The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
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muon magnetic moment anomaly
 $ a_{\rm\mu} = |\mu_{\rm\mu}|/(e\hbar/2m_{\rm\mu}) -1$
 Numerical value  1.165 920 89 x 10-3
 Standard uncertainty  0.000 000 63 x 10-3
  Relative standard uncertainty  5.4 x 10-7
 Concise form  1.165 920 89(63) x 10-3    
 
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

 
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