Left and right-handed Weyl spinors

[goronx]

Hi, I'm new on this forum.

I have a doubt regarding helicity and Weyl spinors: I can't understand when I have to use left or right-handed Weyl spinors in order to describe particles or antiparticles.

What i have understood is that a charged current is described by left-handed Weyl fields: in this case a particle has helicity h=-1/2 and an antiparticle has h=+1/2.
On the contrary a neutral current is a mix of left-handed and right-handed Weyl fields, so that I can't say anything about particle's and antiparticle's helicity, isn'it?

I have also a kind of homework, but I'll post it in the appropriate section of the forum. Thanks.

 

[goronx]

I can try to be more explicit: my problem is that I don't understand how Weyl field can be used to describe particles and antiparticles and obtain information about their helicity.
Theoretically is it clear what a Weyl field is but I can't see how they are used in practice.

 

[goronx]

No one?

 

[Avodyne]

There is a discussion of this in Srednicki's text, I believe in the chapter about anomalies.

 

[goronx]

Thanks, it's seems to be useful for my purpose.