Pionic final state interactions and the hypertriton lifetime

Abstract

AbstractWe analyze the contribution of pionic final state interactions (FSI) in the weak decay of the hypertriton. Focusing on the $$^3$$ 3 He channel, we find a contribution of the pionic FSI of the order of $$18\%$$ 18 % . Assuming a fixed value for the branching ratio $$R_3$$ R 3 for the decay width into $$^3$$ 3 He over the decay width into $$^3$$ 3 He and pd final states, we find values for the hypertriton lifetime that are consistent with the world average as well as recent measurements by the ALICE Collaboration.