Phys. Rev. C
76,
025208
(2007)
[11 pages]
Cascade production in the reactions γp→K+K+(X) and γp→K+K+π-(X)
L. Guo et al. CLAS Collaboration
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L. Guo1,*, D. P. Weygand1, M. Battaglieri2, R. De Vita2, V. Kubarovsky3, P. Stoler3, M. J. Amaryan30, P. Ambrozewicz15, M. Anghinolfi2, G. Asryan39, H. Avakian1, H. Bagdasaryan30, N. Baillie38, J. P. Ball5, N. A. Baltzell33, V. Batourine24, M. Battaglieri2, I. Bedlinskiy22, M. Bellis3,8, N. Benmouna17, B. L. Berman17, A. S. Biselli8,14, L. Blaszczyk16, S. Bouchigny21, S. Boiarinov1, R. Bradford8, D. Branford13, W. J. Briscoe17, W. K. Brooks1, S. Bültmann30, V. D. Burkert1, C. Butuceanu38, J. R. Calarco27, S. L. Careccia30, D. S. Carman1, S. Chen16, P. L. Cole19, P. Collins5, P. Coltharp16, D. Crabb37, H. Crannell9, V. Crede16, J. P. Cummings3, N. Dashyan39, R. De Masi10, R. De Vita2, E. De Sanctis20, P. V. Degtyarenko1, A. Deur1, K. V. Dharmawardane30, R. Dickson8, C. Djalali33, G. E. Dodge30, J. Donnelly18, D. Doughty1,11, M. Dugger5, O. P. Dzyubak33, H. Egiyan1,†, K. S. Egiyan39, L. El Fassi4, L. Elouadrhiri1, P. Eugenio16, G. Fedotov26, G. Feldman17, H. Funsten38, M. Garçon10, G. Gavalian27,30, G. P. Gilfoyle32, K. L. Giovanetti23, F. X. Girod10, J. T. Goetz6, A. Gonenc15, C. I. O. Gordon18, R. W. Gothe33, K. A. Griffioen38, M. Guidal21, N. Guler30, V. Gyurjyan1, C. Hadjidakis21, K. Hafidi4, H. Hakobyan39, R. S. Hakobyan9, C. Hanretty16, J. Hardie1,11, F. W. Hersman27, K. Hicks29, I. Hleiqawi29, M. Holtrop27, C. E. Hyde-Wright30, Y. Ilieva17, D. G. Ireland18, B. S. Ishkhanov26, E. L. Isupov26, M. M. Ito1, D. Jenkins36, R. Johnstone18, H. S. Jo21, K. Joo12, H. G. Juengst17,30, N. Kalantarians30, J. D. Kellie18, M. Khandaker28, W. Kim24, A. Klein30, F. J. Klein9, A. V. Klimenko30, M. Kossov22, Z. Krahn8, L. H. Kramer1,15, J. Kuhn8, S. E. Kuhn30, S. V. Kuleshov22, J. Lachniet8,30, J. M. Laget1,10, J. Langheinrich33, D. Lawrence25, T. Lee27, Ji Li3, K. Livingston18, H. Y. Lu33, M. MacCormick21, N. Markov12, P. Mattione31, B. McKinnon18, B. A. Mecking1, J. J. Melone18, M. D. Mestayer1, C. A. Meyer8, T. Mibe29, K. Mikhailov22, R. Minehart37, M. Mirazita20, R. Miskimen25, V. Mokeev26, K. Moriya8, S. A. Morrow10,21, M. Moteabbed15, E. Munevar17, G. S. Mutchler31, P. Nadel-Turonski17, R. Nasseripour15,33, S. Niccolai21, G. Niculescu23, I. Niculescu23, B. B. Niczyporuk1, M. R. Niroula30, R. A. Niyazov1, M. Nozar1,34, M. Osipenko2,26, A. I. Ostrovidov16, K. Park24, E. Pasyuk5, C. Paterson18, S. Anefalos Pereira20, J. Pierce37, N. Pivnyuk22, D. Pocanic37, O. Pogorelko22, S. Pozdniakov22, J. W. Price7, Y. Prok37,‡, D. Protopopescu18, B. A. Raue1,15, G. Riccardi16, G. Ricco2, M. Ripani2, B. G. Ritchie5, F. Ronchetti20, G. Rosner18, P. Rossi20, F. Sabatié10, J. Salamanca19, C. Salgado28, J. P. Santoro1,36,§, V. Sapunenko1, R. A. Schumacher8, V. S. Serov22, Y. G. Sharabian1, D. Sharov26, N. V. Shvedunov26, E. S. Smith1, L. C. Smith37, D. I. Sober9, D. Sokhan13, A. Stavinsky22, S. S. Stepanyan24, S. Stepanyan1, B. E. Stokes16, I. I. Strakovsky17, S. Strauch17,33, M. Taiuti2, D. J. Tedeschi33, U. Thoma1,**, A. Tkabladze17,29, S. Tkachenko30, L. Todor32, C. Tur33, M. Ungaro3,12, M. F. Vineyard35, A. V. Vlassov22, D. P. Watts18,††, L. B. Weinstein30, M. Williams8, E. Wolin1, M. H. Wood33,‡‡, A. Yegneswaran1, L. Zana27, J. Zhang30, B. Zhao12, and Z. W. Zhao33 (CLAS Collaboration)
1Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
2INFN, Sezione di Genova, 16146 Genova, Italy
3Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
4Argonne National Laboratory, Argonne, Illinois 60439, USA
