The KARMEN anomaly, light neutralinos and type II supernovae
M. Kachelriess
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 mX 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.
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