6533b870fe1ef96bd12cf7b8

RESEARCH PRODUCT

Observation of Coulomb-assisted nuclear bound state of $\Xi^-$-$^{14}$N system

S. H. HayakawaK. AgariJ. K. AhnT. AkaishiY. AkazawaS. AshikagaB. BassalleckS. BleserH. EkawaY. EndoY. FujikawaN. FujiokaM. FujitaR. GotoY. HanS. HasegawaT. HashimotoT. HayakawaE. HayataK. HicksE. HiroseM. HiroseR. HondaK. HoshinoS. HoshinoK. HosomiS. H. HwangY. IchikawaM. IchikawaK. ImaiK. InabaY. IshikawaH. ItoK. ItoW. S. JungS. KanatsukiH. KanauchiA. KasagiT. KawaiM. H. KimS. H. KimS. KinbaraR. KiuchiH. KobayashiK. KobayashiT. KoikeA. KoshikawaJ. Y. LeeT. L. MaS. Y. MatsumotoM. MinakawaK. MiwaA. T. MoeT. J. MoonM. MoritsuY. NagaseY. NakadaM. NakagawaD. NakashimaK. NakazawaT. NanamuraM. NarukiA. N. L. NyawY. OguraM. OhashiK. OueS. OzawaJ. PochodzallaS. Y. RyuH. SakoS. SatoY. SatoF. SchuppK. ShirotoriM. M. SoeM. K. SoeJ. Y. SohnH. SugimuraK. N. SuzukiH. TakahashiT. TakahashiT. TakedaH. TamuraK. TanidaA. M. M. TheintK. T. TintY. ToyamaM. UkaiE. UmezakiT. WatabeK. WatanabeT. O. YamamotoS. B. YangC. S. YoonJ. YoshidaM. YoshimotoD. H. ZhangZ. Zhang

subject

Nuclear ExperimentNuclear Experiment

description

In an emulsion-counter hybrid experiment performed at J-PARC, a $\Xi^-$ absorption event was observed which decayed into twin single-$\Lambda$ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as $\Xi^{-} + ^{14}$N$\ \rightarrow\ ^{10}_\Lambda$Be + $^5_\Lambda$He. For the binding energy of the $\Xi^{-}$ hyperon in the $\Xi^-$-$^{14}$N system a value of $1.27 \pm 0.21$ MeV was deduced. The energy level of $\Xi^-$ is likely a nuclear $1p$ state which indicates a weak ${\Xi}N$-$\Lambda\Lambda$ coupling.

yearjournalcountryeditionlanguage
2020-10-27
10.1103/physrevlett.126.062501http://arxiv.org/abs/2010.14317