Value for proton-muon mass ratio
type: ConstantValue
has unit: UNITLESS
informative reference: http://physics.nist.gov/cuu/Constants/bibliography.html
standard uncertainty: 0.00000023
standard uncertainty SN: 2.3E-7
value: 8.88024339
value SN: 8.88024339E0
website: http://physics.nist.gov/cgi-bin/cuu/Value#mid