Solar Neutrino Background in Neutrinoless double beta-decay searching for experiments

Abstract

Background of germanium and xenon detectors due to the elastic scattering of ${}^{8}B$ solar neutrinos on electrons have been calculated. The background is 4.6 \times $10^{-4}$ counts/(keV$\cdot t\cdot$y) that defines the sensitivity of double beta-decay experiments at a level $T_{1/2}^{0\nu \beta \beta }\approx 4\times$10^{27}$yranditcorrespondstoeffectivemajoranamass$ \mid < m_{\nu_e}>\mid \approx 23.5$ meV. This limit after a half of one year of measurements for 10 tons natural Xe detector will be obtained.

Comments: 3 pages, 2 figures Talk given at LIV International Meeting on Nuclear Spectroscopy and Nuclear Structure "NUCLEUS-2004" June 22-25, 2004, Belgorod, Russia Section #6 Fundamental Interactions in Nuclear Physics Formula correction