Experimental method of detecting relic neutrino by atomic de-excitation

M. Yoshimura; N. Sasao; M. Tanaka

doi:10.1103/PhysRevD.91.063516

Experimental method of detecting relic neutrino by atomic de-excitation

M. Yoshimura, N. Sasao, M. Tanaka

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9 Citations (Scopus)

Abstract

The cosmic background neutrino of temperature 1.9 K affects rates of radiative emission of neutrino pairs (RENP) from metastable excited atoms, since its presence blocks the pair emission by the Pauli exclusion principle. We quantitatively investigate how the Pauli blocking distorts the photon energy spectrum and calculate its sensitivity to cosmic parameters such as the neutrino temperature and its chemical potential. Important quantities for high sensitivities to these parameter measurements are found to be the level spacing of atomic deexcitation and the unknown mass value of the lightest neutrino, in particular, their relationship to one another.

Original language	English
Article number	063516
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	91
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.91.063516
Publication status	Published - Mar 9 2015

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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N2 - The cosmic background neutrino of temperature 1.9 K affects rates of radiative emission of neutrino pairs (RENP) from metastable excited atoms, since its presence blocks the pair emission by the Pauli exclusion principle. We quantitatively investigate how the Pauli blocking distorts the photon energy spectrum and calculate its sensitivity to cosmic parameters such as the neutrino temperature and its chemical potential. Important quantities for high sensitivities to these parameter measurements are found to be the level spacing of atomic deexcitation and the unknown mass value of the lightest neutrino, in particular, their relationship to one another.

AB - The cosmic background neutrino of temperature 1.9 K affects rates of radiative emission of neutrino pairs (RENP) from metastable excited atoms, since its presence blocks the pair emission by the Pauli exclusion principle. We quantitatively investigate how the Pauli blocking distorts the photon energy spectrum and calculate its sensitivity to cosmic parameters such as the neutrino temperature and its chemical potential. Important quantities for high sensitivities to these parameter measurements are found to be the level spacing of atomic deexcitation and the unknown mass value of the lightest neutrino, in particular, their relationship to one another.

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Experimental method of detecting relic neutrino by atomic de-excitation

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