Precise Measurement of theΣ+Magnetic Moment

Abstract
The Σ+ magnetic moment is measured to be (2.38±0.02)μN with use of 44 457 polarized Σ+pπ0 decays in a charged hyperon beam. The inclusively produced Σ+ in this 210-GeV/c beam have a polarization of about 0.20 for production angles between 2.5 and 7.0 mrad.