2014/04/02 by Benjamin R. Safdi, Mariangela Lisanti, J. Spitz +3
Physics and Astronomy · #Amplitude #Astrophysics #Astrophysics and Cosmic Phenomena #COSMIC cancer database #Cosmic neutrino background #Dark Matter and Cosmic Phenomena #Measurements of neutrino speed #Neutrino #Neutrino Physics Research #Neutrino oscillation #Optics #Particle physics #Physics #Solar neutrino #Universe #astro-ph.CO #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.90.043001
published as Phys. Rev. D 90, 043001 (2014) · 6 pages, 2 figures
arxiv created 2014/04/02 · openalex publication_date 2014/08/01 · arxiv updated 2014/08/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The cosmic neutrino background (C\ensuremathνB), produced about one second after the big bang, permeates the Universe today. New technological advancements make neutrino capture on beta-decaying nuclei (NCB) a clear path forward towards the detection of the C\ensuremathνB. We show that gravitational focusing by the Sun causes the expected neutrino capture rate to modulate annually. The amplitude and phase of the modulation depend on the phase-space distribution of the local neutrino background, which is perturbed by structure formation. These results also apply to searches for sterile neutrinos at NCB experiments. Gravitational focusing is the only source of modulation for neutrino capture experiments, in contrast to dark-matter direct-detection searches where the Earth's time-dependent velocity relative to the Sun also plays a role.