The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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triton-electron mass ratio
 $m_{\rm t}/m_{\rm e}$
 Value  5496.921 535 88
 Standard uncertainty     0.000 000 26
  Relative standard uncertainty   4.6 x 10-11
 Concise form  5496.921 535 88(26)    
 
Click here for correlation coefficient of this constant with other constants
Source: 2014 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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