Precise lifetime measurement of H hypernucleus using in-flight HeH reaction

飛行HeH反応を用いたHハイパー核の寿命精密測定

赤石 貴也; 橋本 直   ; 谷田 聖   ; 他35名*

Akaishi, Takaya; Hashimoto, Tadashi; Tanida, Kiyoshi; 35 of others*

We present a new measurement of the H hypernuclear lifetime using in-flight + He H + reaction at the J-PARC hadron facility. We demonstrate, for the first time, the effective selection of the hypernuclear bound state using only the -ray energy decayed from . This opens the possibility for a systematic study of isospin partner hypernuclei through comparison with data from (, ) reaction. As the first application of this method, our result for the H lifetime, , is one of the most precise measurements to date. We are also preparing to measure the lifetime of the hypertriton (H) using the same setup in the near future.