# Spin of the pion

1. Feb 5, 2010

### maverick280857

Hi,

I have a question from Perkins:

I'm not sure I understand the line in boldface. If $s_\pi = 1$ then why is $S_z = 0$?

Thanks!

2. Feb 5, 2010

### xepma

Conservation of angular momentum. two is larger than one!

3. Feb 5, 2010

### maverick280857

Yes. Right, but does Sz = 0 explicitly conserve angular momentum? How do I convince myself?