Observation of the Λ⁷He Hypernucleus by the (e, e'K⁺) Reaction

Nakamura, S. N.; Matsumura, A.; Okayasu, Y.; Seva, T.; Rodriguez, V. M.; Baturin, P.; Yuan, L.; Acha, A.; Ahmidouch, A.; Androic, D.; Asaturyan, A.; Asaturyan, R.; Baker, O. K.; Benmokhtar, F.; Bosted, P.; Carlini, R.; Chen, C.; Christy, M.; Cole, L.; Danagoulian, S.; Daniel, A.; Dharmawardane, V.; Egiyan, K.; Elaasar, M.; Ent, R.; Fenker, H.; Fujii, Y.; Furic, M.; Gan, L.; Gaskell, D.; Gasparian, A.; Gibson, E. F.; Gogami, T.; Gueye, P.; Han, Y.; Hashimoto, O.; Hiyama, E.; Honda, D.; Horn, T.; Hu, B.; Hungerford, Ed V.; Jayalath, C.; Jones, M.; Johnston, K.; Kalantarians, N.; Kanda, H.; Kaneta, M.; Kato, F.; Kato, S.; Kawama, D.; Keppel, C.; Lan, K. J.; Luo, W.; Mack, D.; Maeda, K.; Malace, S.; Margaryan, A.; Marikyan, G.; Markowitz, P.; Maruta, T.; Maruyama, N.; Miyoshi, T.; Mkrtchyan, A.; Mkrtchyan, H.; Nagao, S.; Navasardyan, T.; Niculescu, G.; Niculescu, M.-I.; Nomura, H.; Nonaka, K.; Ohtani, A.; Oyamada, M.; Perez, N.; Petkovic, T.; Randeniya, S.; Reinhold, J.; Roche, J.; Sato, Y.; Segbefia, E. K.; Simicevic, N.; Smith, G.; Song, Y.; Sumihama, M.; Tadevosyan, V.; Takahashi, T.; Tang, L.; Tsukada, K.; Tvaskis, V.; Vulcan, W.; Wells, S.; Wood, S. A.; Yan, C.; Zhamkochyan, S.

doi:10.1103/PhysRevLett.110.012502

Title: Observation of the _Λ⁷He Hypernucleus by the (e, e'K⁺) Reaction

Journal Article · Tue Jan 01 23:00:00 EST 2013 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.110.012502 · OSTI ID:1102633

Nakamura, S. N.; Matsumura, A.; Okayasu, Y.; Seva, T.; Rodriguez, V. M.; Baturin, P.; Yuan, L.; Acha, A.; Ahmidouch, A.; Androic, D.; Asaturyan, A.; Asaturyan, R.; Baker, O. K.; Benmokhtar, F.; Bosted, P.; Carlini, R.; Chen, C.; Christy, M.; Cole, L.; Danagoulian, S. more »

An experiment with a newly developed high-resolution kaon spectrometer and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson Lab. The ground state of a neutron-rich hypernucleus, He_Λ⁷, was observed for the first time with the (e, e'K⁺) reaction with an energy resolution of ~0.6 MeV. This resolution is the best reported to date for hypernuclear reaction spectroscopy. The He_Λ⁷ binding energy supplies the last missing information of the A=7, T=1 hypernuclear isotriplet, providing a new input for the charge symmetry breaking effect of the ΛN potential.

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Sponsoring Organization:: USDOE

OSTI ID:: 1102633

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 110; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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