Result of C(K, p) analysis of the J-PARC E05 pilot run

J-PARC E05実験のC(K, p)の結果報告

佐甲 博之   ; 谷田 聖   ; 長谷川 勝一   ; 佐藤 進  ; 市川 裕大   

Sako, Hiroyuki; Tanida, Kiyoshi; Hasegawa, Shoichi; Sato, Susumu; Ichikawa, Yudai

We have measured a real inclusive missing-mass spectrum of the C(K, p) reactio at the kaon incident momentum of 1.8 GeV/c. This data was taken as a by-product measurement of the J-PARC E05 pilot run, which aim to search for the -hypernuclei by using C(K, K) reaction at J-PARC K1.8 beam line. We have compared the observed missing-mass spectrum with a DWIA calculation to discuss the K-nucleus interaction. In this comparison, we have changed the depth of both real and imaginary part of the optical potential between K and nucleus. It is found that the observed spectrum is well reproduced by the calculation of the potential depth of V0 is about -80 MeV (real part) and W0 is about -40 MeV (imaginary part). On the other hand, we have observed the definitive excess in the deeply bound region BK 100 MeV. This excess cannot be explained by the any optical potential. Then, it can be interpreted as a deeply bound state between (1405) and Be.