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−, π0) reaction to populate hypertriton using a K− beam at J-PARC. By detecting a high-energy gamma-ray decaying from π0 at forward angle, this reaction can be tagged efficiently. We newly developed PbF2 calorimeter and the performance was evaluated with positron and hadron beams. We found that the energy resolution is σ/E = 5.0 %/√E/GeV, which is sufficient for the high-energy gamma-ray tagging in our experiment.
|Journal||Proceedings of Science|
|Publication status||Published - 2022 May 24|
|Event||22nd Particles and Nuclei International Conference, PANIC 2021 - Virtual, Online, Portugal|
Duration: 2021 Sept 5 → 2021 Sept 10
ASJC Scopus subject areas