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Published May 19, 1997 | public
Journal Article Open

Measurement of the Proton's Neutral Weak Magnetic Form Factor


We report the first measurement of the parity-violating asymmetry in elastic electron scattering from the proton. The asymmetry depends on the neutral weak magnetic form factor of the proton which contains new information on the contribution of strange quark-antiquark pairs to the magnetic moment of the proton. We obtain the value GMZ = 0.34±0.09±0.04±0.05 n.m. at Q^2 = 0.1 (GeV/c)^2.

Additional Information

©1997 The American Physical Society. Received 24 February 1997. The persistent efforts of the staff of the MIT/Bates facility to provide high quality beam and improve the experiment are gratefully acknowledged. Financial support for the construction of the Moller apparatus from CEBAF is acknowledged. This work was supported by NSF Grants No. PHY-9420470 (Caltech), No. PHY-9420787 (Illinois), No. PHY-9457906yPHY-9229690 (Maryland), No. PHY-9507412 (RPI), and DOE Cooperative Agreement No. DE-FC02-94ER40818 (MIT/Bates).


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