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Rate amplification of the two photon emission from para-hydrogen toward the neutrino mass measurement |
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| Authors: | Takahiko Masuda Hideaki Hara Yuki Miyamoto Susumu Kuma Itsuo Nakano Chiaki Ohae Noboru Sasao Minoru Tanaka Satoshi Uetake Akihiro Yoshimi Koji Yoshimura Motohiko Yoshimura |
| Institution: | 1. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan 2. Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan 3. School of Physics, Peking University, Chengfu Road, Haidian District, Beijing, 100871, China 4. Department of Physics, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan 5. Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan 6. Department of Physics, Tokyo Gakugei University, 4-1-1Nukuikitamachi, Koganei, Tokyo, 184-8501, Japan 7. RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan 8. Department of Applied Physics, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan 9. Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei-shi, Tokyo, 184-8584, Japan |
| Abstract: | We recently reported an experiment which focused on demonstrating the macro-coherent amplification mechanism. This mechanism, which was proposed for neutrino mass measurements, indicates that a multi-particle emission rate should be amplified by coherence in a suitable medium. Using a para-hydrogen molecule gas target and the adiabatic Raman excitation method, we observed that the two photon emission rate was amplified by a factor of more than 1015 from the spontaneous emission rate. This paper briefly summarizes the previous experimental result and presents the current status and the future prospect. |
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