lepton number

The source current looks like a matter fermion field associated with baryon and lepton number.

However, the (total) lepton number conservation law must still hold (under the Standard Model).

Thus the lepton number is 0 after the decay, and so this quantity is conserved.

Lepton number as the fourth "color"

If confirmed it would indicate (total) lepton number violation, and provide evidence that the neutrino is a Majorana particle.

Typical internal symmetries are lepton number and baryon number or the electric charge.

Weak hypercharge is related to baryon number - lepton number via:

Conservation of lepton number (In the Standard Model)

They simply provided the simplest realisation of the quark-lepton universality by postulating that "Lepton number is the fourth colour.

This term also allows for lepton number violating pion decays, and for proton decay.

The lepton family numbers arise from the fact that lepton number is usually conserved in each leptonic family.

Because the lepton number conservation law in fact is violated by chiral anomalies, there are problems applying this symmetry universally over all energy scales.

This violates conservation of baryon number and lepton number, but the difference B L is conserved.

There, the exchange of supersymmetric particles such as squarks and sleptons can break the lepton number and lead to neutrino masses.

In particle physics, the lepton number is the number of leptons minus the number of antileptons.

His major research interests are neutrino physics, unification of elementary particle forces, baryon and lepton number violation and supersymmetry.

In physics, leptogenesis is the process of creating a lepton-antilepton asymmetry (lepton number) in the early stages of the universe.

The conserved entities are total energy (including mass), number of nucleons, linear and angular momentum, and lepton number.

Hence proton decay conserves B-L, even though it violates both lepton number and baryon number conservation.

For instance, the electron has a lepton number of one and an electric charge of one, and there are no lighter particles that conserve these values.

In some theories, the individual baryon and lepton number conservation can be violated, if the difference between them (B L) is conserved (see chiral anomaly).

In the supersymmetry theory of particle physics, ordinary quarks and leptons have scalar partners that carry baryon and lepton numbers.

If neutrinos are indeed Majorana particles then the neutrinoless double beta decay, as well as a range of other lepton number violating phenomena, are allowed.

Gauge theories suggest that neutrinos are Majorana fermions, so lepton number is violated in nature, which could be verified in both low and high energy experiments.

The anomalies that would break baryon number conservation and lepton number conservation individually cancel in such a way that B L is always conserved.