A new search for the KL → π0ν ν and KL → π 0X0 decays

J. K. Ahn; K. Y. Baek; S. Banno; B. Beckford; B. Brubaker; T. Cai; M. Campbell; C. Carruth; S. H. Chen; S. Chu; J. Comfort; Y. T. Duh; T. Furukawa; H. Haraguchi; T. Hineno; Y. B. Hsiung; M. Hutcheson; T. Inagaki; M. Isoe; E. Iwai; T. Kamibayashi; I. Kamiji; N. Kawasaki; E. J. Kim; Y. J. Kim; J. W. Ko; T. K. Komatsubara; A. S. Kurilin; G. H. Lee; H. S. Lee; J. W. Lee; S. K. Lee; G. Y. Lim; C. Lin; J. Ma; Y. Maeda; T. Masuda; T. Matsumura; D. McFarland; J. Micallef; K. Miyazaki; K. Morgan; R. Murayama; D. Naito; K. Nakagiri; Y. Nakajima; Y. Nakaya; H. Nanjo; T. Nomura; T. Nomura; Y. Odani; R. Ogata; H. Okuno; T. Ota; Y. D. Ri; M. Sasaki; N. Sasao; K. Sato; T. Sato; S. Seki; T. Shimogawa; T. Shinkawa; S. Shinohara; K. Shiomi; J. S. Son; J. Stevens; S. Su; Y. Sugiyama; S. Suzuki; Y. Tajima; G. Takahashi; Y. Takashima; M. Tecchio; I. Teo; M. Togawa; T. Toyoda; Y. C. Tung; T. Usuki; Y. W. Wah; H. Watanabe; N. Whallon; J. K. Woo; J. Xu; M. Yamaga; S. Yamamoto; T. Yamanaka; H. Yamauchi; Y. Yanagida; H. Yokota; H. Y. Yoshida; H. Yoshimoto

doi:10.1093/ptep/ptx001

A new search for the K_L → π⁰ν ν and K_L → π ⁰X⁰ decays

J. K. Ahn
, K. Y. Baek
, S. Banno
, B. Beckford
, B. Brubaker
, T. Cai
, M. Campbell
, C. Carruth
, S. H. Chen
, S. Chu
, J. Comfort
, Y. T. Duh
, T. Furukawa
, H. Haraguchi
, T. Hineno
, Y. B. Hsiung
, M. Hutcheson
, T. Inagaki
, M. Isoe
, E. Iwai

T. Kamibayashi, I. Kamiji, N. Kawasaki, E. J. Kim, Y. J. Kim, J. W. Ko, T. K. Komatsubara, A. S. Kurilin, G. H. Lee, H. S. Lee, J. W. Lee, S. K. Lee, G. Y. Lim, C. Lin, J. Ma, Y. Maeda, T. Masuda, T. Matsumura, D. McFarland, J. Micallef, K. Miyazaki, K. Morgan, R. Murayama, D. Naito, K. Nakagiri, Y. Nakajima, Y. Nakaya, H. Nanjo, T. Nomura, T. Nomura, Y. Odani, R. Ogata, H. Okuno, T. Ota, Y. D. Ri, M. Sasaki, N. Sasao, K. Sato, T. Sato, S. Seki, T. Shimogawa, T. Shinkawa, S. Shinohara, K. Shiomi, J. S. Son, J. Stevens, S. Su, Y. Sugiyama, S. Suzuki, Y. Tajima, G. Takahashi, Y. Takashima, M. Tecchio, I. Teo, M. Togawa, T. Toyoda, Y. C. Tung, T. Usuki, Y. W. Wah, H. Watanabe, N. Whallon, J. K. Woo, J. Xu, M. Yamaga, S. Yamamoto, T. Yamanaka, H. Yamauchi, Y. Yanagida, H. Yokota, H. Y. Yoshida, H. Yoshimoto

Physics Education

Korea University
Pusan National University
The University of Osaka
University of Michigan, Ann Arbor
The University of Chicago
Yale University
University of Rochester
University of California at Berkeley
National Taiwan University
Arizona State University
Saga University
Kyoto University
High Energy Accelerator Research Organization, Institute of Particle and Nuclear Physics
Yamagata University
Jeju National University
J-PARC Center
Joint Institute for Nuclear Research
Jeonbuk National University
Institute for Basic Science
Nagoya University
Okayama University
National Defense Academy of Japan
Michigan State University
University of Wisconsin-Madison
High Energy Accelerator Research Organization, Accelerator Laboratory
The University of Tokyo
Cornell University
University of Illinois at Urbana-Champaign
University of Washington
Japan Synchrotron Radiation Research Institute

Research output: Contribution to journal › Journal article › peer-review

37 Scopus citations

Abstract

We searched for the CP-violating rare decay of the neutral kaon, K_L → π⁰ν ν, in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experiment. One candidate event was observed while 0.34 ± 0.16 background events were expected.We set an upper limit of 5.1 × 10^-8 for the branching fraction at the 90% confidence level (C.L.). An upper limit of 3.7 × 10^-8 at the 90% C.L. for the K_L → π⁰X⁰ decay was also set for the first time, where X⁰ is an invisible particle with a mass of 135 MeV/c².

