Parity-violating electron scattering from He4 and the strange electric form factor of the nucleon

K. A. Aniol, D. S. Armstrong, T. Averett, H. Benaoum, P. Y. Bertin, E. Burtin, J. Cahoon, G. D. Cates, C. C. Chang, Y. C. Chao, J. P. Chen, Seonho Choi, E. Chudakov, B. Craver, F. Cusanno, P. Decowski, D. Deepa, C. Ferdi, R. J. Feuerbach, J. M. FinnS. Frullani, K. Fuoti, F. Garibaldi, R. Gilman, A. Glamazdin, V. Gorbenko, J. M. Grames, J. Hansknecht, D. W. Higinbotham, R. Holmes, T. Holmstrom, T. B. Humensky, H. Ibrahim, C. W. De Jager, X. Jiang, L. J. Kaufman, A. Kelleher, A. Kolarkar, S. Kowalski, K. S. Kumar, D. Lambert, P. Laviolette, J. Lerose, D. Lhuillier, N. Liyanage, D. J. Margaziotis, M. Mazouz, K. McCormick, D. G. Meekins, Z. E. Meziani, R. Michaels, B. Moffit, P. Monaghan, C. Munoz-Camacho, S. Nanda, V. Nelyubin, D. Neyret, K. D. Paschke, M. Poelker, R. Pomatsalyuk, Y. Qiang, B. Reitz, J. Roche, A. Saha, J. Singh, R. Snyder, P. A. Souder, R. Subedi, R. Suleiman, V. Sulkosky, W. A. Tobias, G. M. Urciuoli, A. Vacheret, E. Voutier, K. Wang, R. Wilson, B. Wojtsekhowski, X. Zheng

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Abstract

We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from He4 at an average scattering angle θlab=5.7° and a four-momentum transfer Q2=0.091GeV2. From these data, for the first time, the strange electric form factor of the nucleon GEs can be isolated. The measured asymmetry of APV=(6.72±0.84(stat)±0. 21(syst))×10-6 yields a value of GEs=-0.038±0.042(stat)±0. 010(syst), consistent with zero.

Original languageEnglish (US)
Article number022003
JournalPhysical Review Letters
Volume96
Issue number2
DOIs
StatePublished - Jan 20 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Aniol, K. A., Armstrong, D. S., Averett, T., Benaoum, H., Bertin, P. Y., Burtin, E., Cahoon, J., Cates, G. D., Chang, C. C., Chao, Y. C., Chen, J. P., Choi, S., Chudakov, E., Craver, B., Cusanno, F., Decowski, P., Deepa, D., Ferdi, C., Feuerbach, R. J., ... Zheng, X. (2006). Parity-violating electron scattering from He4 and the strange electric form factor of the nucleon. Physical Review Letters, 96(2), [022003]. https://doi.org/10.1103/PhysRevLett.96.022003