Phys. Rev. Lett.
87,
102302
(2001)
[4 pages]
Measurement of the High Energy Two-Body Deuteron Photodisintegration Differential Cross Section
E. C. Schulte et al.
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E. C. Schulte1, A. Ahmidouch2, C. S. Armstrong3, J. Arrington4, R. Asaturyan5, S. Avery6, O. K. Baker3,6, D. H. Beck1, H. P. Blok7, C. W. Bochna1, W. Boeglin8, P. Y. Bosted9, M. Bouwhuis1, H. Breuer10, D. S. Brown10, A. Bruell11, R. V. Cadman1, R. Carlini3, N. S. Chant10, A. Cochran6, L. Cole6, S. Danagoulian2,3, D. B. Day12, J. A. Dunne13, D. Dutta11, R. Ent3, H. C. Fenker3, B. Fox14, L. Gan6, H. Gao11, K. Garrow3, D. Gaskell4, A. Gasparian6, D. F. Geesaman4, R. Gilman3,15, C. Glashausser15, P. Gueye6, M. Harvey6, R. J. Holt1,*, H. E. Jackson4, X. Jiang15, C. E. Keppel3,6, E. R. Kinney14, Y. Liang9, W. Lorenzon17, A. F. Lung3, D. J. Mack3, P. E. Markowitz8, J. Martin11, K. McIlhany11, D. McKee18, D. G. Meekins19, M. A. Miller1, R. G. Milner11, J. H. Mitchell3, H. Mkrtchyan5, B. A. Mueller4, A. M. Nathan1, G. Niculescu20, I. Niculescu21, T. G. O'Neill4, V. Papavassiliou18, S. F. Pate18, R. B. Piercey13, D. H. Potterveld4, R. D. Ransome15, J. Reinhold8, E. Rollinde3, P. Roos10, A. Saha3, A. J. Sarty19,†, R. Sawafta2, E. Segbefia6, T. Shin11, S. Stepanyan5, S. Strauch15, M. F. Sutter11, V. Tadevosyan5, L. Tang6, R. Tieulent3, A. Uzzle6, W. F. Vulcan3, S. A. Wood3, F. Xiong9, L. Yuan6, M. Zeier12, B. Zihlmann12, and V. Ziskin11
1University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
2North Carolina A&T State University, Greensboro, North Carolina 27411
3Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606
4Argonne National Laboratory, Argonne, Illinois 60439
5Yerevan Physics Institute, Yerevan, Armenia
6Hampton University, Hampton, Virginia 23668
7Vrije Universiteit, Amsterdam, The Netherlands
8Florida International University, University Park, Florida 33199
9University of Massachusetts, Amherst, Massachusetts 01003
10University of Maryland, College Park, Maryland 20742
11Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
12University of Virginia, Charlottesville, Virginia 22901
13Mississippi State University, Starkville, Mississippi 39759
14University of Colorado, Boulder, Colorado 80309
15Rutgers University, New Brunswick, New Jersey 08903
16American University, Washington, D.C. 20016
17University of Michigan, Ann Arbor, Michigan 48109
18New Mexico State University, Las Cruces, New Mexico 88003
19Florida State University, Tallahassee, Florida 32306
20Ohio University, Athens, Ohio 45701
21George Washington University, Washington, D.C. 20052
Received 4 June 2001; published 16 August 2001
The first measurements of the d(γ,p)n differential cross section at forward angles and photon energies above 4 GeV were performed at the Thomas Jefferson National Accelerator Facility (JLab). The results indicate evidence of an angular dependent scaling threshold. Results at θcm = 37° are consistent with the constituent counting rules for Eγ≳4GeV, while those at 70° are consistent with the constituent counting rules for Eγ≳1.5GeV.
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.102302
DOI:
10.1103/PhysRevLett.87.102302
PACS:
13.75.Cs, 24.85.+p, 25.10.+s, 25.20.-x
*Present address: Physics Division, Argonne National Laboratory, Argonne, IL 60439. †Present address: St. Mary's University, Halifax, NS, Canada.
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