More general energy and charge conservation principles are to be used.

I think the confusion here is about charge conservation, however.

The charge conservation allows the decay of the ball into Q particles exactly.

This is the ultimate theoretical origin of charge conservation.

In electromagnetic theory, the continuity equation is an empirical law expressing (local) charge conservation.

The theoretical justification for charge conservation is greatly strengthened by being linked to this symmetry.

In physics, charge conservation is the principle that electric charge can neither be created nor destroyed.

Gauge symmetry is closely related to charge conservation.

Again, the second equation implies charge conservation (in curved spacetime):

It seems to violate charge conservation... the final-state pion should probably be neutral.

The symmetry that is associated with charge conservation is the global gauge invariance of the electromagnetic field.

(The currents and charges are not unknowns, being freely specifiable subject to charge conservation.)

Charge conservation requires that the net current into a volume must necessarily equal the net change in charge within the volume.

The best experimental tests of electric charge conservation are searches for particle decays that would be allowed if electric charge is not always conserved.

Mathematically it is an automatic consequence of Maxwell's equations, although charge conservation is more fundamental than Maxwell's equations.

In the frame of rate equations model, carrier lifetime is used in the charge conservation equation as the time constant of the exponential decay of carriers.

In special relativity, the statement of charge conservation is that the Lorentz invariant divergence of J is zero:

The Higgs condensate in this model has infinitesimal charge, so interactions with the Higgs boson do not violate charge conservation.

The quantum spin Hall state does not break charge conservation symmetry and spin- conservation symmetry (in order to have well defined Hall conductances).

In this example, the gauge transformations was just a mathematical feature without any physical significance, except that gauge invariance is intrinsically connected to the fundamental law of charge conservation.

In essence, charge conservation is an accounting relationship between the amount of charge in a region and the flow of charge into and out of that region.

Due to charge conservation, it would be impossible for matter cannon to produce either individual protons or electrons; only neutrons or proton-electron pairs could come into existence by any means.

(Note that the quantum spin Hall state is also a symmetry protected topological state protected by charge conservation symmetry and spin- conservation symmetry.

Color charge conservation means that the ends of these color-lines must be either in the initial or final state, equivalently, that no lines break in the middle of a diagram.

The positive charge symbol that would appear to be required for charge conservation is omitted, because S is a macroscopic surface and the loss of one electron has a negligible effect.