Parity Violation in Elastic Electron-Proton Scattering and the Proton's Strange Magnetic Form Factor

Spayde, D.T.; Averett, T.; Barkhuff, D.; Beck, D.H.; Beise, E.J.; Benson, C.; Breuer, H.; Carr, R.; Covrig, S.; DelCorso, J.; Dodson, G.; Dow, K.; Eppstein, C.; Farkhondeh, M.; Filippone, B.W.; Frazier, P.; Hasty, R.; Ito, T.M.; Jones, C.E.; Korsch, W.; Kowalski, S.; Lee, P.; Maneva, E.; McCarty, K.; McKeown, R.D.; Mikell, J.; Mueller, B.; Naik, P.; Pitt, M.; Ritter, J.; Savu, V.; Sullivan, M.; Tieulent, R.; Tsentalovich, E.; Wells, S.P.; Yang, B.; Zwart, T.; SAMPLE Collaboration

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Date

2000-02-07

Author

Spayde, D.T.

Averett, T.

Barkhuff, D.

Beck, D.H.

Beise, E.J.

Benson, C.

Breuer, H.

Carr, R.

Covrig, S.

DelCorso, J.

Dodson, G.

Dow, K.

Eppstein, C.

Farkhondeh, M.

Filippone, B.W.

Frazier, P.

Hasty, R.

Ito, T.M.

Jones, C.E.

Korsch, W.

Kowalski, S.

Lee, P.

Maneva, E.

McCarty, K.

McKeown, R.D.

Mikell, J.

Mueller, B.

Naik, P.

Pitt, M.

Ritter, J.

Savu, V.

Sullivan, M.

Tieulent, R.

Tsentalovich, E.

Wells, S.P.

Yang, B.

Zwart, T.

SAMPLE Collaboration

Citation

Spayde, D.T. "Parity Violation in Elastic Electron-Proton Scattering and the Proton's Strange Magnetic Form Factor." Physical Review Letters 84, no. 6 (2000): 1106-1109.

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Abstract

We report a new measurement of the parity-violating asymmetry in elastic electron scattering from the proton at backward scattering angles. This asymmetry is sensitive to the strange magnetic form factor of the proton as well as electroweak axial radiative corrections. The new measurement of A = -4.92±0.61±0.73ppm provides a significant constraint on these quantities. The implications for the strange magnetic form factor are discussed in the context of theoretical estimates for the axial corrections.