CERN Accelerating science

Article
Report number	arXiv:1807.05155 ; KCL-PH-TH/2018-37 ; CERN-TH/2018-166 ; KCL-PH-TH-2018-37 ; CERN-TH-2018-166
Title	Limits on Neutrino Lorentz Violation from Multimessenger Observations of TXS 0506+056
Author(s)	Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Mavromatos, Nikolaos E. (King's Coll. London) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K. (CERN ; Texas U., Arlington)
Publication	2019-02-10
Imprint	2018-07-13
Number of pages	4
Note	11 pages, no figures, version accepted for publication in PLB
In:	Phys. Lett. B 789 (2019) 352-355
DOI	10.1016/j.physletb.2018.11.062 (publication)
Subject category	hep-th ; Particle Physics - Theory ; hep-ph ; Particle Physics - Phenomenology ; gr-qc ; General Relativity and Cosmology ; astro-ph.CO ; Astrophysics and Astronomy ; astro-ph.HE ; Astrophysics and Astronomy
Abstract	The observation by the IceCube Collaboration of a high-energy ($E \gtrsim 200$ TeV) neutrino from the direction of the blazar TXS 0506+056 and the coincident observations of enhanced $\gamma$-ray emissions from the same object by MAGIC and other experiments can be used to set stringent constraints on Lorentz violation in the propagation of neutrinos that is linear in the neutrino energy: $\Delta v = - E/M_1$, where $\Delta v$ is the deviation from the velocity of light, and $M_1$ is an unknown high energy scale to be constrained by experiment. Allowing for a difference in neutrino and photon propagation times of $\sim 10$ days, we find that $M_1 \gtrsim 3 \times 10^{16}$ GeV. This improves on previous limits on linear Lorentz violation in neutrino propagation by many orders of magnitude, and the same is true for quadratic Lorentz violation.
Copyright/License	publication: (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0) The Authors

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