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

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.; Lim, G. Y.; Ma, J.; MacFarland, D.; Maeda, Y.; Matsumura, T.; Murayama, R.; Naito, D.; Nakaya, Y.; Nanjo, H.; Nomura, T.; Odani, Y.; Okuno, H.; Ri, Y. D.; Sasao, N.; Sato, K.; Sato, T.; Seki, S.; Shimogawa, T.; Shinkawa, T.; Shiomi, K.; Son, J. S.; Sugiyama, Y.; Suzuki, S.; Tajima, Y.; Takahashi, G.; Takashima, Y.; Tecchio, M.; Togawa, M.; Toyoda, T.; Tung, Y. C.; Wah, Y. W.; Watanabe, H.; Woo, J. K.; Xu, J.; Yamanaka, T.; Yanagida, Y.; Yoshida, H. Y.; Yoshimoto, H.

doi:10.1093/ptep/ptv171

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

Abstract

The KOTO(K⁰ at Tokai) experiment aims to observe the CP-violating rare decay K_L → π⁰νν¯ over bar 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 → 3 π⁰, K_L → 2 π⁰, and K_L → 2γ, 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. Here, the K_L flux was measured as (4.183 ± 0.017_stat. ± 0.059_sys.) x 10⁷ K_L per 2 x 10¹⁴ protons on a 66-mm-long Au target.

Authors:

Masuda, T. ^[1]; Ahn, J. K. ^[2]; Banno, S. ^[3]; Campbell, M. ^[4]; Comfort, J. ^[5]; Duh, Y. T. ^[6]; Hineno, T. ^[7]; Hsiung, Y. B. ^[6]; Inagaki, T. ^[8]; Iwai, E. ^[9]; Kawasaki, N. ^[10]; Kim, E. J. ^[11]; Kim, Y. J. ^[12]; Ko, J. W. ^[12]; Komatsubara, T. K. ^[8]; Kurilin, A. S. ^[13]; Lee, G. H. ^[11]; Lee, J. W. ^[14]; Lee, S. K. ^[11]; Lim, G. Y. ^[8] more »

Kyoto Univ., Kyoto (Japan); Okayama Univ., Okayama (Japan)
Korea Univ., Seoul (Republic of Korea)
Osaka Univ., Osaka (Japan); Canon IT Solutions, Inc., Tokyo (Japan)
Univ. of Michigan, Ann Arbor, MI (United States)
Arizona State Univ., Tempe, AZ (United States)
National Taiwan Univ., Taiwan (Republic of China)
Kyoto Univ., Kyoto (Japan); Fujitsu FIP Corp., Tokyo (Japan)
High Energy Accelerator Research Organization (KEK), Ibaraki (Japan)
Osaka Univ., Osaka (Japan); High Energy Accelerator Research Organization (KEK), Ibaraki (Japan)
Kyoto Univ., Kyoto (Japan)
Chonbuk National Univ., Jeonju (Republic of Korea)
Jeju National Univ., Jeju (Republic of Korea)
Joint Institute for Nuclear Researches, Dubna (Russia)
Osaka Univ., Osaka (Japan); Korea Univ., Seoul (Republic of Korea)
Univ. of Chicago, Chicago, IL (United States); Mayo Clinic, Rochester, MN (United States)
Kyoto Univ., Kyoto (Japan); Nagoya Univ., Nagoya (Japan)
National Defense Academy, Kanagawa (Japan)
Osaka Univ., Osaka (Japan)
Saga Univ., Saga (Japan); JASTEC Co., Ltd., Tokyo (Japan)
Osaka Univ., Osaka (Japan); Hitachi Industry and Control Solutions, Ltd., Ibaraki (Japan)
Okayama Univ., Okayama (Japan)
Osaka Univ., Osaka (Japan); Univ. of Tokyo, Chiba (Japan)
Saga Univ., Saga (Japan); High Energy Accelerator Research Organization (KEK), Ibaraki (Japan)
Saga Univ., Saga (Japan)
Yamagata Univ., Yamagata (Japan)
Osaka Univ., Osaka (Japan); Gigaphoton Inc., Tochigi (Japan)
Osaka Univ., Osaka (Japan); Hitachi, Ltd., Tokyo (Japan)
National Taiwan Univ., Taiwan (Republic of China); Univ. of Chicago, Chicago, IL (United States)
Univ. of Chicago, Chicago, IL (United States)
Univ. of Michigan, Ann Arbor, MI (United States); Apple Inc., Cupertino, CA (United States)
Osaka Univ., Osaka (Japan); Shimadzu Corp., Kyoto (Japan)
Osaka Univ., Osaka (Japan); Resona Bank, Ltd., Osaka (Japan)

Publication Date:: Sun Jan 24 00:00:00 EST 2016

Research Org.:: Office of Scientific and Technical Information, Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1375939

Resource Type:: Accepted Manuscript

Journal Name:: Progress of Theoretical and Experimental Physics

Additional Journal Information:: Journal Volume: 2016; Journal Issue: 1; Journal ID: ISSN 2050-3911

Publisher:: Physical Society of Japan

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    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., Lim, G. Y., Ma, J., MacFarland, D., Maeda, Y., Matsumura, T., Murayama, R., Naito, D., Nakaya, Y., Nanjo, H., Nomura, T., Odani, Y., Okuno, H., Ri, Y. D., Sasao, N., Sato, K., Sato, T., Seki, S., Shimogawa, T., Shinkawa, T., Shiomi, K., Son, J. S., Sugiyama, Y., Suzuki, S., Tajima, Y., Takahashi, G., Takashima, Y., Tecchio, M., Togawa, M., Toyoda, T., Tung, Y. C., Wah, Y. W., Watanabe, H., Woo, J. K., Xu, J., Yamanaka, T., Yanagida, Y., Yoshida, H. Y., and Yoshimoto, H. Long-lived neutral-kaon flux measurement for the KOTO experiment.  United States: N. p., 2016. 
Web.  doi:10.1093/ptep/ptv171.

