Recent content by lihurricane

Thank you very much! i think it will help me.

i have met a problem about the commutator of x and p. [x,p]=ihbar /p> is the eigenstate of momentum operator p. <p/xp-px/p> =<p/xp/p>-<p/px/p> =p<p/x/p>-p<p/x/p> the second term is got by the momentum operator p acting on the left state. =0...

recently i am reading chiral symmetry in QFT. Almost all textbooks define γ5 as a chiral operator without saying some reasons. i am very confused why γ5 has something to do with chiral symmetry, can somebody explain it more intuitively and physically? who first introduce γ5 as a chiral...