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Interactions of keV sterile neutrinos with matter

Ando, Shin’ichiro and Kusenko, Alexander (2010) Interactions of keV sterile neutrinos with matter. Physical Review D, 81 (11). Art. No. 113006 . ISSN 2470-0010.

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A sterile neutrino with mass of several keV is a well-motivated dark-matter candidate, and it can also explain the observed velocities of pulsars via anisotropic emission of sterile neutrinos from a cooling neutron star. We discuss the interactions of such relic particles with matter and comment on the prospects of future direct detection experiments. A relic sterile neutrino can interact, via sterile–active mixing, with matter fermions by means of electroweak currents, with the final state containing a relativistic active neutrino. The recoil momentum impacted onto a matter fermion is determined by the sterile neutrino mass and is enough to ionize atoms and flip the spins of nuclei. While this suggests a possibility of direct experimental detection, we calculate the rates and show that building a realistic detector of the required size would be a daunting challenge.

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Additional Information:© 2010 The American Physical Society. Received 28 January 2010; published 18 June 2010. The work of S. A. was supported by Japan Society for Promotion of Science. The work of A. K. was supported by DOE Grant No. DE-FG03-91ER40662 and NASA ATFP Grant No. NNX08AL48G.
Funding AgencyGrant Number
Japan Society for Promotion of ScienceUNSPECIFIED
Department of Energy (DOE)DE-FG03-91ER40662
NASA Astrophysics Theory and Fundamental Physics program (ATFP)NNX08AL48G
Issue or Number:11
Classification Code:PACS: 14.60.St, 95.35.+d
Record Number:CaltechAUTHORS:20100709-113928337
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18968
Deposited By: Tony Diaz
Deposited On:09 Jul 2010 20:35
Last Modified:03 Oct 2019 01:50

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