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Spayde, D.T; Beck, D.H; Hasty, R; Averett, T; Barkhuff, D; Dodson, G; Dow, K; Farkhondeh, M; Franklin, W; Tsentalovich, E; Yang, B; Zwart, T; Beise, E.J; Breuer, H; Tieulent, R; Carr, R; Covrig, S; Filippone, B.W; Ito, T.M; McKeown, R.D; Korsch, W; Kowalski, S; Mueller, B; Pitt, M.L; Ramsey-Musolf, M.J; Ritter, J; Wells, S.P
Physics letters. B, 03/2004, Volume: 583, Issue: 1-2Journal Article
We report a new determination of the strange quark contribution to the proton's magnetic form factor at a four-momentum transfer Q2=0.1 (GeV/c)2 from parity-violating e–p elastic scattering. The result uses a revised analysis of data from the SAMPLE experiment which was carried out at the MIT-Bates Laboratory. The data are combined with a calculation of the proton's axial form factor GeA to determine the strange form factor GsM(Q2=0.1)=0.37±0.20±0.26±0.07. The extrapolation of GsM to its Q2=0 limit and comparison with calculations is also discussed.
