  Apart from the quark and gluon kinetic and potential energies, the nucleon
mass includes a novel energy of pure quantum origin resulting from anomalous
breaking of scale symmetry. We demonstrate the effects of this quantum
anomalous energy (QAE) in QED, as well as in a toy 1+1 dimensional non-linear
sigma model where it contributes non-perturbatively, in a way resembling the
Higgs mechanism for the masses of matter particles in electro-weak theory. The
QAE contribution to the nucleon mass can be explained using a similar
mechanism, in terms of a dynamical response of the gluonic scalar field through
Higgs-like couplings between the nucleon and scalar resonances. In addition,
the QAE sets the scale for other energies in the nucleon through a relativistic
virial theorem, and contributes a negative pressure to confine the colored
quarks.
