Parity-violating Electron Deuteron Scattering and the Proton’s Neutral Weak Axial Vector Form Factor

Ito, T.M.; Averett, T.; Barkhuff, D.; Batigne, G.; Beck, D.H.; Beise, E.J.; Blake, A.; Breuer, H.; Carr, R.; Clasie, B.; Covrig, S.; Danagoulian, A.; Dodson, G.; Dow, K.; Dutta, D.; Farkhondeh, M.; Filippone, B.W.; Franklin, W.; Furget, C.; Gao, H.; Gao, J.; Gustafsson, K.; Hannelius, L.; Hasty, R.; Hawthorne-Allen, A.M.; Herda, M.C.; Jones, C.E.; King, P.; Korsch, W.; Kowalski, S.; Kox, S.; Kramer, K.; Lee, P.; Liu, J.; Martin, J.W.; McKeown, R.D.; Mueller, B.; Pitt, M.L.; Plaster, B.; Quemener, G.; Real, J. S.; Ritter, J.; Roche, J.; Savu, V.; Schiavilla, R.; Seely, J.; Spayde, D.; Suleiman, R.; Taylor, S.; Tieulent, R.; Tipton, B.; Tsentalovich, E.; Wells, S.P.; Yang, B.; Yuan, J.; Yun, J.; Zwart, T.; SAMPLE Collaboration

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Date

2004-03

Author

Ito, T.M.

Averett, T.

Barkhuff, D.

Batigne, G.

Beck, D.H.

Beise, E.J.

Blake, A.

Breuer, H.

Carr, R.

Clasie, B.

Covrig, S.

Danagoulian, A.

Dodson, G.

Dow, K.

Dutta, D.

Farkhondeh, M.

Filippone, B.W.

Franklin, W.

Furget, C.

Gao, H.

Gao, J.

Gustafsson, K.

Hannelius, L.

Hasty, R.

Hawthorne-Allen, A.M.

Herda, M.C.

Jones, C.E.

King, P.

Korsch, W.

Kowalski, S.

Kox, S.

Kramer, K.

Lee, P.

Liu, J.

Martin, J.W.

McKeown, R.D.

Mueller, B.

Pitt, M.L.

Plaster, B.

Quemener, G.

Real, J. S.

Ritter, J.

Roche, J.

Savu, V.

Schiavilla, R.

Seely, J.

Spayde, D.

Suleiman, R.

Taylor, S.

Tieulent, R.

Tipton, B.

Tsentalovich, E.

Wells, S.P.

Yang, B.

Yuan, J.

Yun, J.

Zwart, T.

SAMPLE Collaboration

Citation

Ito, T. et al. "Parity-violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form Factor." Physical Review Letters 92, no. 10 (2004): 102003.

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Abstract

We report on a new measurement of the parity-violating asymmetry in quasielastic electron scat- tering from the deuteron at backward angles at Q2 = 0.038 (GeV/c)2. This quantity provides a de- termination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A = −3.51 ± 0.57 (stat) ± 0.58 (sys) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2 = 0.091 (GeV/c)2, which are also consistent with theoretical predictions.