Rocket experiment for Neutrino Decay Search Overview Yuji Takeuchi (Univ. of Tsukuba) Oct. 24, 2013 Neutrino Decay collaboration meeting 1.

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Presentation transcript:

Rocket experiment for Neutrino Decay Search Overview Yuji Takeuchi (Univ. of Tsukuba) Oct. 24, 2013 Neutrino Decay collaboration meeting 1

Collaboration Members (Japan-US collab.: Search for Neutrino Decay) As of Oct Japan Group Shin-Hong Kim, Yuji Takeuchi, Kenji Kiuchi, Kanai, Kazuki Nagata, Kota Kasahara, Ryuuya Ichimura, Takuya Okudaira, Kouya Moriuchi, Ren Senzaki (University of Tsukuba), Hirokazu Ikeda, Shuji Matsuura, Takehiko Wada (JAXA/ISAS), Hirokazu Ishino, Atsuko Kibayashi, Yasuki Yuasa(Okayama University), Takuo Yoshida, Shota Komura, Ryuta Hirose(Fukui University), Satoshi Mima (RIKEN), Yukihiro Kato (Kinki University), Masashi Hazumi, Yasuo Arai (KEK) US Group Erik Ramberg, Mark Kozlovsky, Paul Rubinov, Dmitri Sergatskov, Jonghee Yoo (Fermilab) Korea Group Soo-Bong Kim (Seoul National University) 2

3

Motivation LRS: SU(2) L ｘSU(2) R ｘU(1) B-L 4 SM: SU(2) L ｘ U(1) Y enhancement to SM PRL 38,(1977)1252, PRD 17(1978)1395

Photon Energy in Neutrino Decay m 3 =50meV m 1 =1meV m 2 =8.7meV E  =4.4meV E  =24meV Sharp Edge with 1.9K smearing Red Shift effect dN/dE(A.U.) 5

6 Zodiacal LightZodiacal Emission Galactic dust emission Wavelength[  m] Integrated flux from galaxy counts Galaxy evolution model CIB measurements(  AKARI,  COBE) Astrophys. J. 737 (2011) 2 Sharp edge with 1.9K smearing and energy resolution of a detector(0%-5%) Red shift effect CIB (fit from COBE data) C B decay 6.7  away from flat

Neutrino lifetime lower limit from AKARI data x10 12 yr Published in Jan AKARI CIB data after subtracting foregrounds

Detector requirements 8

9 Zodiacal LightZodiacal Emission Galactic dust emission Wavelength[  m] Integrated flux from galaxy counts Galaxy evolution model CIB measurements(  AKARI,  COBE) Astrophys. J. 737 (2011) 2

FIR photon spectroscopy with diffraction grating + Nb/Al-STJ array Nb/Al-STJ array 10

赤外線観測ロケットによる宇宙背景ニュートリノ崩壊探索 LHe 減圧 1.6K 分光・光学系 DAQ 3 He 減圧 <0.9K 11

Backup 12

Energy/Wavelength/Frequency 13

Feasibility of FIR single photon detection 14

Feasibility of VIS/NIR single photon detection 15

CIB Experiment for Neutrino Decay Search with JAXA Rocket Rate Calculation and Expected Lifetime Limit 黄道光（前景放射）系外銀河第一世代の星 ? 背景放射 CMB DG L FIR-rocket λ ＝ 40 ～ 80μm