${{\mathit \mu}}$ MASS

INSPIRE   JSON  (beta) PDGID:
S004M
The mass is known more precisely in u (atomic mass units) than in MeV. The conversion is: 1 u = 931.494 102 42(28) MeV/c${}^{2}$ (2018 CODATA value, TIESINGA 2021). The conversion error contributes significantly to the uncertainty of the masses given below.

VALUE (MeV) DOCUMENT ID TECN CHG  COMMENT
$105.6583755$ $\pm0.0000023$
TIESINGA
2021
RVUE 2018 CODATA value
• • We do not use the following data for averages, fits, limits, etc. • •
$105.6583745$ $\pm0.0000024$
MOHR
2016
RVUE 2014 CODATA value
$105.6583715$ $\pm0.0000035$
MOHR
2012
RVUE 2010 CODATA value
$105.6583668$ $\pm0.0000038$
MOHR
2008
RVUE 2006 CODATA value
$105.6583692$ $\pm0.0000094$
MOHR
2005
RVUE 2002 CODATA value
$105.6583568$ $\pm0.0000052$
MOHR
1999
RVUE 1998 CODATA value
$105.658353$ $\pm0.000016$ 1
COHEN
1987
RVUE 1986 CODATA value
$105.658386$ $\pm0.000044$ 2
MARIAM
1982
CNTR +
$105.65836$ $\pm0.00026$ 3
CROWE
1972
CNTR
$105.65865$ $\pm0.00044$ 4
CRANE
1971
CNTR
1  Converted to MeV using the 1998 CODATA value of the conversion constant, $931.494013$ $\pm0.000037$ MeV/u.
2  MARIAM 1982 give ${\mathit m}_{{{\mathit \mu}}}/{\mathit m}_{{{\mathit e}}}$ = 206.768259(62).
3  CROWE 1972 give ${\mathit m}_{{{\mathit \mu}}}/{\mathit m}_{{{\mathit e}}}$ = 206.7682(5).
4  CRANE 1971 give ${\mathit m}_{{{\mathit \mu}}}/{\mathit m}_{{{\mathit e}}}$ = 206.76878(85).
References