It is hard to learn how gravity and electromagnetism couple

Yi Zen Chu, David M. Jacobs, Yifung Ng, Glenn D. Starkman

研究成果: 雜誌貢獻期刊論文同行評審

7 引文 斯高帕斯(Scopus)


We construct the most general effective Lagrangian coupling gravity and electromagnetism up to mass dimension 6 by enumerating all possible nonminimal coupling terms respecting both diffeomorphism and gauge invariance. In all, there are only two unique terms after field redefinitions: one is known to arise from loop effects in QED, while the other is a parity-violating term which may be generated by weak interactions within the standard model of particle physics. We show that neither the cosmological propagation of light nor, contrary to earlier claims, solar system tests of general relativity are useful probes of these terms. These nonminimal couplings of gravity and electromagnetism may remain a mystery for the foreseeable future.

期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
出版狀態已出版 - 16 9月 2010


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