Phys. Rev. C
71,
058201
(2005)
[5 pages]
Exclusive photoproduction of the cascade (Ξ) hyperons
J. W. Price et al. CLAS Collaboration
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J. W. Price1,*, B. M. K. Nefkens1, J. L. Ducote1, J. T. Goetz1, G. Adams31, P. Ambrozewicz10, E. Anciant3, M. Anghinolfi17, B. Asavapibhop23, G. Audit3, T. Auger3, H. Avakian35, H. Bagdasaryan27, J. P. Ball2, S. Barrow11, M. Battaglieri17, K. Beard20, M. Bektasoglu26,27,†, M. Bellis31,4, N. Benmouna13, B. L. Berman13, N. Bianchi16, A. S. Biselli4, S. Boiarinov19, S. Bouchigny18, R. Bradford4, D. Branford9, W. J. Briscoe13, W. K. Brooks35, V. D. Burkert35, C. Butuceanu39, J. R. Calarco24, D. S. Carman26, B. Carnahan5, C. Cetina13, S. Chen11, P. L. Cole15, A. Coleman39, J. Connelly13, D. Cords35,‡, P. Corvisiero17, D. Crabb38, H. Crannell5, J. P. Cummings31, E. De Sanctis16, R. DeVita17, P. V. Degtyarenko35, H. Denizli29, L. Dennis11, K. V. Dharmawardane27, C. Djalali34, G. E. Dodge27, D. Doughty6, P. Dragovitsch11, M. Dugger2, S. Dytman29, O. P. Dzyubak34, M. Eckhause39, H. Egiyan35, K. S. Egiyan40, L. Elouadrhiri6, A. Empl31, P. Eugenio11, L. Farhi3, R. Fatemi38, R. J. Feuerbach35, T. A. Forest27, V. Frolov31, H. Funsten39, S. J. Gaff8, G. Gavalian27, G. P. Gilfoyle33, K. L. Giovanetti20, C. I. O. Gordon14, R. Gothe34, K. Griffioen39, M. Guidal18, M. Guillo34, N. Guler27, L. Guo35, V. Gyurjyan35, C. Hadjidakis18, R. S. Hakobyan5, D. Hancock39, J. Hardie6, D. Heddle6, F. W. Hersman24, K. Hicks26, I. Hleiqawi26, M. Holtrop24, J. Hu31, C. E. Hyde-Wright27, Y. Ilieva13, D. Ireland14, M. M. Ito35, D. Jenkins37, K. Joo7, H. G. Juengst13, J. H. Kelley8, J. Kellie14, M. Khandaker25, K. Y. Kim29, K. Kim21, W. Kim21, A. Klein27, F. J. Klein35, A. V. Klimenko27, M. Klusman31, M. Kossov19, L. H. Kramer10, Y. Kuang39, V. Kubarovsky31, S. E. Kuhn27, J. Kuhn4, J. Lachniet4, J. M. Laget3, J. Langheinrich34, D. Lawrence23, Ji Li31, K. Livingston14, K. Lukashin5,35, W. Major33, J. J. Manak35, C. Marchand3, S. McAleer11, J. W. C. McNabb28, B. A. Mecking35, J. J. Melone14, M. D. Mestayer35, C. A. Meyer4, K. Mikhailov19, M. Mirazita16, R. Miskimen23, L. Morand3, S. A. Morrow3, V. Muccifora16, J. Mueller29, G. S. Mutchler32, J. Napolitano31, R. Nasseripour10, S. O. Nelson8, S. Niccolai18, G. Niculescu20, I. Niculescu20, B. B. Niczyporuk35, R. A. Niyazov35, M. Nozar35, J. T. O'Brien5, G. V. O'Rielly13, M. Osipenko17, A. Ostrovidov11, K. Park21, E. Pasyuk2, G. Peterson23, S. A. Philips13, N. Pivnyuk19, D. Pocanic38, O. Pogorelko19, E. Polli16, S. Pozdniakov19, B. M. Preedom34, Y. Prok38, D. Protopopescu14, L. M. Qin27, B. A. Raue10, G. Riccardi11, G. Ricco17, M. Ripani17, B. G. Ritchie2, F. Ronchetti16, G. Rosner14, P. Rossi16, D. Rowntree22, P. D. Rubin33, F. Sabatié3, K. Sabourov8, C. Salgado25, J. P. Santoro37, M. Sanzone-Arenhovel17, V. Sapunenko17, R. A. Schumacher4, V. S. Serov19, A. Shafi13, Y. G. Sharabian40, J. Shaw23, S. Simionatto13, A. V. Skabelin22, E. S. Smith35, T. Smith24, L. C. Smith38, D. I. Sober5, M. Spraker8, A. Stavinsky19, S. Stepanyan35, B. Stokes11, P. Stoler31, I. I. Strakovsky13, S. Strauch13, M. Taiuti17, S. Taylor32, D. J. Tedeschi34, U. Thoma12, R. Thompson29, A. Tkabladze26, L. Todor33, C. Tur34, M. Ungaro31, M. F. Vineyard36, A. V. Vlassov19, K. Wang38, L. B. Weinstein27, H. Weller8, D. P. Weygand35, M. Williams4, M. Witkowski31, E. Wolin35, M. H. Wood34, A. Yegneswaran35, and J. Yun27 (CLAS Collaboration)
