Precise Capture Rates of Cosmic Neutrinos and Their Implications on Cosmology

Abstract

We explore the potential of measurements of cosmological effects, such as neutrino spectral distortions from the neutrino decoupling and neutrino clustering in our Galaxy, via cosmic neutrino capture on tritium. We compute the precise capture rates of each neutrino species including such cosmological effects to probe them. These precise estimates of capture rates are also important in that the would-be deviation of the estimated capture rate could suggest new neutrino physics and/or a non-standard evolution of the universe. In addition, we discuss the precise differences between the capture rates of Dirac and Majorana neutrinos for each species, the required energy resolutions to detect each neutrino species and the method of reconstruction of the spectrum of cosmic neutrinos via the spectrum of emitted electrons, with emphasis on the PTOLEMY experiment.

arXiv comment35 pages, 4 figures and 5 tables. Version accepted for publication in EPJC

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Cited by in corpus (9)

• Cosmic Neutrino Background Detection in Large-Neutrino-Mass Cosmologies
• Relic neutrinos at accelerator experiments
• Neutrino capture on tritium as a probe of flavor vacuum condensate and dark matter
• Upper Limits on the Cosmic Neutrino Background from Cosmic Rays
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• Unstable Cosmic Neutrino Capture
• Probing sub-eV Dark Matter decays with PTOLEMY
• Studying Both the Universe and Neutrinos Themselves Using Cosmic and Astrophysical Neutrinos