- #1
Xico Sim
- 43
- 4
Hi, guys.
This is actually a question about quantum mechanics, but since the context in which it appeared is particle physics, I'll post it here.
On Thompson's book (page 227, equation (9.32)), we have
$$T_+ |d\bar{u}\rangle = |u\bar{u}\rangle - |d\bar{d}\rangle$$
But I thought ##T_+=T_+(1)\otimes T_+(2)##, and in that case
$$T_+ |d\bar{u}\rangle = -|u\bar{d}\rangle$$
It seems like he uses ##T_+=T_+(1) + T_+(2)##, and I don't know why he does that.
This is actually a question about quantum mechanics, but since the context in which it appeared is particle physics, I'll post it here.
On Thompson's book (page 227, equation (9.32)), we have
$$T_+ |d\bar{u}\rangle = |u\bar{u}\rangle - |d\bar{d}\rangle$$
But I thought ##T_+=T_+(1)\otimes T_+(2)##, and in that case
$$T_+ |d\bar{u}\rangle = -|u\bar{d}\rangle$$
It seems like he uses ##T_+=T_+(1) + T_+(2)##, and I don't know why he does that.