Is there a conserved quantity for Parity Symmetry?

Question

I've recently read about the Cobalt-60 experiment and Parity violation on weak interactions, what says the parity is not a symmetry on weak interactions.

But if I did not understand wrong EM and strong interactions parity isn't violated, so is it a symmetry? Could we apply the noether's theorem to reflections just like in rotations and translations? What would be the conserved quantity? I'm new on this topics so corrections to some concept will be apreciated

Related: https://physics.stackexchange.com/q/8518/2451 and links therein. — Qmechanic, Dec 13 '17 at 06:41

score 4 · Accepted Answer · answered Dec 13 '17 at 04:10

4

Noether's theorem only applies to continuous transformations. Parity is discrete.

answered Dec 13 '17 at 04:10

user1504

16,358

You are right, small detail that I did not take into account. Thanks! – Julian Ar. Dec 13 '17 at 04:34

score 1 · Answer 2 · answered Dec 13 '17 at 04:34

1

The conserved quantity is parity. Even states remain even, odd states remain odd. Discrete symmetries lead to discrete conserved quantities.

answered Dec 13 '17 at 04:34

JEB

33,420

Is there a conserved quantity for Parity Symmetry?

2 Answers2