2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/181782Pulsars are the most accurate naturally occurring clocks, and data about them can be used to set bounds on neutron-sector Lorentz violations. If SO(3) rotation symmetry is completely broken for neutrons, then pulsars' rotation speeds will vary periodically. Pulsar timing data limits the relevant Lorentz-violating coefficients to be smaller than 1.7 x 10^(-8) at at least 90% confidence.10 pages, version to appear in Phys. Rev. DHigh Energy Physics - PhenomenologyAstrophysicsHigh Energy Physics - Theorytext