CERN Accelerating science

Article
Report number	arXiv:0904.1089 ; IPPP-09-27 ; DCPT-09-54 ; IPPP-09-27 ; DCPT-09-54
Title	Measuring neutrino mass with radioactive ions in a storage ring
Author(s)	Lindroos, Mats (CERN) ; McElrath, Bob (CERN) ; Orme, Christopher (CERN ; Durham U., IPPP) ; Schwetz, Thomas (Heidelberg, Max Planck Inst.)
Publication	2009
Imprint	08 Apr 2009
Number of pages	20
Note	Comments: 20 pages, 8 figures
In:	Eur. Phys. J. C 64 (2009) 549-560
DOI	10.1140/epjc/s10052-009-1168-y
Subject category	Particle Physics - Phenomenology
Abstract	We propose a method to measure the neutrino mass kinematically using beams of ions which undergo beta decay. The idea is to tune the ion beam momentum so that in most decays, the electron is forward moving with respect to the beam, and only in decays near the endpoint is the electron moving backwards. Then, by counting the backward moving electrons one can observe the effect of neutrino mass on the beta spectrum close to the endpoint. In order to reach sensitivities for $m_\nu < 0.2$ eV, it is necessary to control the ion momentum with a precision better than $\delta p/p < 10^{-5}$, identify suitable nuclei with low Q-values (in the few to ten keV range), and one must be able to observe at least O($10^{18}$) decays.

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