Phys. Rev. C
60,
052201(R)
(1999)
[4 pages]
Coherent π0 photoproduction on the deuteron up to 4 GeV
D. G. Meekins et al.
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D. G. Meekins1,2, D. J. Abbott2, A. Ahmidouch3, C. S. Armstrong1, J. Arrington4, K. A. Assamagan5, O. K. Baker2,5, S. P. Barrow6, D. P. Beatty6, D. H. Beck7, S. Y. Beedoe8, E. J. Beise9, J. E. Belz10, C. Bochna7, P. E. Bosted11, E. J. Brash12,17, H. Breuer9, R. V. Cadman7, L. Cardman2, R. D. Carlini2, J. Cha5, N. S. Chant9, G. Collins9, C. Cothran13, W. J. Cummings14, S. Danagoulian8, F. A. Duncan9, J. A. Dunne2, D. Dutta15, T. Eden5, R. Ent2, B. W. Filippone4, T. A. Forest7, H. T. Fortune6, V. V. Frolov16, H. Gao7, D. F. Geesaman14, R. Gilman17, P. L. J. Gueye5, K. K. Gustafsson9, J-O. Hansen14, M. Harvey5, W. Hinton5, R. J. Holt7, H. E. Jackson14, C. E. Keppel2,5, M. A. Khandaker18, E. R. Kinney19, A. Klein20, D. M. Koltenuk6, G. Kumbartzki17, A. F. Lung9, D. J. Mack2, R. Madey3,5, P. Markowitz21, K. W. McFarlane18, R. D. McKeown4, Z-E. Meziani22, M. A. Miller7, J. H. Mitchell2, H. G. Mkrtchyan23, R. M. Mohring9, J. Napolitano16, A. M. Nathan7, G. Niculescu5, I. Niculescu5, T. G. O’Neill14, B. R. Owen7, S. F. Pate24, D. H. Potterveld14, J. W. Price16, G. L. Rakness19, R. D. Ransome17, J. Reinhold14, P. M. Rutt17, C. W. Salgado18, G. Savage5, R. E. Segel15, N. Simicevic7, P. Stoler16, R. Suleiman3, L. Tang2,5, B. P. Terburg7, D. van Westrum19, W. F. Vulcan2, S. E. Williamson7, M. T. Witkowski16, S. A. Wood2, C. Yan2, and B. Zeidman14
1Department of Physics, College of William and Mary, Williamsburg, Virginia 23187
2Physics Division, Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606
3Department of Physics, Kent State University, Kent, Ohio 44242
4Department of Physics, California Institute of Technology, Pasadena, California 91125
5Department of Physics, Hampton University, Hampton, Virginia 23668
6Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104
7Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
8Department of Physics, North Carolina A&T State University, Greensboro, North Carolina 27411
9Department of Physics, University of Maryland, College Park, Maryland 20742
10TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
11Department of Physics, American University, Washington, D.C. 20016
12Department of Physics, University of Regina, Regina, Saskatchewan, Canada S2S 0A2
13Department of Physics, University of Virginia, Charlottesville, Virginia 22901
14Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
15Department of Physics, Northwestern University, Evanston, Illinois 60201
16Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12180
17Department of Physics, Rutgers University, New Brunswick, New Jersey 08903
18Department of Physics, Norfolk State University, Norfolk, Virginia 23504
19Department of Physics, University of Colorado at Boulder, Boulder, Colorado 80309
20Department of Physics, Old Dominion University, Norfolk, Virginia 23504
21Department of Physics, Florida International University, University Park, Florida 33199
22Department of Physics, Temple University, Philadelphia, Pennsylvania 19122
23Yerevan Physics Institute, Yerevan, Armenia
24Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003
Received 18 March 1999; published 27 September 1999
The differential cross section for 2H(γ,d)π0 has been measured at deuteron center-of-mass angles of 90° and 136°. This work reports the first data for this reaction above a photon energy of 1 GeV, and permits a test of the apparent constituent counting rule and reduced nuclear amplitude behavior as observed in elastic ed scattering. Measurements were performed up to a photon energy of 4.0 GeV, and are in good agreement with previous lower energy measurements. Overall, the data are inconsistent with both constituent-counting rule and reduced nuclear amplitude predictions.
© 1999 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.60.052201
DOI:
10.1103/PhysRevC.60.052201
PACS:
25.20.Lj, 24.85.+p, 25.10.+s
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