Long-lived neutral-kaon flux measurement for the KOTO experiment

T. Masuda; J. K. Ahn; S. Banno; M. Campbell; J. Comfort; Y. T. Duh; T. Hineno; Y. B. Hsiung; T. Inagaki; E. Iwai; N. Kawasaki; E. J. Kim; Y. J. Kim; J. W. Ko; T. K. Komatsubara; A. S. Kurilin; G. H. Lee; J. W. Lee; S. K. Lee; G. Y. Lim; J. Ma; D. MacFarland; Y. Maeda; T. Matsumura; R. Murayama; D. Naito; Y. Nakaya; H. Nanjo; T. Nomura; Y. Odani; H. Okuno; Y. D. Ri; N. Sasao; K. Sato; T. Sato; S. Seki; T. Shimogawa; T. Shinkawa; K. Shiomi; J. S. Son; Y. Sugiyama; S. Suzuki; Y. Tajima; G. Takahashi; Y. Takashima; M. Tecchio; M. Togawa; T. Toyoda; Y. C. Tung; Y. W. Wah; H. Watanabe; J. K. Woo; J. Xu; T. Yamanaka; Y. Yanagida; H. Y. Yoshida; H. Yoshimoto

doi:10.1093/ptep/ptv171

Long-lived neutral-kaon flux measurement for the KOTO experiment

T. Masuda, J. K. Ahn, S. Banno, M. Campbell, J. Comfort, Y. T. Duh, T. Hineno, Y. B. Hsiung, T. Inagaki, E. Iwai, N. Kawasaki, E. J. Kim, Y. J. Kim, J. W. Ko, T. K. Komatsubara, A. S. Kurilin, G. H. Lee, J. W. Lee, S. K. Lee, G. Y. LimJ. Ma, D. MacFarland, Y. Maeda, T. Matsumura, R. Murayama, D. Naito, Y. Nakaya, H. Nanjo, T. Nomura, Y. Odani, H. Okuno, Y. D. Ri, N. Sasao, K. Sato, T. Sato, S. Seki, T. Shimogawa, T. Shinkawa, K. Shiomi, J. S. Son, Y. Sugiyama, S. Suzuki, Y. Tajima, G. Takahashi, Y. Takashima, M. Tecchio, M. Togawa, T. Toyoda, Y. C. Tung, Y. W. Wah, H. Watanabe, J. K. Woo, J. Xu, T. Yamanaka, Y. Yanagida, H. Y. Yoshida, H. Yoshimoto

Department of Physics

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Abstract

The KOTO (K at Tokai) experiment aims to observe the CP-violating rare decay K_L → π→→ by using a long-lived neutral-kaon beam produced by the 30 GeV proton beam at the Japan Proton Accelerator Research Complex. The K_L flux is an essential parameter for the measurement of the branching fraction. Three K_L neutral decay modes, K_L → 3p 0, K_L → 2π, and K_L → 2→, were used to measure the K_L flux in the beam line in the 2013 KOTO engineering run. A Monte Carlo simulation was used to estimate the detector acceptance for these decays. Agreement was found between the simulation model and the experimental data, and the remaining systematic uncertainty was estimated at the 1.4% level. The K_L flux was measured as (4.183 ± 0.017_stat. ± 0.059_sys.) × 10⁷ K_L per 2 × 10¹⁴ protons on a 66-mm-long Au target.

