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

Nakamura, S. N. and Matsumura, A. and Okayasu, Y. and Ševa, Tomislav and Rodriguez, V. M. and Baturin, P. and Yuan, L. and Acha, A. and Ahmidouch, A. and Androić, Darko and Asaturyan, A. and Asaturyan, R. and Baker, O. K. and Benmokhtar, F. and Bosted, P. and Carlini, R. and Chen, C. and Christy, M. and Cole, L. and Danagoulian, S. and Daniel, A. and Dharmawardane, V. and Egiyan, K. and Elaasar, M. and Ent, R. and Fenker, H. and Fujii, Y. and Furić, Miroslav and Gan, L. and Gaskell, D. and Gasparian, A. and Gibson, E. F. and Gogami, T. and Gueye, P. and Han, Y. and Hashimoto, O. and Hiyama, E. and Honda, D. and Horn, T. and Hu, B. and Hungerford, Ed V. and Jayalath, C. and Jones, M. and Johnston, K. and Kalantarians, N. and Kanda, H. and Kaneta, M. and Kato, F. and Kato, S. and Kawama, D. and Keppel, C. and Lan, K. J. and Luo, W. and Mack, D. and Maeda, K. and Malace, S. and Margaryan, A. and Marikyan, G. and Markowitz, P. and Maruta, T. and Maruyama, N. and Miyoshi, T. and Mkrtchyan, A. and Mkrtchyan, H. and Nagao, S. and Navasardyan, T. and Niculescu, G. and Niculescu, M.-I. and Nomura, H. and Nonaka, K. and Ohtani, A. and Oyamada, M. and Perez, N. and Petković, Tomislav and Randeniya, S. and Reinhold, J. and Roche, J. and Sato, Y. and Segbefia, E. K. and Šimičević, Neven and Smith, G. and Song, Y. and Sumihama, M. and Tadevosyan, V. and Takahashi, T. and Tang, L. and Tsukada, K. and Tvaskis, V. and Vulcan, W. and Wells, S. and Wood, S. A. and Yan, C. and Zhamkochyan, S. (HKS (JLab E01-011) Collaboration) (2013) Observation of the Λ7He Hypernucleus by the (e, e′K+) Reaction. Physical Review Letters, 110 (1). pp. 12502-5. ISSN 0031-9007

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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, Λ7He, 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 Λ7He 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.

Item Type: Article
Keywords: high-resolution kaon spectrometer, hypernucleus, hy
Date: January 2013
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2013) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 05 Jun 2014 08:23
Last Modified: 23 Feb 2016 15:30
URI: http://digre.pmf.unizg.hr/id/eprint/2221

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