Phys. Rev. Lett.
93,
192301
(2004)
[6 pages]
Proton Source Size Measurements in the eA→e′ppX Reaction
A. V. Stavinsky et al. CLAS Collaboration
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A. V. Stavinsky1, K. R. Mikhailov1, R. Lednicky2, A. V. Vlassov1, G. Adams33, P. Ambrozewich12, E. Anciant4, M. Anghinolfi18, B. Asavapibhop24, G. Asryan42, G. Audit4, T. Auger4, H. Avakian37,17, H. Bagdasaryan29, J. P. Ball3, S. Barrow13, V. Batourine22, M. Battaglieri18, K. Beard21, M. Bektasoglu29, M. Bellis33, N. Benmouna15, N. Bianchi17, A. S. Biselli6, S. Boiarinov37,1, B. E. Bonner34, S. Bouchigny20,37, R. Bradford6, D. Branford11, W. K. Brooks37, V. D. Burkert37, C. Butuceanu41, J. R. Calarco26, D. S. Carman28, C. Cetina15, S. Chen13, P. L. Cole19,37, D. Cords37,*, A. Coleman41, P. Corvisiero18, D. Crabb40, J. P. Cummings33, N. Dashyan42, E. De Sanctis17, R. De Vita18, P. V. Degtyarenko37, H. Denizli31, L. Dennis13, A. Deur37, K. V. Dharmawardane29, C. Djalali36, G. E. Dodge29, D. Doughty8,37, P. Dragovitsch13, M. Dugger3, S. Dytman31, O. P. Dzyubak36, H. Egiyan37,41, K. S. Egiyan42, L. Elouadrhiri37,8, A. Empl33, P. Eugenio13, R. Fatemi40, R. G. Fersch41, R. J. Feuerbach37, T. A. Forest29, H. Funsten41, M. Garçon4, G. Gavalian26,42, S. Gilad23, G. P. Gilfoyle35, K. L. Giovanetti21, P. Girard36, C. I. O. Gordon16, R. W. Gothe36, K. Griffioen41, M. Guidal20, M. Guillo36, N. Guler29, L. Guo37, V. Gyurjyan37, C. Hadjidakis20, R. S. Hakobyan7, J. Hardie8,37, D. Heddle8,37, F. W. Hersman26, K. Hicks28, I. Hleiqawi28, M. Holtrop26, J. Hu33, C. E. Hyde-Wright29, D. G. Ireland16, M. M. Ito37, D. Jenkins39, K. Joo9,40, H. G. Juengst15, J. H. Kelley10, J. D. Kellie16, M. Khandaker27, D. H. Kim22, K. Y. Kim31, K. Kim22, M. S. Kim22, W. Kim22, A. Klein29, F. J. Klein7,37, A. V. Klimenko29, M. Klusman33, M. V. Kossov1, L. H. Kramer12,37, V. Kubarovski33, S. E. Kuhn29, J. Kuhn6, J. Lachniet6, J. M. Laget4, J. Langheinrich36, D. Lawrence24, G. A. Leksin1, T. Lee26, Ji Li33, K. Livingston16, K. Lukashin37, J. J. Manak37, C. Marchand4, S. McAleer13, J. W. C. McNabb30, B. A. Mecking37, S. Mehrabyan31, J. J. Melone16, M. D. Mestayer37, C. A. Meyer6, M. Mirazita17, R. Miskimen24, V. Mokeev25, L. Morand4, S. A. Morrow4,20, V. Muccifora17, J. Mueller31, G. S. Mutchler34, J. Napolitano33, R. Nasseripour12, S. O. Nelson10, S. Niccolai20, G. Niculescu21,28, I. Niculescu21,15, B. B. Niczyporuk37, R. A. Niyazov37,29, M. Nozar37, G. V. O'Rielly15, M. Osipenko18,25, A. I. Ostrovidov13, K. Park22, E. Pasyuk3, G. Peterson24, S. A. Philips15, N. A. Pivnyuk1, D. Pocanic40, O. Pogorelko1, E. Polli17, S. Pozdniakov1, B. M. Preedom36, J. W. Price5, Y. Prok40, D. Protopopescu16, L. M. Qin29, B. A. Raue12,37, G. Riccardi13, G. Ricco18, M. Ripani18, B. G. Ritchie3, F. Ronchetti17,32, G. Rosner16, P. Rossi17, D. Rowntree23, P. D. Rubin35, F. Sabatié4,29, K. Sabourov10, C. Salgado27, J. P. Santoro39,37, V. Sapunenko37,18, R. A. Schumacher6, V. S. Serov1, Y. G. Sharabian37,42, J. Shaw24, S. Simionatto15, A. V. Skabelin23, E. S. Smith37, L. C. Smith40, D. I. Sober7, M. Spraker10, S. Stepanyan37,42, S. S. Stepanyan22, B. E. Stokes13, P. Stoler33, I. I. Strakovsky15, M. Taiuti18, S. Taylor34, D. J. Tedeschi36, U. Thoma14,37, R. Thompson31, A. Tkabladze28, L. Todor35, C. Tur36, M. Ungaro9,33, M. F. Vineyard38,35, L. S. Vorobeyev1, K. Wang40, L. B. Weinstein29, H. Weller10, D. P. Weygand37, C. S. Whisnant36, M. Williams6, E. Wolin37, M. H. Wood36, A. Yegneswaran37, J. Yun29, and L. Zana26 (CLAS Collaboration)
