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arXiv · 2507.14055

Mixed gauge-gravity term and proper time

J. R. Nascimento·M. Paganelly·A. Yu. Petrov·P. Porfirio
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Abstract

We consider the four-dimensional action of spinors minimally coupled to a $U(1)$-gauge field in an Riemann-Cartan background. In this theory, we integrate over the spinors and study the resulting one-loop gauge-gravity effective action, paying special attention to the contributions that depend on both the gauge field and the torsion. We explicitly calculate the gauge-torsion term, which turns out to be finite, and comment on possible terms depending simultaneously on torsion, curvature, and gauge field.

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J. R. Nascimento, M. Paganelly, A. Yu. Petrov, P. Porfirio. 2025-07-18. Mixed gauge-gravity term and proper time. https://doi.org/10.1016/j.physletb.2025.139956

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