Experimental status toward the direct lifetime measurement of Hypertriton using the (K-, pi0) reaction at J-PARC

Le résumé fourni par la source

In order to shed light on hypertriton lifetime puzzle, we will measure the hypertriton lifetime in time domain directly as an independent and complementary approach from heavy-ion experiments. We employ the (K$^-$, $\pi^0$) reaction to populate hypertriton using a K$^-$ beam at J-PARC. By detecting a high-energy gamma-ray decaying from $\pi^0$ at forward angle, this reaction can be tagged efficiently. We newly developed PbF$_2$ calorimeter and the performance was evaluated with positron and hadron beams. We found that the energy resolution is $\sigma$/E = 5.0 %/$\sqrt{\rm{E/GeV}}$, which is sufficient for the high-energy gamma-ray tagging in our experiment.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.