Phys. Rev. Lett.
98,
262502
(2007)
[6 pages]
Experimental Study of Exclusive 2H(e,e′p)n Reaction Mechanisms at High Q2
K. S. Egiyan et al. CLAS Collaboration
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K. S. Egiyan1,2,*, G. Asryan1, N. Gevorgyan1, K. A. Griffioen3, J. M. Laget2,†, S. E. Kuhn4, G. Adams36, M. J. Amaryan4, P. Ambrozewicz17, M. Anghinolfi23, G. Audit11, H. Avakian2, H. Bagdasaryan1,4, N. Baillie3, J. P. Ball6, N. A. Baltzell39, S. Barrow18, V. Batourine28, M. Battaglieri23, I. Bedlinskiy26, M. Bektasoglu4,‡, M. Bellis36,9, N. Benmouna19, B. L. Berman19, A. S. Biselli16, L. Blaszczyk18, S. Bouchigny24, S. Boiarinov2, R. Bradford9, D. Branford14, W. J. Briscoe19, W. K. Brooks2, S. Bültmann4, V. D. Burkert2, C. Butuceanu3,§, J. R. Calarco32, S. L. Careccia4, D. S. Carman2, A. Cazes39, S. Chen18, P. L. Cole2,21, P. Collins6, P. Coltharp18, D. Cords2,*, P. Corvisiero23, D. Crabb42, V. Crede18, J. P. Cummings36, N. Dashyan1, R. De Masi11, R. De Vita23, E. De Sanctis22, P. V. Degtyarenko2, H. Denizli35, L. Dennis18, A. Deur2, K. V. Dharmawardane4, R. Dickson9, C. Djalali39, G. E. Dodge4, J. Donnelly20, D. Doughty12,2, M. Dugger6, S. Dytman35, O. P. Dzyubak39, H. Egiyan3,2,**, L. El Fassi5, L. Elouadrhiri2, P. Eugenio18, R. Fatemi42, G. Fedotov31, G. Feldman19, R. J. Feuerbach9, R. Fersch3, M. Garçon11, G. Gavalian32,4, G. P. Gilfoyle38, K. L. Giovanetti27, F. X. Girod11, J. T. Goetz7, A. Gonenc17, C. I. O. Gordon20, R. W. Gothe39, M. Guidal24, M. Guillo39, N. Guler4, L. Guo2, V. Gyurjyan2, C. Hadjidakis24, K. Hafidi5, H. Hakobyan1, R. S. Hakobyan10, C. Hanretty18, J. Hardie12,2, F. W. Hersman32, K. Hicks34, I. Hleiqawi34, M. Holtrop32, C. E. Hyde-Wright4, Y. Ilieva19, D. G. Ireland20, B. S. Ishkhanov31, E. L. Isupov31, M. M. Ito2, D. Jenkins41, H. S. Jo24, K. Joo2,13, H. G. Juengst4, N. Kalantarians4, J. D. Kellie20, M. Khandaker33, W. Kim28, A. Klein4, F. J. Klein10, A. V. Klimenko4, M. Kossov26, Z. Krahn9, L. H. Kramer17,2, V. Kubarovsky36, J. Kuhn36,9, S. V. Kuleshov26, J. Lachniet9,4, J. Langheinrich39, D. Lawrence30, Ji Li36, K. Livingston20, H. Y. Lu39, M. MacCormick24, C. Marchand11, N. Markov13, P. Mattione37, S. McAleer18, B. McKinnon20, J. W. C. McNabb9, B. A. Mecking2, S. Mehrabyan35, J. J. Melone20, M. D. Mestayer2, C. A. Meyer9, T. Mibe34, K. Mikhailov26, R. Minehart42, M. Mirazita22, R. Miskimen30, V. Mokeev31, K. Moriya9, S. A. Morrow24,11, M. Moteabbed17, J. Mueller35, E. Munevar19, G. S. Mutchler37, P. Nadel-Turonski19, R. Nasseripour39, S. Niccolai19,24, G. Niculescu34,27, I. Niculescu2,27, B. B. Niczyporuk2, M. R. Niroula4, R. A. Niyazov4,2, M. Nozar2, G. V. O’Rielly19, M. Osipenko23,31, A. I. Ostrovidov18, K. Park28, E. Pasyuk6, C. Paterson20, S. Anefalos Pereira22, J. Pierce42, N. Pivnyuk26, D. Pocanic42, O. Pogorelko26, S. Pozdniakov26, B. M. Preedom39, J. W. Price8, Y. Prok42,††, D. Protopopescu32,20, B. A. Raue17,2, G. Riccardi18, G. Ricco23, M. Ripani23, B. G. Ritchie6, F. Ronchetti22, G. Rosner20, P. Rossi22, F. Sabatié11, J. Salamanca21, C. Salgado33, J. P. Santoro10,2, V. Sapunenko2, R. A. Schumacher9, V. S. Serov26, Y. G. Sharabian2, N. V. Shvedunov31, A. V. Skabelin29, E. S. Smith2, L. C. Smith42, D. I. Sober10, D. Sokhan14, A. Stavinsky26, S. S. Stepanyan28, S. Stepanyan2, B. E. Stokes18, P. Stoler36, S. Strauch19,39, M. Taiuti23, D. J. Tedeschi39, U. Thoma2,25,15,‡‡, A. Tkabladze19, S. Tkachenko4, L. Todor9, C. Tur39, M. Ungaro36,13, M. F. Vineyard40,38, A. V. Vlassov26, D. P. Watts20,‡‡, L. B. Weinstein4, D. P. Weygand2, M. Williams9, E. Wolin2, M. H. Wood39,b, A. Yegneswaran2, L. Zana32, J. Zhang4, B. Zhao13, and Z. W. Zhao39 (CLAS Collaboration)
1Yerevan Physics Institute, 375036 Yerevan, Armenia
2Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
3College of William and Mary, Williamsburg, Virginia 23187-8795, USA
4Old Dominion University, Norfolk, Virginia 23529, USA
5Argonne National Laboratory, Argonne, Illinois 60439, USA
6Arizona State University, Tempe, Arizona 85287-1504, USA
7University of California at Los Angeles, Los Angeles, California 90095-1547, USA
8California State University, Dominguez Hills, Carson, California 90747, USA
9Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
10Catholic University of America, Washington, D.C. 20064, USA
11CEA-Saclay, Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
12Christopher Newport University, Newport News, Virginia 23606, USA
13University of Connecticut, Storrs, Connecticut 06269, USA
14Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
15Emmy-Noether Foundation, Germany
16Fairfield University, Fairfield, Connecticut 06824, USA
17Florida International University, Miami, Florida 33199, USA
18Florida State University, Tallahassee, Florida 32306, USA
19The George Washington University, Washington, D.C. 20052, USA
20University of Glasgow, Glasgow G12 8QQ, United Kingdom
21Idaho State University, Pocatello, Idaho 83209, USA
22INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
23INFN, Sezione di Genova, 16146 Genova, Italy
24Institut de Physique Nucleaire ORSAY, Orsay, France
25Institute für Strahlen und Kernphysik, Universität Bonn, Germany
26Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
27James Madison University, Harrisonburg, Virginia 22807, USA
28Kyungpook National University, Daegu 702-701, South Korea
29Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
30University of Massachusetts, Amherst, Massachusetts 01003, USA
31General Nuclear Physics Institute, Moscow State University, 119899 Moscow, Russia
32University of New Hampshire, Durham, New Hampshire 03824-3568, USA
33Norfolk State University, Norfolk, Virginia 23504, USA
34Ohio University, Athens, Ohio 45701, USA
35University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
36Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
37Rice University, Houston, Texas 77005-1892, USA
38University of Richmond, Richmond, Virginia 23173, USA
39University of South Carolina, Columbia, South Carolina 29208, USA
40Union College, Schenectady, New York 12308, USA
41Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0435, USA
42University of Virginia, Charlottesville, Virginia 22901, USA
Received 9 January 2007; published 27 June 2007
The reaction 2H(e,e′p)n has been studied with full kinematic coverage for photon virtuality 1.75<Q2<5.5 GeV2. Comparisons of experimental data with theory indicate that for very low values of neutron recoil momentum (pn<100 MeV/c) the neutron is primarily a spectator and the reaction can be described by the plane-wave impulse approximation. For 100<pn<750 MeV/c, proton-neutron rescattering dominates the cross section, while Δ production followed by the NΔ→NN transition is the primary contribution at higher momenta.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.262502
DOI:
10.1103/PhysRevLett.98.262502
*Deceased. †laget@jlab.org ‡Present address: Ohio University, Athens, OH 45701, USA. §Present address: University of Regina, Regina, SK S4S0A2, Canada. **Present address: University of New Hampshire, Durham, NH 03824-3568, USA. ††Present address: Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA. ‡‡Present address: Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany. aPresent address: Edinburgh University, Edinburgh EH9 3JZ, United Kingdom. bPresent address: University of Massachusetts, Amherst, MA 01003, USA.
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