%I M4324 #17 May 31 2019 02:59:07

%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, W-Z 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, Springer-Verlag, 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/cgi-bin/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