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Neutrino mass from bremsstrahlung endpoint in coherent scattering on nuclei
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 42018 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 98, no 12, article id 123006Article in journal (Refereed) Published
Abstract [en]

We calculate the coherent bremsstrahlung process nu + N -> N + nu + gamma off a nucleus H with the aim of revealing the neutrino mass via the photon endpoint spectrum. Unfortunately, the large required power of a monochromatic neutrino source and/or large detector mass make it difficult to compete with traditional electron-spectrum endpoint measurements in nuclear beta decay. Our neutral-current process distinguishes between Dirac and Majorana neutrinos, but the change of the photon spectrum is of the order of m(nu)/E-nu and thus very small, despite the final-state neutrino coming to rest at the photon endpoint. So the Dirac-Majorana confusion theorem remains intact even if E-nu >> m(nu) my applies only for the initial state.

Place, publisher, year, edition, pages
2018. Vol. 98, no 12, article id 123006
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-163692DOI: 10.1103/PhysRevD.98.123006ISI: 000452689300005OAI: oai:DiVA.org:su-163692DiVA, id: diva2:1280272
Available from: 2019-01-18 Created: 2019-01-18 Last updated: 2019-01-18Bibliographically approved

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Millar, Alexander
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