5Arizona State University, Tempe, Arizona 85287-1504, USA
6University of California at Los Angeles, Los Angeles, California 90095-1547, USA
7California State University, Dominguez Hills, Carson, California 90747, USA
8Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
9Catholic University of America, Washington, DC 20064, USA
10CEA-Saclay, Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France
11Christopher Newport University, Newport News, Virginia 23606, USA
12University of Connecticut, Storrs, Connecticut 06269, USA
13Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
14Fairfield University, Fairfield, Connecticut 06824, USA
15Florida International University, Miami, Florida 33199, USA
16Florida State University, Tallahassee, Florida 32306, USA
17The George Washington University, Washington, DC 20052, USA
18University of Glasgow, Glasgow G12 8QQ, United Kingdom
19Idaho State University, Pocatello, Idaho 83209, USA
20INFN, Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
21Institut de Physique Nucleaire ORSAY, Orsay, France
22Institute of Theoretical and Experimental Physics, RU-117259 Moscow, Russia
23James Madison University, Harrisonburg, Virginia 22807, USA
24Kyungpook National University, Daegu 702-701, South Korea
25University of Massachusetts, Amherst, Massachusetts 01003, USA
26Moscow State University, Skobeltsyn Nuclear Physics Institute, RU-119899 Moscow, Russia
27University of New Hampshire, Durham, New Hampshire 03824-3568, USA
28Norfolk State University, Norfolk, Virginia 23504, USA
29Ohio University, Athens, Ohio 45701, USA
30Old Dominion University, Norfolk, Virginia 23529, USA
31Rice University, Houston, Texas 77005-1892, USA
32University of Richmond, Richmond, Virginia 23173, USA
33University of South Carolina, Columbia, South Carolina 29208, USA
34TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
35Union College, Schenectady, New York 12308, USA
36Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0435, USA
37University of Virginia, Charlottesville, Virginia 22901, USA
38College of William and Mary, Williamsburg, Virginia 23187-8795, USA
39Yerevan Physics Institute, 375036 Yerevan, Armenia
Received 8 March 2007; published 14 August 2007
Photoproduction of the cascade resonances has been investigated in the reactions γp→K+K+(X) and γp→K+K+π-(X). The mass splitting of the ground state (Ξ-,Ξ0) doublet is measured to be 5.4±1.8 MeV/c2, consistent with existing measurements. The differential (total) cross sections for the Ξ- have been determined for photon beam energies from 2.75 to 3.85 (4.75) GeV and are consistent with a production mechanism of Y*→K+Ξ- through a t-channel process. The reaction γp→K+K+π-[Ξ0] has also been investigated to search of excited cascade resonances. No significant signal of excited cascade states other than the Ξ-(1530) is observed. The cross-section results of the Ξ-(1530) have also been obtained for photon beam energies from 3.35 to 4.75 GeV.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.76.025208
DOI:
10.1103/PhysRevC.76.025208
PACS:
13.60.Rj, 12.40.Yx, 14.20.Jn, 25.20.Lj
*Corresponding author: lguo@jlab.org †Current address: University of New Hampshire, Durham, New Hampshire 03824-3568, USA. ‡Current address: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA. §Current address: Catholic University of America, Washington, DC 20064, USA. **Current address: Physikalisches Institut der Universitaet Giessen, D-35392 Giessen, Germany. ††Current address: Edinburgh University, Edinburgh EH9 3JZ, United Kingdom. ‡‡Current address: University of Massachusetts, Amherst, Massachusetts 01003, USA.
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