%I M4324
%S 1,0,0,7,2,7,6,4,6,6
%N Decimal expansion of proton mass (mass units).
%C In the current theory of strong and electroweak interactions, this is not a mathematical constant but an experimental summary of (virtual) quark rests masses plus contributions from gluon (meson) and electroweak (photon, WZ boson) exchange energies (in the scope of general relativity). [I've changed the last two digits to the current "best" estimates, 7,0>6,7]  _R. J. Mathar_, Aug 09 2007
%D J. Borwein and P. Borwein, A Dictionary of Real Numbers, Wadsworth, Pacific Grove, Calif., 1990, p. v.
%D H. J. Fischbeck and K. Fischbeck, Formulas. Facts and Constants, SpringerVerlag, NY, 2nd ed., 1987.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H NIST, <a href="https://physics.nist.gov/cgibin/cuu/Value?mpu">CODATA value: proton mass in u</a>
%Y Cf. A005601.
%K cons,nonn,nice,hard
%O 1,4
%A _N. J. A. Sloane_, _Mira Bernstein_
%E Updated by _Ivan Panchenko_, May 30 2019
