*-Wars Episode I: The Phantom Anomaly

Details *-Wars Episode I: The Phantom Anomaly *-Wars Episode I: The Phantom Anomaly

2001-07-23

arxiv.org/abs/hep-th/0107199v3

Nucl.Phys. B620 (2002) 315-330

Physics

High Energy Physics

High Energy Physics - Theory

20 pages. Added references and minor typos corrected

Scientific paper

10.1016/S0550-3213(01)00555-7

As pointed out, chiral non-commutative theories exist, and examples can be constructed via string theory. Gauge anomalies require the matter content of individual gauge group factors, including U(1) factors, to be non-chiral. All ``bad'' mixed gauge anomalies, and also all ``good'' (e.g. for $\pi ^0\to \gamma \gamma$) ABJ type flavor anomalies, automatically vanish in non-commutative gauge theories. We interpret this as being analogous to string theory, and an example of UV/IR mixing: non-commutative gauge theories automatically contain ``closed string,'' Green-Schwarz fields, which cancel these anomalies.

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