Original language	English
Article number	013C03
Journal	Progress of Theoretical and Experimental Physics
Volume	2016
Issue number	1
DOIs	https://doi.org/10.1093/ptep/ptv171
Publication status	Published - 2016 Jan

ASJC Scopus subject areas

Physics and Astronomy(all)

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Masuda, T., Ahn, J. K., Banno, S., Campbell, M., Comfort, J., Duh, Y. T., Hineno, T., Hsiung, Y. B., Inagaki, T., Iwai, E., Kawasaki, N., Kim, E. J., Kim, Y. J., Ko, J. W., Komatsubara, T. K., Kurilin, A. S., Lee, G. H., Lee, J. W., Lee, S. K., ... Yoshimoto, H. (2016). Long-lived neutral-kaon flux measurement for the KOTO experiment. Progress of Theoretical and Experimental Physics, 2016(1), Article 013C03. https://doi.org/10.1093/ptep/ptv171

Masuda, T, Ahn, JK, Banno, S, Campbell, M, Comfort, J, Duh, YT, Hineno, T, Hsiung, YB, Inagaki, T, Iwai, E, Kawasaki, N, Kim, EJ, Kim, YJ, Ko, JW, Komatsubara, TK, Kurilin, AS, Lee, GH, Lee, JW, Lee, SK, Lim, GY, Ma, J, MacFarland, D, Maeda, Y, Matsumura, T, Murayama, R, Naito, D, Nakaya, Y, Nanjo, H, Nomura, T, Odani, Y, Okuno, H, Ri, YD, Sasao, N, Sato, K, Sato, T, Seki, S, Shimogawa, T, Shinkawa, T, Shiomi, K, Son, JS, Sugiyama, Y, Suzuki, S, Tajima, Y, Takahashi, G, Takashima, Y, Tecchio, M, Togawa, M, Toyoda, T, Tung, YC, Wah, YW, Watanabe, H, Woo, JK, Xu, J, Yamanaka, T, Yanagida, Y, Yoshida, HY & Yoshimoto, H 2016, 'Long-lived neutral-kaon flux measurement for the KOTO experiment', Progress of Theoretical and Experimental Physics, vol. 2016, no. 1, 013C03. https://doi.org/10.1093/ptep/ptv171

@article{8f0c4cd907494a44bb1d9aa1d592b1ee,

title = "Long-lived neutral-kaon flux measurement for the KOTO experiment",

abstract = "The KOTO (K at Tokai) experiment aims to observe the CP-violating rare decay KL → π→→ by using a long-lived neutral-kaon beam produced by the 30 GeV proton beam at the Japan Proton Accelerator Research Complex. The KL flux is an essential parameter for the measurement of the branching fraction. Three KL neutral decay modes, KL → 3p 0, KL → 2π, and KL → 2→, were used to measure the KL flux in the beam line in the 2013 KOTO engineering run. A Monte Carlo simulation was used to estimate the detector acceptance for these decays. Agreement was found between the simulation model and the experimental data, and the remaining systematic uncertainty was estimated at the 1.4% level. The KL flux was measured as (4.183 ± 0.017stat. ± 0.059sys.) × 107 KL per 2 × 1014 protons on a 66-mm-long Au target.",

author = "T. Masuda and Ahn, {J. K.} and S. Banno and M. Campbell and J. Comfort and Duh, {Y. T.} and T. Hineno and Hsiung, {Y. B.} and T. Inagaki and E. Iwai 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, {J. W.} and Lee, {S. K.} and Lim, {G. Y.} and J. Ma and D. MacFarland and Y. Maeda and T. Matsumura and R. Murayama and D. Naito and Y. Nakaya and H. Nanjo and T. Nomura and Y. Odani and H. Okuno and Ri, {Y. D.} and N. Sasao and K. Sato and T. Sato and S. Seki and T. Shimogawa and T. Shinkawa and K. Shiomi and Son, {J. S.} and Y. Sugiyama and S. Suzuki and Y. Tajima and G. Takahashi and Y. Takashima and M. Tecchio and M. Togawa and T. Toyoda and Tung, {Y. C.} and Wah, {Y. W.} and H. Watanabe and Woo, {J. K.} and J. Xu and T. Yamanaka and Y. Yanagida and Yoshida, {H. Y.} and H. Yoshimoto",

note = "Publisher Copyright: {\textcopyright} 2016 The Author(s).",

year = "2016",

month = jan,

doi = "10.1093/ptep/ptv171",

language = "English",

volume = "2016",

journal = "Progress of Theoretical and Experimental Physics",

issn = "2050-3911",

publisher = "Oxford University Press",

number = "1",

}

TY - JOUR

T1 - Long-lived neutral-kaon flux measurement for the KOTO experiment

AU - Masuda, T.

