Abstract
We searched for the bound state of the neutron-rich -hypernucleus , using the double charge-exchange reaction at a beam momentum of at J-PARC. A total of was driven onto a target of 3.5- thickness. No event was observed below the bound threshold, i.e., the mass of , in the missing-mass spectrum of the reaction in the angular range. Furthermore, no event was found up to above the bound threshold. We obtained the double-differential cross section spectra of the reaction in the angular range of . An upper limit of 0.56 nb/sr (90% C.L.) was obtained for the production cross section of the hypernucleus bound state. In addition, not only the bound state region, but also the continuum region and part of the quasifree production region of the ) reaction were obtained with high statistics. The present missing-mass spectrum will facilitate the investigation of the -nucleus optical potential for through spectrum shape analysis.
10 More- Received 3 March 2017
DOI:https://doi.org/10.1103/PhysRevC.96.014005
©2017 American Physical Society