2016 Fiscal Year Final Research Report
Neutrino physics with very low energy processes
| Project/Area Number |
25400257
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
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| Research Institution | Osaka University |
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Principal Investigator |
Tanaka Minoru 大阪大学, 理学研究科, 助教 (70273729)
|
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| Project Period (FY) |
2013-04-01 – 2017-03-31
|
| Keywords | atomic neutrino / cosmic neutrino / coherence / photonic crystals |
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| Outline of Final Research Achievements |
We studied radiative emission of neutrino pair (RENP) from atoms/molecules. To prove macrocoherent enhancement, which is necessary to observe RENP, we investigated a companion process, paired superradiance (PSR), in which the neutrino pair in RENP is replaced by a photon, and observed an amplification of eighteen digits in our PSR experiment of para-hydrogen. We also examined a macrocoherent QED three-photon process (McQ3), which is the most important background process of RENP, and showed that McQ3 could be suppressed by using a photonic crystal. In addition, effects of the cosmic neutrino background (CNB) on RENP were studied and we found that the nature of CNB such as its temperature could be determined by observing RENP spectra.
|
| Free Research Field |
particle physics
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