Jul 24 – 28, 2017
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Solar neutrino flux at keV energies

Jul 26, 2017, 4:00 PM
FA055 and FA056

FA055 and FA056

Contributed talk Neutrinos Neutrino Parallel


Mr Edoardo Vitagliano (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut))


We calculate the solar neutrino and antineutrino flux in the keV energy range. The dominant thermal source processes are photo production (γe → eνν ̄), bremsstrahlung (e + Ze → Ze + e + νν ̄), plasmon decay (γ → νν ̄), and pair emission in free-bound and bound-bound transitions of partially ionized elements heavier than hydrogen and helium. To calculate the latter we use libraries of monochromatic photon radiative opacities in analogy to a previous calculation of solar axion emission. Our overall flux and many details differ significantly from previous works. While this low-energy flux is not measurable with present- day technology, it could become a significant background for future direct searches for keV- mass sterile neutrino dark matter.

Primary author

Mr Edoardo Vitagliano (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut))


Dr Javier Redondo (University of Zaragoza) Prof. Georg Raffelt (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut))

Presentation materials