Phys. Rev. C
70,
015206
(2004)
[15 pages]
Measurements of electron-proton elastic cross sections for 0.4<Q2<5.5 (GeV∕c)2
M. E. Christy et al.
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M. E. Christy7, A. Ahmidouch15, C. S. Armstrong19, J. Arrington2, R. Asaturyan23, S. Avery7, O. K. Baker7,19, D. H. Beck8, H. P. Blok21, C. W. Bochna8, W. Boeglin4,19, P. Bosted10, M. Bouwhuis8, H. Breuer9, D. S. Brown9, A. Bruell11, R. D. Carlini19, N. S. Chant9, A. Cochran7, L. Cole7, S. Danagoulian15, D. B. Day20, J. Dunne13, D. Dutta11, R. Ent19, H. C. Fenker19, B. Fox3, L. Gan7, H. Gao11, K. Garrow19, D. Gaskell2,17, A. Gasparian7, D. F. Geesaman2, P. L. J. Guèye7, M. Harvey7, R. J. Holt8, X. Jiang17, C. E. Keppel7,19, E. Kinney3, Y. Liang1,7, W. Lorenzon12, A. Lung19, P. Markowitz4,19, J. W. Martin11, K. McIlhany11, D. McKee14, D. Meekins5, M. A. Miller8, R. G. Milner11, J. H. Mitchell19, H. Mkrtchyan23, B. A. Mueller2, A. Nathan8, G. Niculescu16, I. Niculescu6, T. G. O’Neill2, V. Papavassiliou14,19, S. F. Pate14,19, R. B. Piercey13, D. Potterveld2, R. D. Ransome18, J. Reinhold4,19, E. Rollinde19,22, P. Roos9, A. J. Sarty5, R. Sawafta15, E. C. Schulte8, E. Segbefia7, C. Smith20, S. Stepanyan23, S. Strauch18, V. Tadevosyan23, L. Tang7,19, R. Tieulent9,19, A. Uzzle7, W. F. Vulcan19, S. A. Wood19, F. Xiong11, L. Yuan7, M. Zeier20, B. Zihlmann20, and V. Ziskin11
1American University, Washington, D.C. 20016, USA
2Argonne National Laboratory, Argonne, Illinois 60439, USA
3University of Colorado, Boulder, Colorado 80309, USA
4Florida International University, University Park, Florida 33199, USA
5Florida State University, Tallahassee, Florida 32306, USA
6The George Washington University, Washington, D.C. 20052, USA
7Hampton University, Hampton, Virginia 23668, USA
8University of Illinois, Champaign-Urbana, Illinois 61801, USA
9University of Maryland, College Park, Maryland 20742, USA
10University of Massachusetts, Amherst, Massachusetts 01003, USA
11Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
12University of Michigan, Ann Arbor, Michigan 48109, USA
13Mississippi State University, Mississippi State, Mississippi 39762, USA
14New Mexico State University, Las Cruces, New Mexico 88003, USA
15North Carolina A & T State University, Greensboro, North Carolina 27411, USA
16Ohio University, Athens, Ohio 45071, USA
17Oregon State University, Corvallis, Oregon 97331, USA
18Rutgers University, New Brunswick, New Jersey 08855, USA
19Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
20University of Virginia, Charlottesville, Virginia 22901, USA
21Vrije Universiteit, 1081 HV Amsterdam, The Netherlands
22College of William and Mary, Williamsburg, Virginia 23187, USA
23Yerevan Physics Institute, 375036, Yerevan, Armenia
Received 31 March 2004; published 21 July 2004
We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The measurements were made at 28 distinct kinematic settings covering a range in momentum transfer of 0.4<Q2<5.5 (GeV∕c)2. These measurements represent a significant contribution to the world’s cross section data set in the Q2 range, where a large discrepancy currently exists between the ratio of electric to magnetic proton form factors extracted from previous cross section measurements and that recently measured via polarization transfer in Hall A at Jefferson Lab. This data set shows good agreement with previous cross section measurements, indicating that if a heretofore unknown systematic error does exist in the cross section measurements, then it is intrinsic to all such measurements.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.70.015206
DOI:
10.1103/PhysRevC.70.015206
PACS:
25.30.Bf, 13.40.Gp, 14.20.Dh
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