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${{\mathit \Sigma}^{+}}$ MAGNETIC MOMENT

INSPIRE   PDGID:

S019MM

See the “Quark Model” review. Measurements with an error ${}\geq{}$ $0.1$ ${\mathit \mu}_{{{\mathit N}}}$ have been omitted.

VALUE ($\mu _{\mathit N}$) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 2.458 \pm0.010}$ OUR AVERAGE  Error includes scale factor of 2.1.  See the ideogram below. $2.4613$ $\pm0.0034$ $\pm0.0040$ 250k MORELOS 1993 SPEC ${{\mathit p}}{}^{}\mathrm {Cu}$ 800 GeV $2.428$ $\pm0.036$ $\pm0.007$ 12k 1 MORELOS 1993 SPEC ${{\mathit p}}{}^{}\mathrm {Cu}$ 800 GeV $2.479$ $\pm0.012$ $\pm0.022$ 137k WILKINSON 1987 SPEC ${{\mathit p}}{}^{}\mathrm {Be}$ 400 GeV $2.4040$ $\pm0.0198$ 44k 2 ANKENBRANDT 1983 CNTR ${{\mathit p}}{}^{}\mathrm {Cu}$ 400 GeV 1  We assume $\mathit CPT$ invariance: this is (minus) the ${{\overline{\mathit \Sigma}}^{-}}$ magnetic moment as measured by MORELOS 1993 . See below for the moment difference testing $\mathit CPT$. 2  ANKENBRANDT 1983 gives the value $2.38$ $\pm0.02{\mathit \mu}_{{{\mathit N}}}$. MORELOS 1993 uses the same hyperon magnet and channel and claims to determine the field integral better, leading to the revised value given here.

${{\mathit \Sigma}^{+}}$ magnetic moment ($\mu _{\mathit N}$)

References:

MORELOS 1993 PRL 71 3417 Measurement of the Magnetic Moments of the ${{\mathit \Sigma}^{+}}$ and ${{\overline{\mathit \Sigma}}^{-}}$ Hyperons WILKINSON 1987 PRL 58 855 Polarization and Magnetic Moment of the ${{\mathit \Sigma}^{+}}$ Hyperon ANKENBRANDT 1983 PRL 51 863 Precise Measurement of the ${{\mathit \Sigma}^{+}}$ Magnetic Moment