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arXiv · 1012.0626

Quantum Gravitational Contributions to Gauge Field Theories

Yong Tang·Yue-Liang Wu
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Abstract

We revisit quantum gravitational contributions to quantum gauge field theories in the gauge condition independent Vilkovisky-DeWitt formalism based on the background field method. With the advantage of Landau-DeWitt gauge, we explicitly obtain the gauge condition independent result for the quadratically divergent gravitational corrections to gauge couplings. By employing, in a general way, a scheme-independent regularization method that can preserve both gauge invariance and original divergent behavior of integrals, we show that the resulting gauge coupling is power-law running and asymptotically free. The regularization scheme dependence is clarified by comparing with results obtained by other methods. The loop regularization scheme is found to be applicable for a consistent calculation.

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Yong Tang, Yue-Liang Wu. 2012-02-03. Quantum Gravitational Contributions to Gauge Field Theories. https://doi.org/10.1088/0253-6102%2F57%2F4%2F19

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