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Zeev Vager
What are the references (published journals) for the following:

Unfortunately this argument is not true since the weak-interaction current is precisely of (V-A) form, i.e., you subtract the axial-vector from the vector current. Of course, your argument is true, when considering only parity-conserving interactions (strong, electromagnetic). Further, in relativistic quantum mechanics there is no unique frame-independent splitting of orbital angular momentum and spin. Thus it is not easy to answer the question within relativistic theory, but of course total angular momentum must be an axial vector.
 

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As an answer to the question 'why we know spin vector is an axial vector' https://www.physicsforums.com/members/vanhees71.260864/ answer is:
Unfortunately this argument is not true since the weak-interaction current is precisely of (V-A) form, i.e., you subtract the axial-vector from the vector current. Of course, your argument is true, when considering only parity-conserving interactions (strong, electromagnetic).

Further, in relativistic quantum mechanics there is no unique frame-independent splitting of orbital angular momentum and spin. Thus it is not easy to answer the question within relativistic theory, but of course total angular momentum must be an axial vector.
I need references to publications supporting that answer.
 
Zeev Vager said:
As an answer to the question 'why we know spin vector is an axial vector

If you want to post a response in a thread, you should post it in the thread. You don't need to start a new thread, and certainly not in this forum, which is for new member introductions, not for responding to existing threads.

Or, since the thread you are asking about is 6 years old, you can PM the author of the post you have questions about, as @mfb suggested.

This thread is closed.