The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
Topics:
Values
Energy
Equivalents
Searchable
Bibliography
Background
Constants
Bibliography
Constants,
Units &
Uncertainty
home page
[skip navigation]
muon-tau mass ratio
 $m_{\rmssmu}/m_{\rmsstau}$
 Numerical value  5.946 35 x 10-2
 Standard uncertainty  0.000 40 x 10-2
  Relative standard uncertainty  6.8 x 10-5
 Concise form  5.946 35(40) x 10-2    
 
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

 
Go to a new search