CODATA Recommended Values of the Fundamental Physical Constants: 1998

Peter J Mohr,Barry N Taylor

doi:10.1063/1.556049

Abstract

This paper gives the 1998 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use. Further, it describes in detail the adjustment of the values of the subset of constants on which the complete 1998 set of recommended values is based. The 1998 set replaces its immediate predecessor recommended by CODATA in 1986. The new adjustment, which takes into account all of the data available through 31 December 1998, is a significant advance over its 1986 counterpart. The standard uncertainties (i.e., estimated standard deviations) of the new recommended values are in most cases about 1/5 to 1/12 and in some cases 1/160 times the standard uncertainties of the corresponding 1986 value. Moreover, in almost all cases the absolute values of the differences between the 1998 values and the corresponding 1986 values are less than twice the standard uncertainties of the 1986 values. The new set of recommended values is available on the World Wide Web at physics.nist.gov/constants.

Highlights

IntroductionThis article reports work carried out under the auspices of the Committee on Data for Science and Technology (CODATA) Task Group on Fundamental Constants
Because the value of G resulting from this experiment is correlated with the National Institute of Standards and Technology (NIST)-University of Virginia (UVa) value and both values are being included in the adjustment, we evaluated the correlation coefficient of the two results
The focus of this section is (i) comparison of the 2010 and 2006 recommended values of the constants and identification of those new results that have contributed most to the changes in the 2006 values; (ii) presentation of several conclusions that can be drawn from the 2010 recommended values and the input data on which they are based; and (iii) identification of new experimental and theoretical work that can advance our knowledge of the values of the constants

Summary

Introduction

This article reports work carried out under the auspices of the Committee on Data for Science and Technology (CODATA) Task Group on Fundamental Constants.. This article reports work carried out under the auspices of the Committee on Data for Science and Technology (CODATA) Task Group on Fundamental Constants.1 It describes in detail the CODATA 2010 least-squares adjustment of the values of the constants, for which the closing date for new data was 31 December 2010. Important, it gives the 2010 self-consistent set of over 300 CODATA recommended values of the fundamental physical constants based on the 2010 adjustment. If the 1998 set is counted as the first of the new 4-year cycle, the 2010 set is the 4th of that cycle

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Conclusion