Phys. Rev. Lett.
94,
192302
(2005)
[5 pages]
Quasielastic 3He(e,e′p)2H Reaction at Q2=1.5 GeV2 for Recoil Momenta up to 1 GeV/c
M. M. Rvachev et al. Jefferson Lab Hall A Collaboration
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M. M. Rvachev1, F. Benmokhtar2,3, E. Penel-Nottaris4, K. A. Aniol5, W. Bertozzi1, W. U. Boeglin6, F. Butaru4, J. R. Calarco7, Z. Chai1, C. C. Chang8, J.-P. Chen9, E. Chudakov9, E. Cisbani10, A. Cochran11, J. Cornejo5, S. Dieterich2, P. Djawotho12, W. Duran5, M. B. Epstein5, J. M. Finn12, K. G. Fissum13, A. Frahi-Amroun3, S. Frullani10, C. Furget4, F. Garibaldi10, O. Gayou12, S. Gilad1, R. Gilman2,9, C. Glashausser2, J.-O. Hansen9, D. W. Higinbotham1,9, A. Hotta14, B. Hu11, M. Iodice10, R. Iomni10, C. W. de Jager9, X. Jiang2, M. K. Jones8,9, J. J. Kelly8, S. Kox4, M. Kuss9, J. M. Laget15, R. De Leo16, J. J. LeRose9, E. Liatard4, R. Lindgren17, N. Liyanage9, R. W. Lourie18, S. Malov2, D. J. Margaziotis5, P. Markowitz6, F. Merchez4, R. Michaels9, J. Mitchell9, J. Mougey4, C. F. Perdrisat12, V. A. Punjabi19, G. Quéméner4, R. D. Ransome2, J.-S. Réal4, R. Roché20, F. Sabatié21, A. Saha9, D. Simon21, S. Strauch2, R. Suleiman1, T. Tamae22, J. A. Templon23, R. Tieulent4, H. Ueno24, P. E. Ulmer21, G. M. Urciuoli10, E. Voutier4, K. Wijesooriya25, and B. Wojtsekhowski9 (Jefferson Lab Hall A Collaboration)
1Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
2Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
3Université des Sciences et de la Technologie, BP 32, El Alia, Bab Ezzouar, 16111 Alger, Algeria
4Laboratoire de Physique Subatomique et de Cosmologie, F-38026 Grenoble, France
5California State University Los Angeles, Los Angeles, California 90032, USA
6Florida International University, Miami, Florida 33199, USA
7University of New Hampshire, Durham, New Hampshire 03824, USA
8University of Maryland, College Park, Maryland 20742, USA
9Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
10INFN, Sezione Sanitá and Istituto Superiore di Sanitá, Laboratorio di Fisica, I-00161 Rome, Italy
11Hampton University, Hampton, Virginia 23668, USA
12College of William and Mary, Williamsburg, Virginia 23187, USA
13University of Lund, Box 118, SE-221 00 Lund, Sweden
14University of Massachusetts, Amherst, Massachusetts 01003, USA
15CEA-Saclay, F-91191 Gif Sur-Yvette CEDEX, France
16INFN, Sezione di Bari and University of Bari, I-70126 Bari, Italy
17University of Virginia, Charlottesville, Virginia 22901, USA
18State University of New York at Stony Brook, Stony Brook, New York 11794, USA
19Norfolk State University, Norfolk, Virginia 23504, USA
20Florida State University, Tallahassee, Florida 32306, USA
21Old Dominion University, Norfolk, Virginia 23529, USA
22Tohoku University, Sendai 980, Japan
23University of Georgia, Athens, Georgia 30602, USA
24Yamagata University, Kojirakawa-machi 1-4-12, Yamagata 990-8560, Japan
25University of Illinois at Urbana Champaign, Urbana, Illinois 61801, USA
Received 10 September 2004; published 20 May 2005
We have studied the quasielastic 3He(e,e′p)2H reaction in perpendicular coplanar kinematics, with the energy and the momentum transferred by the electron fixed at 840 MeV and 1502 MeV/c, respectively. The 3He(e,e′p)2H cross section was measured for missing momenta up to 1000 MeV/c, while the ATL asymmetry was extracted for missing momenta up to 660 MeV/c. For missing momenta up to 150 MeV/c, the cross section is described by variational calculations using modern 3He wave functions. For missing momenta from 150 to 750 MeV/c, strong final-state interaction effects are observed. Near 1000 MeV/c, the experimental cross section is more than an order of magnitude larger than predicted by available theories. The ATL asymmetry displays characteristic features of broken factorization with a structure that is similar to that generated by available models.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.192302
DOI:
10.1103/PhysRevLett.94.192302
PACS:
21.45.+v, 25.30.Dh, 27.10.+h
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