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Comment: 29 pages, 2 figures; published version, new addendum
Comment: 6 pages, 7 figures
Comment: 53 pp; 6 figs; added table of contents, references, fixed typos
We show that coupling the Standard Model to a Lorentz symmetry violating sector may co-exist with viable phenomenology, provided that the interaction between the two is mediated by higher-dimensional operators. In particular, if the new sector acquires anisotropic scaling behavior above a "Horava-Lifshitz" energy scale L_HL and couples to the Standard Model through interactions suppressed by M_P, the transmission of the Lorentz violation into the Standard Model is protected by the ratio L_HL^2/M_P^2. A wide scale separation, L_HL<
Comment: 31 pages, 2 figures; v2: 2 refs and comments added; some discussions moved to appendices; v3: further minor improvements
Comment: 46 pages, 8 figures, some typos fixed and references added
Comment: 22 pages, 3 figures, Boundary conditions clarified, some typos fixed, presentations improved and references added
Comment: 17 pages, 9 figures; v2 references with comments added; v3 two references added, JHEP version
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