Search for neutrino d ecay
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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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Search for neutrino d ecay

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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