILC and SN 1987A
• Gravitino cosmology with a very light neutralino
• Measuring a Light Neutralino Mass at the ILC: Testing the MSSM Neutralino Cold Dark Matter Model
• Searching for a Single Photon from Lightest Neutralino Decays in R-parity-violating Supersymmetry at FASER
• Decays of a bino-like particle in the low-mass regime