Measurement of the electric form factor of the neutron at Q2=0.5 and 1.0 GeV2/c2.

/ Authors

G. Warren, F. Wesselmann, H. Zhu, P. McKee, N. Savvinov, M. Zeier, A. Aghalaryan, A. Ahmidouch, H. Arenhövel, R. Asaturyan

and 99 more authors

I. Ben-Dayan, F. Bloch, W. Boeglin, B. Boillat, H. Breuer, J. Brower, C. Carasco, M. Carl, R. Carlini, J. Cha, N. Chant, E. Christy, L. Cole, L. Coman, M. Coman, D. Crabb, S. Danagoulian, D. Day, K. Duek, J. Dunne, M. Elaasar, R. Ent, J. Farrell, R. Fatemi, D. Fawcett, H. Fenker, T. Forest, K. Garrow, A. Gasparian, I. Goussev, P. Guèye, M. Harvey, M. Hauger, R. Herrera, B. Hu, I. Jaegle, Melina V Jones, J. Jourdan, C. Keith, J. Kelly, C. Keppel, M. Khandaker, A. Klein, A. Klimenko, L. Kramer, B. Krusche, S. Kuhn, Y. Liang, J. Lichtenstadt, R. Lindgren, J. Liu, A. Lung, D. Mack, G. MacLachlan, P. Markowitz, D. Mcnulty, D. Meekins, J. Mitchell, H. Mkrtchyan, R. Nasseripour, I. Niculescu, K. Normand, B. Norum, A. Opper, E. Piasetzky, J. Pierce, M. Pitt, Y. Prok, B. Raue, J. Reinhold, J. Roche, D. Rohe, O. Rondon, D. Sacker, B. Sawatzky, M. Seely, I. Sick, N. Simicevic, C. Smith, George Davey Smith, M. Steinacher, S. Stepanyan, J. Stout, V. Tadevosyan, S. Tajima, L. Tang, G. Testa, R. Trojer, B. Vlahovic, B. Vulcan, K. Wang, S. Wells, H. Woehrle, S. Wood, C. Yan, Y. Yanay, L. Yuan, J. Yun, B. Zihlmann

/ Abstract

The electric form factor of the neutron was determined from measurements of the d-->(e-->,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 G(n)(E)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.

Journal: Physical review letters

DOI: 10.1103/PhysRevLett.92.042301