Diffuse Ultra-High Energy Neutrino Fluxes and Physics Beyond the Standard Model

Details Diffuse Ultra-High Energy Neutrino Fluxes and Physics Beyond the Standard Model Diffuse Ultra-High Energy Neutrino Fluxes and Physics Beyond the Standard Model

2009-10-23

arxiv.org/abs/0910.4396v3

Physics Letters B Volume 690, Issue 1, 7 June 2010, Pages 42-47

Physics

High Energy Physics

High Energy Physics - Phenomenology

v1: 5 pages, 3 figures v2: One new figure and related discussion added, references added v3: Published version. 7 pages, 5 fig

Scientific paper

10.1016/j.physletb.2010.04.078

We study spectral distortions of diffuse ultra-high energy (UHE) neutrino flavour fluxes resulting due to physics beyond the Standard Model (SM). Even large spectral differences between flavours at the source are massaged into a common shape at earth by SM oscillations, thus, any significant observed spectral differences are an indicator of new physics present in the oscillation probability during propagation. Neutrino decay and Lorentz symmetry violation (LV) are examples, and result in significant distortion of the fluxes and the well-known bounds on them, which may allow UHE detectors to probe lifetimes, the mass hierarchy and LV parameters over a broad range.

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