https://hackerpaper.kaipfister.de/p/0905.0031/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=13249031urn:hackerpapers:mention:0905.0031:13249031Sat, 24 Dec 2016 07:53:14 GMT<p>That&#x27;s true for the Lagrangian written down in the excellent answer at stackexchange, but the equivalent Lagrangian of the Standard Model Extension (SME) (which is what is the topic of the Bourgoin et al. paper) is filled with additional terms. For example, a minimal SME photon Lagrangian is developed in section II. A. of Kostelcky and Mewes @ https://arxiv.org/abs/0905.0031 The difference between a minimal SME (mSME) and the full SME is that the latter admits terms of any mass dimension greater than two, while mSME requires power-counting renormalizability (in order to be an effective field…</p><p><a href="https://hackerpaper.kaipfister.de/p/0905.0031/">Paper and discussion history</a>. A mention is not an endorsement.</p>hep-ph