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arXiv · 1710.00750

New test of Lorentz symmetry using ultrahigh-energy cosmic rays

Luis A. Anchordoqui·Jorge F. Soriano
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Abstract

We propose an innovative test of Lorentz symmetry by observing pairs of simultaneous parallel extensive air showers produced by the fragments of ultrahigh-energy cosmic ray nuclei which disintegrated in collisions with solar photons. We show that the search for a cross-correlation of showers in arrival time and direction becomes background free for an angular scale < 3^\circ and a time window {\cal O}(10 s). We also show that if the solar photo-disintegration probability of helium is {\cal O} (10^{-5.5}) then the hunt for spatiotemporal coincident showers could be within range of existing cosmic ray facilities, such as the Pierre Auger Observatory. We demonstrate that the actual observation of a few events can be used to constrain Lorentz violating dispersion relations of the nucleon.

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Luis A. Anchordoqui, Jorge F. Soriano. 2018-02-01. New test of Lorentz symmetry using ultrahigh-energy cosmic rays. https://doi.org/10.1103/physrevd.97.043010

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