Baryogenesis and leptogenesis are also connected by a phenomenon that happens in the Standard Model that allows to convert baryon number and lepton number into each other.
22.
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.
23.
Similarly, the muons and their neutrinos are assigned a muon number of + 1 and the tau leptons are assigned a tau lepton number of + 1.
24.
For both left and right chirality cases, Majorana terms violate lepton number, but possibly at a level beyond the current sensitivity of experiments to detect such violations.
25.
Beta decay conserves a quantum number known as the lepton number, or the number of electrons and their associated neutrinos ( other leptons are the muon and tau particles ).
26.
He discovered the unstable " sphaleron " solution in the baryon and lepton number violation in the early universe an energy scale within the range of the Large Hadron Collider.
27.
The photon is the gauge boson for electromagnetism, and therefore all other quantum numbers of the photon ( such as lepton number, baryon number, and flavour quantum numbers ) are zero.
28.
The anomalies that would break baryon number conservation and lepton number conservation individually cancel in such a way that " B " " " L " is always conserved.
29.
If there is a quantum number " a " associated with the U ( 1 ) symmetry, for example baryon and the three lepton numbers in electromagnetic interactions, we have:
30.
To conserve total lepton number, in nuclear beta decay, electron neutrinos appear together with only positrons ( anti-electrons ) or electron-antineutrinos, and electron antineutrinos with electrons or electron neutrinos.
