Phys. Rev. Lett.
103,
202501
(2009)
[5 pages]
High-Resolution Spectroscopy of Λ16N by Electroproduction
F. Cusanno et al.
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F. Cusanno1, G. M. Urciuoli1, A. Acha2, P. Ambrozewicz2, K. A. Aniol3, P. Baturin4, P. Y. Bertin5, H. Benaoum6, K. I. Blomqvist7, W. U. Boeglin2, H. Breuer8, P. Brindza9, P. Bydžovský10, A. Camsonne5, C. C. Chang8, J.-P. Chen9, Seonho Choi11, E. A. Chudakov9, E. Cisbani12, S. Colilli12, L. Coman2, B. J. Craver13, G. De Cataldo14, C. W. de Jager9, R. De Leo14, A. P. Deur13, C. Ferdi5, R. J. Feuerbach9, E. Folts9, R. Fratoni12, S. Frullani12, F. Garibaldi12, O. Gayou15, F. Giuliani12, J. Gomez9, M. Gricia12, J. O. Hansen9, D. Hayes16, D. W. Higinbotham9, T. K. Holmstrom17, C. E. Hyde16,5, H. F. Ibrahim16, M. Iodice18, X. Jiang4, L. J. Kaufman19, K. Kino20, B. Kross9, L. Lagamba14, J. J. LeRose9, R. A. Lindgren13, M. Lucentini12, D. J. Margaziotis3, P. Markowitz2, S. Marrone14, Z. E. Meziani11, K. McCormick4, R. W. Michaels9, D. J. Millener21, T. Miyoshi22, B. Moffit17, P. A. Monaghan15, M. Moteabbed2, C. Muñoz Camacho23, S. Nanda9, E. Nappi14, V. V. Nelyubin13, B. E. Norum13, Y. Okasyasu22, K. D. Paschke19, C. F. Perdrisat17, E. Piasetzky24, V. A. Punjabi25, Y. Qiang15, B. Raue2, P. E. Reimer26, J. Reinhold2, B. Reitz9, R. E. Roche27, V. M. Rodriguez28, A. Saha9, F. Santavenere12, A. J. Sarty29, J. Segal9, A. Shahinyan30, J. Singh13, S. Širca31, R. Snyder13, P. H. Solvignon11, M. Sotona10, R. Subedi32, V. A. Sulkosky17, T. Suzuki22, H. Ueno33, P. E. Ulmer16, P. Veneroni12, E. Voutier34, B. B. Wojtsekhowski9, X. Zheng26, and C. Zorn9 (Jefferson Lab Hall A Collaboration)
1Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Piazzale Aldo Moro 2, I-00185 Rome, Italy
2Florida International University, Miami, Florida 33199, USA
3California State University, Los Angeles, Los Angeles, California 90032, USA
4Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
5Université Blaise Pascal/IN2P3, F-63177 Aubière, France
6Syracuse University, Syracuse, New York 13244, USA
7Universität Mainz, Mainz, Germany
8University of Maryland, College Park, Maryland 20742, USA
9Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
10Nuclear Physics Institute, Řež near Prague, Czech Republic
11Temple University, Philadelphia, Pennsylvania 19122, USA
12Istituto Nazionale di Fisica Nucleare, Sezione di Roma, gruppo collegato Sanità, and Istituto Superiore di Sanità, I-00161 Rome, Italy
13University of Virginia, Charlottesville, Virginia 22904, USA
14Istituto Nazionale di Fisica Nucleare, Sezione di Bari and University of Bari, I-70126 Bari, Italy
15Massachussets Institute of Technology, Cambridge, Massachusetts 02139, USA
16Old Dominion University, Norfolk, Virginia 23508, USA
17College of William and Mary, Williamsburg, Virginia 23187, USA
18Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, I-00146 Rome, Italy
19University of Massachussets Amherst, Amherst, Massachusetts 01003, USA
20Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
21Brookhaven National Laboratory, Upton, New York 11973, USA
22Tohoku University, Sendai, 980-8578, Japan
23CEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette, France
24School of Physics and Astronomy, Sackler Faculty of Exact Science, Tel Aviv University, Tel Aviv 69978, Israel
25Norfolk State University, Norfolk, Virginia 23504, USA
26Argonne National Laboratory, Argonne, Illinois 60439, USA
27Florida State University, Tallahassee, Florida 32306, USA
28University of Houston, Houston, Texas 77204, USA
29St. Mary’s University, Halifax, Nova Scotia, Canada
30Yerevan Physics Institute, Yerevan, Armenia
31Department of Physics, University of Ljubljana, Slovenia
32Kent State University, Kent, Ohio 44242, USA
33Yamagata University, Yamagata 990-8560, Japan
34LPSC, Université Joseph Fourier, CNRS/IN2P3, INPG, F-38026 Grenoble, France
Received 16 October 2008; revised 14 September 2009; published 9 November 2009
An experimental study of the 16O(e,e′K+)Λ16N reaction has been performed at Jefferson Lab. A thin film of falling water was used as a target. This permitted a simultaneous measurement of the p(e,e′K+)Λ,Σ0 exclusive reactions and a precise calibration of the energy scale. A ground-state binding energy of 13.76±0.16 MeV was obtained for Λ16N with better precision than previous measurements on the mirror hypernucleus Λ16O. Precise energies have been determined for peaks arising from a Λ in s and p orbits coupled to the p1/2 and p3/2 hole states of the 15N core nucleus.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.202501
DOI:
10.1103/PhysRevLett.103.202501
PACS:
21.80.+a, 21.60.Cs, 24.50.+g, 25.30.Rw
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