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Apparent superluminal neutrino propagation caused by nonlinear coherent interactions in matter
Brustein R., Semikoz D.V.
Physics Letters B 706 (2012) 462-464 - http://hal.archives-ouvertes.fr/hal-00713440
Physique/Astrophysique/Phénomènes cosmiques de haute energie
Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
Apparent superluminal neutrino propagation caused by nonlinear coherent interactions in matter
R. Brustein1, D.V. Semikoz2
1 :  Department of Physics, Ben-Gurion University
Ben-Gurion University of the Negev
Beer-Sheva 84105
2 :  APC - UMR 7164 - AstroParticule et Cosmologie
CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13
Quantum coherence can significantly increase the strength of the forward scattering of neutrinos propagating through the Earth and interacting with matter. The index of refraction of the neutrinos propagating in a medium and hence their phase velocity is determined by the forward scattering. So, depending on the nature of the interaction of neutrinos with matter, their phase velocity can be larger than the speed of light in vacuum. We show that such effects can explain the apparent superluminal propagation of muon neutrinos found recently by the OPERA experiment. Our proposal explains why the neutrino oscillations and the propagation of neutrinos from supernova 1987A are unaffected. It can be verified by changing the amount of neutrino coherence or by changing the composition of matter in which they propagate.

Physics Letters B (Phys. Lett. B)
Publisher Elsevier
ISSN 0370-2693 
Articles dans des revues avec comité de lecture

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