Original language	English
Article number	021C01
Journal	Progress of Theoretical and Experimental Physics
Volume	2017
Issue number	2
DOIs	https://doi.org/10.1093/ptep/ptx001
State	Published - 2017.02.1

Quacquarelli Symonds(QS) Subject Topics

Physics & Astronomy

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10.1093/ptep/ptx001

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Ahn, J. K., Baek, K. Y., Banno, S., Beckford, B., Brubaker, B., Cai, T., Campbell, M., Carruth, C., Chen, S. H., Chu, S., Comfort, J., Duh, Y. T., Furukawa, T., Haraguchi, H., Hineno, T., Hsiung, Y. B., Hutcheson, M., Inagaki, T., Isoe, M., ... Yoshimoto, H. (2017). A new search for the K_L → π⁰ν ν and K_L → π ⁰X⁰ decays. Progress of Theoretical and Experimental Physics, 2017(2), Article 021C01. https://doi.org/10.1093/ptep/ptx001

@article{b552ed22b82048208d59c38680c9eb57,

title = "A new search for the KL → π0ν ν and KL → π 0X0 decays",

abstract = "We searched for the CP-violating rare decay of the neutral kaon, KL → π0ν ν, in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experiment. One candidate event was observed while 0.34 ± 0.16 background events were expected.We set an upper limit of 5.1 × 10-8 for the branching fraction at the 90\% confidence level (C.L.). An upper limit of 3.7 × 10-8 at the 90\% C.L. for the KL → π0X0 decay was also set for the first time, where X0 is an invisible particle with a mass of 135 MeV/c2.",

author = "Ahn, \{J. K.\} and Baek, \{K. Y.\} and S. Banno and B. Beckford and B. Brubaker and T. Cai and M. Campbell and C. Carruth and Chen, \{S. H.\} and S. Chu and J. Comfort and Duh, \{Y. T.\} and T. Furukawa and H. Haraguchi and T. Hineno and Hsiung, \{Y. B.\} and M. Hutcheson and T. Inagaki and M. Isoe and E. Iwai and T. Kamibayashi and I. Kamiji and N. Kawasaki and Kim, \{E. J.\} and Kim, \{Y. J.\} and Ko, \{J. W.\} and Komatsubara, \{T. K.\} and Kurilin, \{A. S.\} and Lee, \{G. H.\} and Lee, \{H. S.\} and Lee, \{J. W.\} and Lee, \{S. K.\} and Lim, \{G. Y.\} and C. Lin and J. Ma and Y. Maeda and T. Masuda and T. Matsumura and D. McFarland and J. Micallef and K. Miyazaki and K. Morgan and R. Murayama and D. Naito and K. Nakagiri and Y. Nakajima and Y. Nakaya and H. Nanjo and T. Nomura and T. Nomura and Y. Odani and R. Ogata and H. Okuno and T. Ota and Ri, \{Y. D.\} and M. Sasaki and N. Sasao and K. Sato and T. Sato and S. Seki and T. Shimogawa and T. Shinkawa and S. Shinohara and K. Shiomi and Son, \{J. S.\} and J. Stevens and S. Su and Y. Sugiyama and S. Suzuki and Y. Tajima and G. Takahashi and Y. Takashima and M. Tecchio and I. Teo and M. Togawa and T. Toyoda and Tung, \{Y. C.\} and T. Usuki and Wah, \{Y. W.\} and H. Watanabe and N. Whallon and Woo, \{J. K.\} and J. Xu and M. Yamaga and S. Yamamoto and T. Yamanaka and H. Yamauchi and Y. Yanagida and H. Yokota and Yoshida, \{H. Y.\} and H. Yoshimoto",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2017.",

year = "2017",

month = feb,

day = "1",

doi = "10.1093/ptep/ptx001",

language = "English",

volume = "2017",

journal = "Progress of Theoretical and Experimental Physics",

issn = "2050-3911",

number = "2",

}

Ahn, JK, Baek, KY, Banno, S, Beckford, B, Brubaker, B, Cai, T, Campbell, M, Carruth, C, Chen, SH, Chu, S, Comfort, J, Duh, YT, Furukawa, T, Haraguchi, H, Hineno, T, Hsiung, YB, Hutcheson, M, Inagaki, T, Isoe, M, Iwai, E, Kamibayashi, T, Kamiji, I, Kawasaki, N, Kim, EJ, Kim, YJ, Ko, JW, Komatsubara, TK, Kurilin, AS, Lee, GH, Lee, HS, Lee, JW, Lee, SK, Lim, GY, Lin, C, Ma, J, Maeda, Y, Masuda, T, Matsumura, T, McFarland, D, Micallef, J, Miyazaki, K, Morgan, K, Murayama, R, Naito, D, Nakagiri, K, Nakajima, Y, Nakaya, Y, Nanjo, H, Nomura, T, Nomura, T, Odani, Y, Ogata, R, Okuno, H, Ota, T, Ri, YD, Sasaki, M, Sasao, N, Sato, K, Sato, T, Seki, S, Shimogawa, T, Shinkawa, T, Shinohara, S, Shiomi, K, Son, JS, Stevens, J, Su, S, Sugiyama, Y, Suzuki, S, Tajima, Y, Takahashi, G, Takashima, Y, Tecchio, M, Teo, I, Togawa, M, Toyoda, T, Tung, YC, Usuki, T, Wah, YW, Watanabe, H, Whallon, N, Woo, JK, Xu, J, Yamaga, M, Yamamoto, S, Yamanaka, T, Yamauchi, H, Yanagida, Y, Yokota, H, Yoshida, HY & Yoshimoto, H 2017, 'A new search for the K_L → π⁰ν ν and K_L → π ⁰X⁰ decays', Progress of Theoretical and Experimental Physics, vol. 2017, no. 2, 021C01. https://doi.org/10.1093/ptep/ptx001