AU - Ahn, J. K.

AU - Banno, S.

AU - Campbell, M.

AU - Comfort, J.

AU - Duh, Y. T.

AU - Hineno, T.

AU - Hsiung, Y. B.

AU - Inagaki, T.

AU - Iwai, E.

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, J. W.

AU - Lee, S. K.

AU - Lim, G. Y.

AU - Ma, J.

AU - MacFarland, D.

AU - Maeda, Y.

AU - Matsumura, T.

AU - Murayama, R.

AU - Naito, D.

AU - Nakaya, Y.

AU - Nanjo, H.

AU - Nomura, T.

AU - Odani, Y.

AU - Okuno, H.

AU - Ri, Y. D.

AU - Sasao, N.

AU - Sato, K.

AU - Sato, T.

AU - Seki, S.

AU - Shimogawa, T.

AU - Shinkawa, T.

AU - Shiomi, K.

AU - Son, J. S.

AU - Sugiyama, Y.

AU - Suzuki, S.

AU - Tajima, Y.

AU - Takahashi, G.

AU - Takashima, Y.

AU - Tecchio, M.

AU - Togawa, M.

AU - Toyoda, T.

AU - Tung, Y. C.

AU - Wah, Y. W.

AU - Watanabe, H.

AU - Woo, J. K.

AU - Xu, J.

AU - Yamanaka, T.

AU - Yanagida, Y.

AU - Yoshida, H. Y.

AU - Yoshimoto, H.

PY - 2016/1

Y1 - 2016/1

N2 - The KOTO (K at Tokai) experiment aims to observe the CP-violating rare decay KL → π→→ by using a long-lived neutral-kaon beam produced by the 30 GeV proton beam at the Japan Proton Accelerator Research Complex. The KL flux is an essential parameter for the measurement of the branching fraction. Three KL neutral decay modes, KL → 3p 0, KL → 2π, and KL → 2→, were used to measure the KL flux in the beam line in the 2013 KOTO engineering run. A Monte Carlo simulation was used to estimate the detector acceptance for these decays. Agreement was found between the simulation model and the experimental data, and the remaining systematic uncertainty was estimated at the 1.4% level. The KL flux was measured as (4.183 ± 0.017stat. ± 0.059sys.) × 107 KL per 2 × 1014 protons on a 66-mm-long Au target.

AB - The KOTO (K at Tokai) experiment aims to observe the CP-violating rare decay KL → π→→ by using a long-lived neutral-kaon beam produced by the 30 GeV proton beam at the Japan Proton Accelerator Research Complex. The KL flux is an essential parameter for the measurement of the branching fraction. Three KL neutral decay modes, KL → 3p 0, KL → 2π, and KL → 2→, were used to measure the KL flux in the beam line in the 2013 KOTO engineering run. A Monte Carlo simulation was used to estimate the detector acceptance for these decays. Agreement was found between the simulation model and the experimental data, and the remaining systematic uncertainty was estimated at the 1.4% level. The KL flux was measured as (4.183 ± 0.017stat. ± 0.059sys.) × 107 KL per 2 × 1014 protons on a 66-mm-long Au target.

UR - http://www.scopus.com/inward/record.url?scp=84997654178&partnerID=8YFLogxK

U2 - 10.1093/ptep/ptv171

DO - 10.1093/ptep/ptv171

M3 - Article

AN - SCOPUS:84997654178

SN - 2050-3911

VL - 2016

JO - Progress of Theoretical and Experimental Physics

JF - Progress of Theoretical and Experimental Physics

IS - 1

M1 - 013C03

ER -

Long-lived neutral-kaon flux measurement for the KOTO experiment

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