- #1
Einj
- 470
- 59
Hi everyone. I'm studying Heavy Quark Effective Theory and I have some problems in proving an equality. I'm am basically following Wise's book "Heavy Quark Physics" where, in section 4.1, he claims the following identity:
$$
\bar Q_v\sigma^{\mu\nu}v_\mu Q_v=0
$$
Does any of you have an idea why this is true??
I think that an important identity to use in order to prove that should be [itex]Q_v=P_+Q_v[/itex], where [itex]P_\pm=(1\pm \displaystyle{\not} v)/2[/itex] are projection operators.
Thanks a lot
$$
\bar Q_v\sigma^{\mu\nu}v_\mu Q_v=0
$$
Does any of you have an idea why this is true??
I think that an important identity to use in order to prove that should be [itex]Q_v=P_+Q_v[/itex], where [itex]P_\pm=(1\pm \displaystyle{\not} v)/2[/itex] are projection operators.
Thanks a lot