Title
Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment
Document Type
Article
Publication Date
2-1-2019
Keywords
D14
Abstract
© 2019 The Author(s). Published by Oxford University Press on behalf of the Physical Society of Japan. A double-Λ hypernucleus, ΛΛ Be, was observed by the J-PARC E07 Collaboration in nuclear emulsions tagged by the (K-, K+) reaction. This event was interpreted as the production and decay of _ΛΛ;10 Be, ΛΛ;11 Be, or ΛΛ;12 Be∗ via Xi- capture in 16 O. By assuming capture in the atomic 3D state, the binding energies of two Λ hyperons (B_ΛΛ) of these double-Λ hypernuclei are obtained to be 15.05 pm 0.11,mathrmMeV, 19.07 pm 0.11,mathrmMeV, and 13.68 pm 0.11,mathrmMeV, respectively. Based on the kinematic fitting, ΛΛ;11 Be is the most likely explanation for the observed event.
Recommended Citation
Ekawa, H.; Agari, K.; Ahn, J. K.; Akaishi, T.; Akazawa, Y.; Ashikaga, S.; Bassalleck, B.; Bleser, S.; Endo, Y.; Fujikawa, Y.; Fujioka, N.; Fujita, M.; Goto, R.; Han, Y.; Hasegawa, S.; Hashimoto, T.; Hayakawa, S. H.; Hayakawa, T.; Hayata, E.; Hicks, K.; Hirose, E.; Hirose, M.; Honda, R.; Hoshino, K.; Hoshino, S.; Hosomi, K.; Hwang, S. H.; Ichikawa, Y.; Ichikawa, M.; Ieiri, M.; Imai, K.; and Inaba, K., "Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment" (2019). Physics & Astronomy Open Access Publications. 50.
https://ohioopen.library.ohio.edu/physics-astronomy-oapub/50