Development of new scheme determine the neutrino mass using the technique of gravitational wave experiments

Research Project

Project/Area Number	25610046
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Particle/Nuclear/Cosmic ray/Astro physics
Research Institution	Tohoku University
Principal Investigator	ISHIDOSHIRO Koji 東北大学, ニュートリノ科学研究センター, 助教 (20634504)
Project Period (FY)	2013-04-01 – 2015-03-31
Project Status	Completed (Fiscal Year 2014)
Budget Amount *help	¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000) Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords	ニュートリノ / ねじれ振り子
Outline of Final Research Achievements	We developed the new scheme to determine the neutrino mass using the torsion-bar antenna and high power neutrino beam generated at J-PARC. Neutrino beam can transfer its momentum to the torsion-bar antenna as force vis neutral current interaction. Using the realistic parameter, we found that measurements of the neutrinos mass is much difficult using this scheme. Thus, we designed the new torsion-bar antenna based on cryogenically-cooled metal suspension. In addition, we set the new upper limits on gravitational wave background for 35-830mHz.