Phys. Rev. Lett.
92,
042301
(2004)
[5 pages]
Measurement of the Electric Form Factor of the Neutron at Q2=0.5 and 1.0 GeV2/c2
G. Warren et al. Jefferson Lab E93-026 Collaboration
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G. Warren1,2, F. Wesselmann3, H. Zhu3, P. McKee3, N. Savvinov4, M. Zeier3, A. Aghalaryan5, A. Ahmidouch6, H. Arenhövel7, R. Asaturyan5, I. Ben-Dayan8, F. Bloch1, W. Boeglin9, B. Boillat1, H. Breuer4, J. Brower10, C. Carasco1, M. Carl9, R. Carlini2, J. Cha11, N. Chant4, E. Christy12, L. Cole12, L. Coman9, M. Coman9, D. Crabb3, S. Danagoulian6, D. Day3, K. Duek8, J. Dunne11, M. Elaasar13, R. Ent2, J. Farrell3, R. Fatemi3, D. Fawcett3, H. Fenker2, T. Forest14, K. Garrow2, A. Gasparian12, I. Goussev1, P. Gueye12, M. Harvey12, M. Hauger1, R. Herrera9, B. Hu12, I. Jaegle1, M. Jones2, J. Jourdan1, C. Keith2, J. Kelly4, C. Keppel12, M. Khandaker15, A. Klein16, A. Klimenko16, L. Kramer9, B. Krusche1, S. Kuhn16, Y. Liang12, J. Lichtenstadt8, R. Lindgren3, J. Liu4, A. Lung2, D. Mack2, G. Maclachlan10, P. Markowitz9, D. McNulty3, D. Meekins2, J. Mitchell2, H. Mkrtchyan5, R. Nasseripour9, I. Niculescu2, K. Normand1, B. Norum3, A. Opper10, E. Piasetzky8, J. Pierce3, M. Pitt17, Y. Prok3, B. Raue9, J. Reinhold9, J. Roche2, D. Rohe1, O. Rondon3, D. Sacker1, B. Sawatzky3, M. Seely2, I. Sick1, N. Simicevic14, C. Smith3, G. Smith2, M. Steinacher1, S. Stepanyan5, J. Stout6, V. Tadevosyan5, S. Tajima18, L. Tang12, G. Testa1, R. Trojer1, B. Vlahovic19, B. Vulcan2, K. Wang3, S. Wells14, H. Woehrle1, S. Wood2, C. Yan2, Y. Yanay8, L. Yuan12, J. Yun17, and B. Zihlmann20 (Jefferson Lab E93-026 Collaboration)
1Universität Basel, CH-4056 Basel, Switzerland
2Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
3University of Virginia, Charlottesville 22903, USA
4University of Maryland, College Park, Maryland 20742, USA
5Yerevan Physics Institute, Yerevan, Armenia
6North Carolina A&T State University, Greensboro, North Carolina 27411, USA
7Johannes Gutenberg-Universität, D-55099 Mainz, Germany
8Tel Aviv University, Tel Aviv, 69978 Israel
9Florida International University, Miami, Florida 33199, USA
10Ohio University, Athens, Ohio 45071, USA
11Mississippi State University, Mississippi State, Mississipi 39762, USA
12Hampton University, Hampton, Virginia 23668, USA
13Southern University at New Orleans, New Orleans, Louisiana 70126, USA
14Louisiana Tech University, Ruston, Louisiana 71272, USA
15Norfolk State University, Norfolk, Virginia 23504, USA
16Old Dominion University, Norfolk, Virginia 23529, USA
17Virginia Polytechnic Institute & State University, Blacksburg, Virginia 24061, USA
18Duke University and TUNL, Durham, North Carolina 27708, USA
19North Carolina Central University, Durham, North Carolina 27707, USA
20Vrije Universiteit, 1081 HV Amsterdam, The Netherlands
Received 1 August 2003; published 29 January 2004
The electric form factor of the neutron was determined from measurements of the d⃗(e⃗,e′n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia (15ND3) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find GEn=0.0526±0.0033(stat)±0.0026(sys) and 0.0454±0.0054±0.0037 at Q2=0.5 and 1.0 (GeV/c)2, respectively.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.042301
DOI:
10.1103/PhysRevLett.92.042301
PACS:
14.20.Dh, 13.40.Gp, 24.70.+s, 25.40.Ve
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