Spontaneous Lorentz violation: the case of infrared QED A. P. Balachandran, S. Kürkçüoǧlu, A. R. de Queiroz and S. Vaidya Eur. Phys. J. C, 75 2 (2015) 89 Published online: 24 February 2015 DOI: 10.1140/epjc/s10052-015-3305-0