In a comment http://ift.tt/1wiX6DH to Motl's blog, there are some reference to "chiral leptoquarks".
I am guessing that this is an object which is not a Dirac fermion, ie it only exists one of the two chiral components of it.
If it is so, can this fermion have QCD and fermion electromagnetic vertices? Because if it is, say, charge -1/3 spin +1/2 and it emits a photon, it should change to spin -1/2 and still have the same charge, shouldn't it?
I am guessing that this is an object which is not a Dirac fermion, ie it only exists one of the two chiral components of it.
If it is so, can this fermion have QCD and fermion electromagnetic vertices? Because if it is, say, charge -1/3 spin +1/2 and it emits a photon, it should change to spin -1/2 and still have the same charge, shouldn't it?
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