# Symmetry and conservation laws related to baryon number, lepton number and strangeness

According to Noether's theorem, Every continuous symmetry of the action leads to a conservation law. For example, conservation of linear momentum corresponds to translational symmetry, conservation of angular momentum corresponds to rotational symmetry.

My question is on the conservation of baryon number, lepton number and strangeness. What type of symmetry does imply when the above mentioned quantities are conserved in a system?

-
–  Qmechanic Oct 1 '12 at 6:16