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muon magnetic moment  Numerical value  -4.490 448 30 x 10-26 J T-1  Standard uncertainty   0.000 000 10 x 10-26 J T-1   Relative standard uncertainty  2.2 x 10-8  Concise form  -4.490 448 30(10) x 10-26 J T-1       Click here for correlation coefficient of this constant with other constants Source: 2018 CODATA      recommended values  Definition of uncertainty       Correlation coefficient with any other constant