The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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weak mixing angle
 $ \sin^2 \theta_{\rm W} = 1 - (m_{\rm W}/m_{\rm Z})^2 $
 Numerical value  0.223 05
 Standard uncertainty  0.000 23
  Relative standard uncertainty  1.0 x 10-3
 Concise form  0.223 05(23)    
 
Click here for correlation coefficient of this constant with other constants
Source: 2022 CODATA     
recommended values 		 Definition of
uncertainty 		      Correlation coefficient with
any other constant

 

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