Anomalies and Symmetries

by ChrisVer
Tags: anomalies, symmetries
ChrisVer is offline
Dec9-13, 12:45 PM
P: 377
I am trying to understand the concept of anomalies and the global or gauge symmetry breaking, i.e. the Lepton and Baryon number symmetries.

Could someone explain me, what we mean by saying that the Baryon or Lepton U(1) symmetries are broken? and how is that done?
I've seen the loop diagram - eg a current of B or L coming in and annihilating into two U(1)_Y bosons- and how this leads into non trivial current divergence.... But I cannot or didn't see where the factor of energy comes in... (because in low energies, the B,L numbers are "good").
Phys.Org News Partner Physics news on
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Mapping the road to quantum gravity
Chameleon crystals could enable active camouflage (w/ video)

Register to reply

Related Discussions
Internal (gauge) symmetries and spacetime symmetries High Energy, Nuclear, Particle Physics 54
Anomalies of H20 Chemistry 2
non-abelian anomalies Quantum Physics 2
D!=26 anomalies General Physics 12
D!=26 anomalies Beyond the Standard Model 5