2009/10/22 by Shin'ichiro Ando, Shin’ichiro Ando, Marc Kamionkowski +1 · 1 citation
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Electron neutrino #Lorentz covariance #Lorentz transformation #Measurements of neutrino speed #Neutrino #Neutrino Physics Research #Neutrino oscillation #Noncommutative and Quantum Gravity Theories #Particle physics #Physics #Quantum mechanics #Solar neutrino #Zenith #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.80.123522
published as Phys.Rev.D80:123522,2009 · 9 pages, 3 figures
arxiv created 2009/10/22 · openalex publication_date 2009/12/17 · arxiv updated 2010/04/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
If dark energy (DE) couples to neutrinos, then there may be apparent violations of Lorentz/CPT invariance in neutrino oscillations. The DE-induced Lorentz/CPT violation takes a specific form that introduces neutrino oscillations that are energy independent, differ for particles and antiparticles, and can lead to novel effects for neutrinos propagating through matter. We show that ultra-high-energy neutrinos may provide one avenue to seek this type of Lorentz/CPT violation in \ensuremathν_\ensuremathμ\mathrm\text\ensuremath-\ensuremathν_\ensuremathτ oscillations, improving the current sensitivity to such effects by 7 orders of magnitude. Lorentz/CPT violation in electron-neutrino oscillations may be probed with the zenith-angle dependence for high-energy atmospheric neutrinos. More compelling evidence for a DE-neutrino coupling would be provided by a dependence of neutrino oscillations on the direction of the neutrino momentum relative to our peculiar velocity with respect to the cosmic microwave background rest frame. While the amplitude of this directional dependence is expected to be small, it may nevertheless be worth seeking in current data and may be a target for future neutrino experiments.