Baryon and Lepton Number
Weak hypercharge is related to baryon number - lepton number via:
where X is a GUT-associated conserved quantum number. Since weak hypercharge is also conserved this implies that baryon number minus lepton number is also conserved, within the Standard Model and most extensions.
Read more about this topic: Weak Hypercharge
Famous quotes containing the word number:
“The said truth is that it is the greatest happiness of the greatest number that is the measure of right and wrong.”
—Jeremy Bentham (1748–1832)