  By analogy with the solution of the classical physics problems achieved not
by an extension of the established dynamic and symmetry knowledge but by the
emergence of a fundamentally new empirical physical constant h leading to
quantum mechanics, I address in this paper the known basic problems of lepton
mass ratios, neutrino type and electroweak charges in terms of an emerging new
dimensionless flavor-electroweak physical constant of a new sort. A special
value of that new universal constant is suggested av0 = exp(-5). Like the Plank
constant h, initially closely related to suggested discrete radiation energy,
the new constant a_o is related here to the problem of discrete electric
charge. With known data, it is observed that the constant a_o determines the
mass ratios of charged leptons, the mass ratios and absolute mass scale and
oscillation mass squared differences of quasidegenerate neutrinos on the one
hand, and the low energy fine structure constant and the second electroweak
constant on the other hand. I gathered, organized and commented here an
interesting system of primary observations made on particle mass and
electroweak experimental data. As a result, the new physical constant a_o
describes a fundamental aspect of low energy phenomenology uniting the
electroweak theory with the necessary idea of anthropic selection of the free
interaction constant values and particle flavor freedom mass values.
