@article{f8afb67264a8489984368b4099dac0ab,
title = "Lorentz invariance and quantum gravity: An additional fine-tuning problem?",
abstract = "The elementary particle interactions with a Planck-scale preferred frame, which gives rise to Lorentz violation and are unnaturally strongly fine tuned, were investigated. It was found that direct investigations of Planck-scale phenomena need short-wavelength probes with elementary-particle energies of order the Planck energy Ep = (hc5/G)1/2 = 1.2 x 1019 GeV. The preferred frame and the consequent Lorentz violation occurred even though the fundamental classical equations of both of the theories were locally Lorentz invariant. The results show that the Lorentz violation can be removed by explicit Lorentz-violating counterterms that are fine tuned to give the observed low-energy Lorentz invariance.",
author = "John Collins and Alejandro Perez and Daniel Sudarsky and Luis Urrutia and H{\'e}ctor Vucetich",
note = "Funding Information: We would like to thank A. Ashtekar, J. Banavar, ?>O. Bertolami, C. Burgess, Y. Chen, L. Freidel, ?>L. Frankfurt, M. Graesser, A. Guijosa, J. Hall, ?>T. Jacobson, J. Jain, C. Kozameh, A. Kosteleck{\'y}, ?>R. Montemayor, M. Mondrag{\'o}n, H.A. Morales-T{\'e}cotl, H. Sahlmann, C. Stephens, and M. Strikman for useful discussions and comments. J. C. was supported in part by the U.S. Department of Energy. L. F. U. acknowledges support from Projects No. DGAPA-IN11700 and No. CONACYT-40745-F. D. S. acknowledges support from the Projects No. DGAPA-IN112401 and No. IN108103-3 and from CONACyT. A. P. acknowledges support from NSF Grant No. PHY-0090091 and the Eberly Research Funds of Penn State University. ",
year = "2004",
month = nov,
day = "5",
doi = "10.1103/PhysRevLett.93.191301",
language = "English (US)",
volume = "93",
pages = "191301--1--191301--4",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "19",
}