| $\bf{
1.007276466621 \pm0.000000000053}$
|
OUR EVALUATION
2018 CODATA
|
| $1.007276466574$ $\pm0.000000000010$ |
1 |
|
SPEC |
| $1.007276466621$ $\pm0.000000000053$ |
2 |
|
RVUE |
| • • • We do not use the following data for averages, fits, limits, etc. • • • |
| $1.007276466598$ $\pm0.000000000033$ |
3 |
|
SPEC |
| $1.007276466583$ $\pm0.000000000032$ |
4 |
|
SPEC |
| $1.007276466879$ $\pm0.000000000091$ |
|
|
RVUE |
| $1.007276466812$ $\pm0.000000000090$ |
|
|
RVUE |
| $1.00727646677$ $\pm0.00000000010$ |
|
|
RVUE |
| $1.00727646688$ $\pm0.00000000013$ |
|
|
RVUE |
| $1.00727646688$ $\pm0.00000000013$ |
|
|
RVUE |
| $1.007276470$ $\pm0.000000012$ |
|
|
RVUE |
|
1
FINK 2021 simultaneously measure the cyclotron frequencies of an ${{\mathit H}_{{{2}}}^{+}}$ ion and a deuteron in a coupled magnetron orbit. The proton mass is extracted using the precise deuteron mass value.
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|
2
The 2018 CODATA combination in TIESINGA 2021 includes data from HEISSE 2017, but does not include updates in HEISSE 2019, which superseded HEISSE 2017. Consequently, we do not average HEISSE 2019 and TIESINGA 2021. Updating the 2018 CODATA combination to use HEISSE 2019 would shift the central value for the proton mass upwards by less than half a standard deviation. Therefore, we take the 2018 CODATA result in TIESINGA 2021 as the recommended value for the proton mass.
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|
3
The value is an update of HEISSE 2017; the result is shifted by $1.5 \times 10^{-11}$ u, corresponding to 0.45 ${{\mathit \sigma}}$ due to the corrected motional temperatures of the particles. The statistical and total systematic uncertainties are given as 16 and 29 in the last two digits.
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|
4
The statistical and systematic errors are 15 and 29 in the last two places of the value. Superseded by HEISSE 2019.
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