The Difference between Baryon and Lepton Number

Dr. Julian Heeck (Hosted by Dev), University of California, Irvine

The difference between baryon and lepton number, B-L, is a conserved quantum number in the Standard Model of particle physics. So far we have not observed any B-L violation, nor any new force coupled to this charge. We will review the different possibilities for this U(1)_(B-L) symmetry (local vs. global, unbroken vs. broken) and highlight connections to neutrino physics and dark matter.