Value for tau Compton wavelength over 2 pi
type: ConstantValue
has unit: http://qudt.org/vocab/unit/M
informative reference: http://physics.nist.gov/cuu/Constants/bibliography.html
standard uncertainty: 0.000000000000000000018
standard uncertainty SN: 1.8E-20
value: 0.000000000000000111046
value SN: 1.11046E-16
website: http://physics.nist.gov/cgi-bin/cuu/Value#mid