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Search for K_{L}→π
Ahn, J K; Beckford, B; Beechert, J; Bryant, K; Campbell, M; Chen, S H; Comfort, J; Dona, K; Hara, N; Haraguchi, H; Hsiung, Y B; Hutcheson, M; Inagaki, T; Kamiji, I; Kawasaki, N; Kim, E J; Kim, J L; Kim, Y J; Ko, J W; Komatsubara, T K; Kotera, K; Kurilin, A S; Lee, J W; Lim, G Y; Lin, C; Lin, Q; Luo, Y; Ma, J; Maeda, Y; Mari, T; Masuda, T; Matsumura, T; Mcfarland, D; McNeal, N; Micallef, J; Miyazaki, K; Murayama, R; Naito, D; Nakagiri, K; Nanjo, H; Nishimiya, H; Nomura, T; Ohsugi, M; Okuno, H; Sasaki, M; Sasao, N; Sato, K; Sato, T; Sato, Y; Schamis, H.
Afiliação
  • Ahn JK; Department of Physics, Korea University, Seoul 02841, Republic of Korea.
  • Beckford B; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Beechert J; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Bryant K; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Campbell M; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Chen SH; Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China.
  • Comfort J; Department of Physics, Arizona State University, Tempe, Arizona 85287, USA.
  • Dona K; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Hara N; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Haraguchi H; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Hsiung YB; Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China.
  • Hutcheson M; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Inagaki T; Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
  • Kamiji I; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Kawasaki N; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Kim EJ; Division of Science Education, Chonbuk National University, Jeonju 54896, Republic of Korea.
  • Kim JL; Department of Physics, Korea University, Seoul 02841, Republic of Korea.
  • Kim YJ; Department of Physics, Jeju National University, Jeju 63243, Republic of Korea.
  • Ko JW; Department of Physics, Jeju National University, Jeju 63243, Republic of Korea.
  • Komatsubara TK; Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
  • Kotera K; J-PARC Center, Tokai, Ibaraki 319-1195, Japan.
  • Kurilin AS; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Lee JW; Laboratory of Nuclear Problems, Joint Institute for Nuclear Researches, Dubna, Moscow region 141980, Russia.
  • Lim GY; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Lin C; Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
  • Lin Q; J-PARC Center, Tokai, Ibaraki 319-1195, Japan.
  • Luo Y; Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China.
  • Ma J; Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
  • Maeda Y; Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
  • Mari T; Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
  • Masuda T; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Matsumura T; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Mcfarland D; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • McNeal N; Department of Applied Physics, National Defense Academy, Kanagawa 239-8686, Japan.
  • Micallef J; Department of Physics, Arizona State University, Tempe, Arizona 85287, USA.
  • Miyazaki K; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Murayama R; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Naito D; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Nakagiri K; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Nanjo H; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Nishimiya H; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Nomura T; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Ohsugi M; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Okuno H; Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
  • Sasaki M; J-PARC Center, Tokai, Ibaraki 319-1195, Japan.
  • Sasao N; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
  • Sato K; Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
  • Sato T; Department of Physics, Yamagata University, Yamagata 990-8560, Japan.
  • Sato Y; Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan.
  • Schamis H; Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Phys Rev Lett ; 122(2): 021802, 2019 Jan 18.
Article em En | MEDLINE | ID: mdl-30720307
ABSTRACT
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}.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2019 Tipo de documento: Article
Texto completo
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XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2019 Tipo de documento: Article