Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1999-04-27
Phys.Rev. D63 (2001) 048501
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4p, latex, Comment to appear in Phys Rev, references updated
Scientific paper
10.1103/PhysRevD.63.048501
In Riemann-Cartan spacetimes with torsion only its axial covector piece $A$ couples to massive Dirac fields. Using renormalization group arguments, we show that besides the familiar Riemannian term only the Pontrjagin type four-form $dA\wedge dA$ does arise additionally in the chiral anomaly, but not the Nieh-Yan term $d^\star A$, as has been claimed in a recent paper [PRD 55, 7580 (1997)].
Kreimer Dirk
~Mielke Eckehard W.
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