Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment
Ekawa, Hiroyuki; Ashikaga, Sakiko; Hasegawa, Shoichi
; Hashimoto, Tadashi
; Hayakawa, Shuhei; Hosomi, Kenji
; Ichikawa, Yudai
; Imai, Kenichi; Kimbara, Shinji*; Nanamura, Takuya; Naruki, Megumi; Sako, Hiroyuki
; Sato, Susumu
; Suzuki, Kazuki; Tamura, Hirokazu; Tanida, Kiyoshi
; Yamamoto, Takeshi
; Yoshida, Junya; 85 of others*
A double-
hypernucleus,
, was observed by the J-PARC E07 collaborationin nuclear emulsions tagged by the
reaction. This event was interpreted as a production and decay of
,
, or
via
capture in
.By assuming the capture in the atomic 3D state, the binding energy of two
hyperons
(
)of these double-
hypernuclei are obtained to be
,
, and
, respectively. Based on the kinematic fitting,
is the most likely explanation for the observed event.