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arXiv · hep-th/9212042

Quark Spin and the Theta-Term for the QCD String

J. Pawelczyk
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Abstract

We describe a way in which spin of quarks can enter a consistent QCD string theory. We show that the spin factor of the 4d massless, spin 1/2 fermions is related to the self-intersection number of a 2d surfaces immersed in the 4d space. We argue that the latter quantity should appear in a consistent description of the QCD string. We also calculate the chiral anomaly and show that the self-intersection number corresponds to the topological charge $F{\tilde F}$ of QCD.

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J. Pawelczyk. 1992-12-08. Quark Spin and the Theta-Term for the QCD String. https://doi.org/10.1016/0370-2693(93)90540-x

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