Phys. Rev. C
67,
055205
(2003)
[16 pages]
Separation of the longitudinal and transverse cross sections in the 1H(e,e′K+)Λ and 1H(e,e′K+)Σ0 reactions
R. M. Mohring et al.
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R. M. Mohring1, D. Abbott2, A. Ahmidouch3, Ts. A. Amatuni4, P. Ambrozewicz5, T. Angelescu6, C. S. Armstrong7, J. Arrington8, K. Assamagan9, S. Avery9, K. Bailey8, K. Beard9, S. Beedoe10, E. J. Beise1, H. Breuer1, R. Carlini2, J. Cha9, C. C. Chang1, N. Chant1, E. Cisbani11, G. Collins1, W. Cummings8, S. Danagoulian10,2, R. De Leo11, F. Duncan1, J. Dunne2, D. Dutta12, T. Eden9, R. Ent2, L. Eyraud13, L. Ewell1, M. Finn7, T. Fortune14, V. Frolov15, S. Frullani11, C. Furget13, F. Garibaldi11, D. Gaskell16, D. F. Geesaman8, P. Gueye9, K. K. Gustafsson1, J.-O. Hansen8, M. Harvey9, W. Hinton9, E. Hungerford17, M. Iodice11, C. Jackson10, C. Keppel9,2, W. Kim18, K. Kino19, D. Koltenuk14, S. Kox13, L. Kramer20,2, T. Leone21, A. Lung1, D. Mack2, R. Madey9,3, M. Maeda19, S. Majewski2, P. Markowitz20,2, T. Mart22, C. J. Martoff5, D. Meekins7, A. Mihul6, J. Mitchell2, H. Mkrtchyan4, S. Mtingwa10, I. Niculescu9, R. Perrino21, D. Potterveld8, J. W. Price15, B. A. Raue20,2, J.-S. Real13, J. Reinhold8, P. Roos1, T. Saito19, G. Savage9, R. Sawafta10,2, R. Segel12, S. Stepanyan4, P. Stoler15, V. Tadevosian4, L. Tang9,2, L. Teodorescu6, T. Terasawa19, H. Tsubota19, G. M. Urciuoli11, J. Volmer23, W. Vulcan2, T. P. Welch16, R. Williams9, S. Wood2, C. Yan2, and B. Zeidman8
1University of Maryland, College Park, Maryland 20742
2Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606
3Kent State University, Kent, Ohio 44242
4Yerevan Physics Institute, Yerevan, Armenia
5Temple University, Philadelphia, Pennsylvania 19122
6Bucharest University, Bucharest, Romania
7College of William and Mary, Williamsburg, Virginia 23187
8Argonne National Laboratory, Argonne, Illinois 60439
9Hampton University, Hampton, Virginia 23668
10North Carolina A & T State University, Greensboro, North Carolina 27411
11Physics Laboratory, Istituto Superiore di Sanitá and INFN-Sezione Sanitá, Rome, Italy
12Northwestern University, Evanston, Illinois 60201
13ISN, IN2P3-UJF, 38026 Grenoble, France
14University of Pennsylvania, Philadelphia, Pennsylvania 19104
15Rensselaer Polytechnic Institute, Troy, New York 12180
16Oregon State University, Corvallis, Oregon 97331
17University of Houston, Houston, Texas 77204
18Kyungpook National University, Taegu, South Korea
19Tohoku University, Sendai 982, Japan
20Florida International University, Miami, Florida 33199
21INFN, Sezione di Lecce, via Arnesano, 73100 Lecce, Italy
22Jurusan Fisika, FMIPA, Universitas Indonesia, Depok 16424, Indonesia
23Free University, Amsterdam, The Netherlands
Received 5 November 2002; published 19 May 2003
We report measurements of cross sections for the reaction 1H(e,e′K+)Y, for both the Λ and Σ0 hyperon states, at an invariant mass of W=1.84GeV and four-momentum transfers 0.5<Q2<2(GeV/c)2. Data were taken for three values of virtual photon polarization ε, allowing the decomposition of the cross sections into longitudinal and transverse components. The Λ data are a revised analysis of prior work, whereas the Σ0 results have not been previously reported.
© 2003 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.055205
DOI:
10.1103/PhysRevC.67.055205
PACS:
25.30.Rw, 13.60.Le, 13.60.Rj
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