TY - JOUR

T1 - A new search for the KL → π0ν ν and KL → π 0X0 decays

AU - Ahn, J. K.

AU - Baek, K. Y.

AU - Banno, S.

AU - Beckford, B.

AU - Brubaker, B.

AU - Cai, T.

AU - Campbell, M.

AU - Carruth, C.

AU - Chen, S. H.

AU - Chu, S.

AU - Comfort, J.

AU - Duh, Y. T.

AU - Furukawa, T.

AU - Haraguchi, H.

AU - Hineno, T.

AU - Hsiung, Y. B.

AU - Hutcheson, M.

AU - Inagaki, T.

AU - Isoe, M.

AU - Iwai, E.

AU - Kamibayashi, T.

AU - Kamiji, I.

AU - Kawasaki, N.

AU - Kim, E. J.

AU - Kim, Y. J.

AU - Ko, J. W.

AU - Komatsubara, T. K.

AU - Kurilin, A. S.

AU - Lee, G. H.

AU - Lee, H. S.

AU - Lee, J. W.

AU - Lee, S. K.

AU - Lim, G. Y.

AU - Lin, C.

AU - Ma, J.

AU - Maeda, Y.

AU - Masuda, T.

AU - Matsumura, T.

AU - McFarland, D.

AU - Micallef, J.

AU - Miyazaki, K.

AU - Morgan, K.

AU - Murayama, R.

AU - Naito, D.

AU - Nakagiri, K.

AU - Nakajima, Y.

AU - Nakaya, Y.

AU - Nanjo, H.

AU - Nomura, T.

AU - Odani, Y.

AU - Ogata, R.

AU - Okuno, H.

AU - Ota, T.

AU - Ri, Y. D.

AU - Sasaki, M.

AU - Sasao, N.

AU - Sato, K.

AU - Sato, T.

AU - Seki, S.

AU - Shimogawa, T.

AU - Shinkawa, T.

AU - Shinohara, S.

AU - Shiomi, K.

AU - Son, J. S.

AU - Stevens, J.

AU - Su, S.

AU - Sugiyama, Y.

AU - Suzuki, S.

AU - Tajima, Y.

AU - Takahashi, G.

AU - Takashima, Y.

AU - Tecchio, M.

AU - Teo, I.

AU - Togawa, M.

AU - Toyoda, T.

AU - Tung, Y. C.

AU - Usuki, T.

AU - Wah, Y. W.

AU - Watanabe, H.

AU - Whallon, N.

AU - Woo, J. K.

AU - Xu, J.

AU - Yamaga, M.

AU - Yamamoto, S.

AU - Yamanaka, T.

AU - Yamauchi, H.

AU - Yanagida, Y.

AU - Yokota, H.

AU - Yoshida, H. Y.

AU - Yoshimoto, H.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - We searched for the CP-violating rare decay of the neutral kaon, KL → π0ν ν, in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experiment. One candidate event was observed while 0.34 ± 0.16 background events were expected.We set an upper limit of 5.1 × 10-8 for the branching fraction at the 90% confidence level (C.L.). An upper limit of 3.7 × 10-8 at the 90% C.L. for the KL → π0X0 decay was also set for the first time, where X0 is an invisible particle with a mass of 135 MeV/c2.

AB - We searched for the CP-violating rare decay of the neutral kaon, KL → π0ν ν, in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experiment. One candidate event was observed while 0.34 ± 0.16 background events were expected.We set an upper limit of 5.1 × 10-8 for the branching fraction at the 90% confidence level (C.L.). An upper limit of 3.7 × 10-8 at the 90% C.L. for the KL → π0X0 decay was also set for the first time, where X0 is an invisible particle with a mass of 135 MeV/c2.

UR - https://www.scopus.com/pages/publications/85015994825

U2 - 10.1093/ptep/ptx001

DO - 10.1093/ptep/ptx001

M3 - Journal article

AN - SCOPUS:85015994825

SN - 2050-3911

VL - 2017

JO - Progress of Theoretical and Experimental Physics

JF - Progress of Theoretical and Experimental Physics

IS - 2

M1 - 021C01

ER -

A new search for the K_L → π⁰ν ν and K_L → π ⁰X⁰ decays

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