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  • Observation of the (Λ)(7)He 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

    Physical review letters, 2013-Jan-04, Letnik: 110, Številka: 1
    Journal Article

    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, (Λ)(7)He, 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 (Λ)(7)He 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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