TY - JOUR
T1 - Study of the nnΛ State and Λ n Interaction at Jefferson Lab
AU - for the JLab Hypernuclear Collaboration
AU - Itabashi, K.
AU - Akiyama, T.
AU - Fujii, Y.
AU - Fujiwara, T.
AU - Garibaldi, F.
AU - Gogami, T.
AU - Kaneta, M.
AU - Katayama, K.
AU - Markowitz, P. E.C.
AU - Maeda, K.
AU - Mizuno, M.
AU - Nagao, S.
AU - Nakamura, Satoshi
AU - Nakamura, Y. R.
AU - Okuyama, K.
AU - Pandey, B.
AU - Reinhold, J.
AU - Suzuki, K. N.
AU - Tang, L.
AU - Toyama, Y.
AU - Toyoda, T.
AU - Uehara, K.
AU - Umezaki, E.
AU - Urciuoli, G. M.
N1 - Funding Information:
This work was supported in part by Aid for Graduate Program on Physics for the Universe. Also, the work was partially supported by JSPS KAKENHI Grants Nos. JP18H05459, 18H01219, 17H01121, 120002001, 15684005, 16GS0201, GP-PU Tohoku Univ., US Department of Energy Contracts Nos. DE-AC05-84ER40150, DE-AC05-06OR23177, DE-FG02-99ER41065, DE-FG02-97ER41047, DE-AC02-06CH11357, DEFG02-00ER41110, DE-AC02-98CH10886, and US NSF Contracts No. 013815 and 0758095
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.
PY - 2022/3
Y1 - 2022/3
N2 - An nnΛ , which consists of two neutrons and a Lambda hyperon, is a multi-baryon system with no charge. Studying the nnΛ state would provide information about the Λ n interaction which has not been directly measured by a scattering experiment. The experiment (E12-17-003) was performed in order to search for the nnΛ state at Jefferson Lab. The nnΛ is expected to be produced by the (e, e′K+) reaction, which has sensitivity to both bound and resonance states if the natural width of the nnΛ is narrow enough to be observed as a peak. The experiment used gas targets of hydrogen and tritium for mass calibration and the nnΛ production, respectively. The mass calibration with H (e, e′K+) Λ / Σ reactions gave the mass resolution of the Λ and Σ each 3.5 MeV / c2 FWHM, for the elementary reaction. A spectrum of 3H (e, e′K+) X was obtained, and a simple model with a Λ n final state interaction was applied to reproduce the spectrum.
AB - An nnΛ , which consists of two neutrons and a Lambda hyperon, is a multi-baryon system with no charge. Studying the nnΛ state would provide information about the Λ n interaction which has not been directly measured by a scattering experiment. The experiment (E12-17-003) was performed in order to search for the nnΛ state at Jefferson Lab. The nnΛ is expected to be produced by the (e, e′K+) reaction, which has sensitivity to both bound and resonance states if the natural width of the nnΛ is narrow enough to be observed as a peak. The experiment used gas targets of hydrogen and tritium for mass calibration and the nnΛ production, respectively. The mass calibration with H (e, e′K+) Λ / Σ reactions gave the mass resolution of the Λ and Σ each 3.5 MeV / c2 FWHM, for the elementary reaction. A spectrum of 3H (e, e′K+) X was obtained, and a simple model with a Λ n final state interaction was applied to reproduce the spectrum.
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U2 - 10.1007/s00601-021-01717-x
DO - 10.1007/s00601-021-01717-x
M3 - Article
AN - SCOPUS:85122668055
SN - 0177-7963
VL - 63
JO - Few-Body Systems
JF - Few-Body Systems
IS - 1
M1 - 16
ER -