Quantum gravity corrections to neutrino propagation

Massive spin-1/2 fields are studied in the framework of loop quantum gravity by considering a state approximating, at a length scale L much greater than Planck length l(P), a spin-1/2 field in flat spacetime. The discrete structure of spacetime at l(P) yields corrections to the field propagation at...

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Published in:Physical review letters 2000-03, Vol.84 (11), p.2318-2321
Main Authors: Alfaro, J, Morales-Tecotl, HA, Urrutia, LF
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description Massive spin-1/2 fields are studied in the framework of loop quantum gravity by considering a state approximating, at a length scale L much greater than Planck length l(P), a spin-1/2 field in flat spacetime. The discrete structure of spacetime at l(P) yields corrections to the field propagation at scale L. Neutrino bursts ( approximately 10(5) GeV) accompanying gamma ray bursts that have traveled cosmological distances L are considered. The dominant correction is helicity independent and leads to a time delay of order ( l(P))L/c approximately 10(4) s. To next order in l(P), the correction has the form of the Gambini and Pullin effect for photons. A dependence L(-1)(os) approximately (2)l(P) is found for a two-flavor neutrino oscillation length.
doi_str_mv 10.1103/PhysRevLett.84.2318
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title Quantum gravity corrections to neutrino propagation
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