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arxiv 2109.07482 v2 pith:QUTL4NCD submitted 2021-09-15 hep-ph hep-ex

Updated detection prospects for relic neutrinos using coherent scattering

classification hep-ph hep-ex
keywords neutrinoscoherentexistingneutrinorelicscatteringmassproposals
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We review the existing proposals to detect relic neutrinos using the coherent scattering of a neutrino wind on a test mass. By considering the transformation of the neutrino momentum between reference frames, we demonstrate that the induced acceleration scales with the square of the neutrino mass for unclustered neutrinos, contrary to the existing literature. In addition, we show that there is a large contribution to this effect from coherent neutrino-electron scattering, which can exceed the neutrino-nucleus component by nearly an order of magnitude. Unfortunately, we find that even with this enhancement there are no existing experiments or proposals capable of detecting relic neutrinos using this method.

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  1. Pathways and impediments towards a detection of the relic neutrino wind

    hep-ph 2026-07 accept novelty 6.0

    Detecting the cosmic neutrino background's dipole anisotropy via tritium capture requires ~10^5 times the exposure needed for flux detection, with Majorana neutrinos suffering an additional (m_ν/T_ν)^2 suppression.