The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
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Uncertainty
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weak mixing angle
 $  \sin^2 \theta_{\rm W} = 1 - (m_{\rm W}/m_{\rm Z})^2 $
 Numerical value  0.222 90
 Standard uncertainty  0.000 30
  Relative standard uncertainty  1.3 x 10-3
 Concise form  0.222 90(30)    
 
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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