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Search for Neutrino D ecay

Search for Neutrino D ecay. Univ. of Tsukuba, JAXA/ISAS, Okayama Univ., Fukui Univ., Kinki Univ., KEK, Seoul National Univ., Fermilab. Expected spectrum for. Search for in cosmic neutrino background (CNB) Direct detection of CNB Direct m easurement of neutrino mass

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Search for Neutrino D ecay

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  1. Search for Neutrino Decay Univ. of Tsukuba, JAXA/ISAS, Okayama Univ., Fukui Univ., Kinki Univ., KEK, Seoul National Univ., Fermilab Expected spectrum for • Search for in cosmic neutrino background (CNB) • Direct detection of CNB • Direct measurement of neutrino mass • Aiming at sensitivity of detecting from decay for • Current lower limit • SM expectation • L-R symmetric model predicts dN/dE(A.U.) Sharp edge with 1.9K smearing Red shift effect I-V curve for Hf-STJ in development • Requirements for detector • Energy measurement for single photon with better than 2% resolution for (, far infrared photon) • Rocket and satellite experiment with this detector • Superconducting Tunneling Junction (STJ) detectors in development • Array of 50 Nb/Al-STJ cell with diffraction grating covering • For rocket experiment aimed at launching in 2016 in earliest, aiming at improvement of lower limit for by 2 order • STJ using Hafnium: Hf-STJ for satellite experiment (after 2020) I: /DIV V: /DIV T120mK B=0 World’s first evidence of Josephson junction withHf-HfOx-Hf structure

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