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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., Lim, G. Y., Ma, J., MacFarland, D., Maeda, Y., Matsumura, T., Murayama, R., Naito, D., Nakaya, Y., Nanjo, H., Nomura, T., Odani, Y., Okuno, H., Ri, Y. D., Sasao, N., Sato, K., Sato, T., Seki, S., Shimogawa, T., Shinkawa, T., Shiomi, K., Son, J. S., Sugiyama, Y., Suzuki, S., Tajima, Y., Takahashi, G., Takashima, Y., Tecchio, M., Togawa, M., Toyoda, T., Tung, Y. C., Wah, Y. W., Watanabe, H., Woo, J. K., Xu, J., Yamanaka, T., Yanagida, Y., Yoshida, H. Y., & Yoshimoto, H. Long-lived neutral-kaon flux measurement for the KOTO experiment.  United States.  https://doi.org/10.1093/ptep/ptv171

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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., Lim, G. Y., Ma, J., MacFarland, D., Maeda, Y., Matsumura, T., Murayama, R., Naito, D., Nakaya, Y., Nanjo, H., Nomura, T., Odani, Y., Okuno, H., Ri, Y. D., Sasao, N., Sato, K., Sato, T., Seki, S., Shimogawa, T., Shinkawa, T., Shiomi, K., Son, J. S., Sugiyama, Y., Suzuki, S., Tajima, Y., Takahashi, G., Takashima, Y., Tecchio, M., Togawa, M., Toyoda, T., Tung, Y. C., Wah, Y. W., Watanabe, H., Woo, J. K., Xu, J., Yamanaka, T., Yanagida, Y., Yoshida, H. Y., and Yoshimoto, H. Sun .  
"Long-lived neutral-kaon flux measurement for the KOTO experiment".  United States.  https://doi.org/10.1093/ptep/ptv171.  https://www.osti.gov/servlets/purl/1375939.

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@article{osti_1375939,

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

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

  abstractNote = {The KOTO(K0 at Tokai) experiment aims to observe the CP-violating rare decay KL → π0νν¯ over bar 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 → 3 π0, KL → 2 π0, and KL → 2γ, 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. Here, the KL flux was measured as (4.183 ± 0.017stat. ± 0.059sys.) x 107 KL per 2 x 1014 protons on a 66-mm-long Au target.},

  doi          = {10.1093/ptep/ptv171},

  journal      = {Progress of Theoretical and Experimental Physics},

  number       = 1,

  volume       = 2016,

  place        = {United States},

  year         = {Sun Jan 24 00:00:00 EST 2016},

  month        = {Sun Jan 24 00:00:00 EST 2016}

}

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Works referenced in this record:

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

Abstract

Citation Formats

Two-loop electroweak corrections for the K → π ν ν ¯ decays journal, February 2011

Parametrization of the Kobayashi-Maskawa Matrix journal, November 1983

Experimental study of the decay K L 0 → π 0 ν ν ¯ journal, April 2010

The J-PARC KOTO experiment journal, January 2012

Introduction to J-PARC journal, January 2012

Measurement of flux at the J-PARC neutral-kaon beam line journal, February 2012

Beam commissioning and operation of the J-PARC main ring synchrotron journal, January 2012

Primary proton beam line at the J-PARC hadron experimental facility journal, January 2012

Geant4—a simulation toolkit journal, July 2003

Geant4 developments and applications journal, February 2006

Design of the neutral K0L beamline for the KOTO experiment journal, November 2010

Performance study of a prototype pure CsI calorimeter for the KOTO experiment journal, June 2015

Barrel photon detector of the KEK experiment journal, July 2008

A vacuum tolerant high voltage system with a low noise and low power Cockcroft–Walton photomultiplier base journal, May 2014

Custom 14-Bit, 125MHz ADC/Data Processing Module for the KL Experiment at J-Parc conference, October 2007

The Data Acquisition System for the KOTO Detector journal, January 2012

Review of Particle Physics journal, August 2014

KOTO Detector Status conference, November 2013

Two-loop electroweak corrections for the $K \to π ν \bar{ν}$ decays
journal, February 2011

Parametrization of the Kobayashi-Maskawa Matrix
journal, November 1983

Experimental study of the decay $K_{L}^{0} \to π^{0} ν \bar{ν}$
journal, April 2010

The J-PARC KOTO experiment
journal, January 2012

Introduction to J-PARC
journal, January 2012

Measurement of flux at the J-PARC neutral-kaon beam line
journal, February 2012

Beam commissioning and operation of the J-PARC main ring synchrotron
journal, January 2012

Primary proton beam line at the J-PARC hadron experimental facility
journal, January 2012

Geant4—a simulation toolkit
journal, July 2003

Geant4 developments and applications
journal, February 2006

Design of the neutral K0L beamline for the KOTO experiment
journal, November 2010

Performance study of a prototype pure CsI calorimeter for the KOTO experiment
journal, June 2015

Barrel photon detector of the KEK experiment
journal, July 2008

A vacuum tolerant high voltage system with a low noise and low power Cockcroft–Walton photomultiplier base
journal, May 2014

Custom 14-Bit, 125MHz ADC/Data Processing Module for the KL Experiment at J-Parc
conference, October 2007

The Data Acquisition System for the KOTO Detector
journal, January 2012

Review of Particle Physics
journal, August 2014

KOTO Detector Status
conference, November 2013