Search for KL→π0νν¯ and KL→π0X0 Decays at the J-PARC KOTO Experiment
| العنوان: | Search for KL→π0νν¯ and KL→π0X0 Decays at the J-PARC KOTO Experiment |
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| المؤلفون: | J. W. Ko, Y. J. Kim, M. Taylor, T. Mari, M. Tecchio, Yusuke T. Maeda, Toshio Masuda, Y. W. Wah, K. Kotera, N. McNeal, Y. C. Tung, Tetsushi Shimogawa, S. Su, Jessie Micallef, N. Kawasaki, J. K. Woo, K. Bryant, J. Beechert, C. Lin, Y. Sato, J. K. Ahn, T. K. Komatsubara, I. Kamiji, Y. B. Hsiung, S. H. Chen, M. Ohsugi, Motoya Sasaki, Manabu Togawa, Eunja Kim, S. Shinohara, G. Y. Lim, Hiroshi Yoshida, J. R. Comfort, T. Inagaki, H. Okuno, A. S. Kurilin, K. Dona, K. Miyazaki, Jongmin Lee, K. Shiomi, J. L. Kim, Toru Sato, Y. Luo, S. Suzuki, H. Schamis, M. Hutcheson, Koichi Sato, S. Seki, D. Naito, Y. Sugiyama, Noboru Sasao, H. Haraguchi, K. Nakagiri, T. Nomura, N. Hara, M. Campbell, D. Mcfarland, H. Nishimiya, T. Shinkawa, Q. S. Lin, T. Yamanaka, T. Matsumura, Hiroaki Watanabe, J. Ma, N. Shimizu, R. Murayama, Hajime Nanjo, Yasuhisa Tajima, B. Beckford |
| المصدر: | Physical Review Letters. 122 |
| بيانات النشر: | American Physical Society (APS), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Physics, Particle physics, Branching fraction, 0103 physical sciences, General Physics and Astronomy, J-PARC, Sensitivity (control systems), 010306 general physics, 01 natural sciences, Order of magnitude, Boson |
| الوصف: | A search for the rare decay K_{L}→π^{0}νν[over ¯] was performed. With the data collected in 2015, corresponding to 2.2×10^{19} protons on target, a single event sensitivity of (1.30±0.01_{stat}±0.14_{syst})×10^{-9} was achieved and no candidate events were observed. We set an upper limit of 3.0×10^{-9} for the branching fraction of K_{L}→π^{0}νν[over ¯] at the 90% confidence level (C.L.), which improved the previous limit by almost an order of magnitude. An upper limit for K_{L}→π^{0}X^{0} was also set as 2.4×10^{-9} at the 90% C.L., where X^{0} is an invisible boson with a mass of 135 MeV/c^{2}. |
| تدمد: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.122.021802 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::4fb4f78152f4e107d854f5f8f6a9f48c https://doi.org/10.1103/physrevlett.122.021802 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........4fb4f78152f4e107d854f5f8f6a9f48c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10797114 00319007 |
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| DOI: | 10.1103/physrevlett.122.021802 |