1University of California at Los Angeles, Los Angeles, California 90095-1547
2Arizona State University, Tempe, Arizona 85287-1504
3CEA-Saclay, Service de Physique Nucleaire, DAPNIA-SPhN, Cedex, France
4Carnegie Mellon University, Pittsburgh, Pennslyvania 15213
5Catholic University of America, Washington, D.C. 20064
6Christopher Newport University, Newport News, Virginia 23606
7University of Connecticut, Storrs, Connecticut 06269
8Duke University, Durham, North Carolina 27708-0305
9Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
10Florida International University, Miami, Florida 33199
11Florida State University, Tallahassee, Florida 32306
12Physikalisches Institut der Universität Giessen, D-35392 Giessen, Germany
13The George Washington University, Washington, DC 20052
14University of Glasgow, Glasgow G12 8QQ, United Kingdom
15Idaho State University, Pocatello, Idaho 83209
16INFN, Laboratori Nazionali di Frascati, Frascati, Italy
17INFN, Sezione di Genova, I-16146 Genova, Italy
18Institut de Physique Nucleaire ORSAY, Orsay, France
19Institute of Theoretical and Experimental Physics, Moscow RU-117259, Russia
20James Madison University, Harrisonburg, Virginia 22807
21Kyungpook National University, Daegu 702-701, South Korea
22Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307
23University of Massachusetts, Amherst, Massachusetts 01003
24University of New Hampshire, Durham, New Hampshire 03824-3568
25Norfolk State University, Norfolk, Virginia 23504
26Ohio University, Athens, Ohio 45701
27Old Dominion University, Norfolk, Virginia 23529
28Penn State University, University Park, Pennsylvania 16802
29University of Pittsburgh, Pittsburgh, Pennsylvania 15260
30Universita’ di ROMA III, I-00146 Roma, Italy
31Rensselaer Polytechnic Institute, Troy, New York 12180-3590
32Rice University, Houston, Texas 77005-1892
33University of Richmond, Richmond, Virginia 23173
34University of South Carolina, Columbia, South Carolina 29208
35Thomas Jefferson National Accelerator Laboratory, Newport News, Virginia 23606
36Union College, Schenectady, New York 12308
37Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0435
38University of Virginia, Charlottesville, Virginia 22901
39College of Willliam and Mary, Williamsburg, Virginia 23187-8795
40Yerevan Physics Institute, 375036 Yerevan, Armenia
Received 28 September 2004; published 23 May 2005
We report on the first measurement of exclusive Ξ-(1321) hyperon photoproduction in γp→K+K+Ξ- for 3.2<Eγ<3.9 GeV. The final state is identified by the missing mass in p(γ,K+K+)X measured with the CLAS detector at Jefferson Laboratory. We have detected a significant number of the ground state Ξ-(1321)1/2+ and have estimated the total cross section for its production. We also have strong evidence for the first excited state Ξ-(1530)3/2+. Photoproduction provides a copious source of Ξ's. We discuss the possibilities of a search for the recently proposed Ξ5- and Ξ5+ pentaquarks.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.71.058201
DOI:
10.1103/PhysRevC.71.058201
PACS:
13.60.Rj, 25.20.Lj, 14.20.Jn
*Electronic address: price@physics.ucla.edu †Current address: Sakarya University, Turkey ‡Deceased.
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