{"paper":{"title":"Observation of the Helium 7 Lambda hypernucleus by the (e,e'K+) reaction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Acha, A. Ahmidouch, A. Asaturyan, A. Daniel, A. Gasparian, A. Margaryan, A. Matsumura, A. Mkrtchyan, A. Ohtani, B. Hu, C. Chen, C. Jayalath, C. Keppel, C. Yan, D. Androic, D. Gaskell, D. Honda, D. Kawama, D. Mack, Ed V. Hungerford, E. F. Gibson, E. Hiyama, E. K. Segbefia, F. Benmokhtar, F. Kato, G. Marikyan, G. Niculescu, G. Smith, H. Fenker, H. Kanda, H. Mkrtchyan, H. Nomura, J. Reinhold, J. Roche, K. Egiyan, K. J. Lan, K. Johnston, K. Maeda, K. Nonaka, K. Tsukada, L. Cole, L. Gan, L. Tang, L. Yuan, M. Christy, M. Elaasar, M. Furic, M.-I. Niculescu, M. Jones, M. Kaneta, M. Oyamada, M. Sumihama, N. Kalantarians, N. Maruyama, N. Perez, N. Simicevic, O. Hashimoto, O. K. Baker, P. Baturin, P. Bosted, P. Gueye, P. Markowitz, R. Asaturyan, R. Carlini, R. Ent, S. A. Wood, S. Danagoulian, S. Kato, S. Malace, S. Nagao, S. N. Nakamura, S. Randeniya, S. Wells, S. Zhamkochyan (HKS (JLab E01-011) Collaboration), T. Gogami, T. Horn, T. Maruta, T. Miyoshi, T. Navasardyan, T. Petkovic, T. Seva, T. Takahashi, V. Dharmawardane, V. M. Rodriguez, V. Tadevosyan, V. Tvaskis, W. Luo, W. Vulcan, Y. Fujii, Y. Han, Y. Okayasu, Y. Sato, Y. Song","submitted_at":"2012-07-03T04:47:14Z","abstract_excerpt":"An experiment with a newly developed high-resolution kaon spectrometer (HKS) and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson Lab (JLab). The ground state of a neutron-rich hypernucleus, He 7 Lambda, 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 7 Lambda binding energy supplies the last missing information of the A=7, T=1 hypernuclear iso-triplet, providing a new input for the charge symmetry breakin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.0571","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}