Low energy bounds on Poincare violation in causal set theory

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dc.creatorKaloper, Nemanja
dc.creatorMattingly, David
dc.date2006-07-20
dc.date2006-10-20
dc.date.accessioned2026-07-07T10:23:20Z
dc.date.available2026-07-07T10:23:20Z
dc.descriptionIn the causal set approach to quantum gravity, Poincaré symmetry is modified by swerving in spacetime, induced by the random lattice discretization of the space-time structure. The broken translational symmetry at short distances is argued to lead to a residual diffusion in momentum space, whereby a particle can acquire energy and momentum by drift along its mass shell and a system in equilibrium can spontaneously heat up. We consider bounds on the rate of momentum space diffusion coming from astrophysical molecular clouds, nuclear stability and cosmological neutrino background. We find that the strongest limits come from relic neutrinos, which we estimate to constrain the momentum space diffusion constant by $k < 10^{-61} {\rm GeV}^3$ for neutrinos with masses $m_ν> 0.01 {\rm eV}$, improving the previously quoted bounds by roughly 17 orders of magnitude.
dc.descriptionAdditional discussion about behavior of alpha particles in nuclei added. Version matches that accepted in PRD
dc.identifierhttps://arxiv.org/abs/astro-ph/0607485
dc.identifierhttp://arxiv.org/abs/astro-ph/0607485
dc.identifierPhys.Rev.D74:106001,2006
dc.identifierdoi:10.1103/PhysRevD.74.106001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175793
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleLow energy bounds on Poincare violation in causal set theory
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