1Institute of Theoretical and Experimental Physics, Moscow, 117218, Russia
2Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 18040 Prague 8, Czech Republic
3Arizona State University, Tempe, Arizona 85287-1504, USA
4CEA-Saclay, Service de Physique Nucléaire, F91191 Gif-sur-Yvette, Cedex, France
5University of California at Los Angeles, Los Angeles, California 90095-1547, USA
6Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
7Catholic University of America, Washington, D.C. 20064, USA
8Christopher Newport University, Newport News, Virginia 23606, USA
9University of Connecticut, Storrs, Connecticut 06269, USA
10Duke University, Durham, North Carolina 27708-0305, USA
11Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
12Florida International University, Miami, Florida 33199, USA
13Florida State University, Tallahassee, Florida 32306, USA
14Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany
15The George Washington University, Washington, D.C. 20052, USA
16University of Glasgow, Glasgow G12 8QQ, United Kingdom
17INFN, Laboratori Nazionali di Frascati, Frascati, Italy
18INFN, Sezione di Genova, 16146 Genova, Italy
19Idaho State University, Pocatello, Idaho 83209, USA
20Institut de Physique Nucleaire ORSAY, Orsay, France
21James Madison University, Harrisonburg, Virginia 22807, USA
22Kungpook National University, Taegu 702-701, South Korea
23Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
24University of Massachusetts, Amherst, Massachusetts 01003, USA
25Moscow State University, General Nuclear Physics Institute, 119899 Moscow, Russia
26University of New Hampshire, Durham, New Hampshire 03824-3568, USA
27Norfolk State University, Norfolk, Virginia 23504, USA
28Ohio University, Athens, Ohio 45701, USA
29Old Dominion University, Norfolk, Virginia 23529, USA
30Penn State University, University Park, Pennsylvania 16802, USA
31University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
32Universitá di ROMA III, 00146 Roma, Italy
33Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
34Rice University, Houston, Texas 77005-1892, USA
35University of Richmond, Richmond, Virginia 23173, USA
36University of South Carolina, Columbia, South Carolina 29208, USA
37Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
38Union College, Schenectady, New York 12308, USA
39Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0435, USA
40University of Virginia, Charlottesville, Virginia 22901, USA
41College of William and Mary, Williamsburg, Virginia 23187-8795, USA
42Yerevan Physics Institute, 375036 Yerevan, Armenia
Received 20 May 2004; published 4 November 2004
Two-proton correlations at small relative momentum q were studied in the eA(3He,4He,C,Fe)→e′ppX reaction at E0=4.46 GeV using the CLAS detector at Jefferson Lab. The enhancement of the correlation function at small q was found to be in accordance with theoretical expectations. Sizes of the emission region were extracted, and proved to be dependent on A and on the proton momentum. The size of the two-proton emission region for He was measured in eA reactions for the first time.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.192301
DOI:
10.1103/PhysRevLett.93.192301
PACS:
13.60.Rj, 21.65.+f, 25.10.+s, 25.30.Rw
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