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Title: Search for K L π 0 ν ν ¯ and K L π 0 X 0 Decays at the J-PARC KOTO Experiment

Abstract

A search for the rare decay KL → π0νν¯ was performed. With the data collected in 2015, corresponding to 2.2 × 1019 protons on target, a single event sensitivity of (1.30 ± 0.01stat ± 0.14syst) × 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 KL → π0νν¯ at the 90% confidence level (C.L.), which improved the previous limit by almost an order of magnitude. An upper limit for KL → π0X0 was also set as 2.4 × 10–9 at the 90% C.L., where X0 is an invisible boson with a mass of 135 MeV /c2.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
KOTO Collaboration
OSTI Identifier:
1490915
Alternate Identifier(s):
OSTI ID: 1643689
Grant/Contract Number:  
SC0006497; SC0007859; SC0009798
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 122 Journal Issue: 2; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Flavor changing neutral currents; Leptonic semileptonic & radiative decays; Rare decays; Hypothetical gauge bosons; Kaons; CP violation

Citation Formats

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., Seki, S., Shimizu, N., Shimogawa, T., Shinkawa, T., Shinohara, S., Shiomi, K., Su, S., Sugiyama, Y., Suzuki, S., Tajima, Y., Taylor, M., Tecchio, M., Togawa, M., Tung, Y. C., Wah, Y. W., Watanabe, H., Woo, J. K., Yamanaka, T., Yoshida, H. Y., and KOTO Collaboration. Search for K L → π 0 ν ν ¯ and K L → π 0 X 0 Decays at the J-PARC KOTO Experiment. United States: N. p., 2019. Web. https://doi.org/10.1103/PhysRevLett.122.021802.
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., Seki, S., Shimizu, N., Shimogawa, T., Shinkawa, T., Shinohara, S., Shiomi, K., Su, S., Sugiyama, Y., Suzuki, S., Tajima, Y., Taylor, M., Tecchio, M., Togawa, M., Tung, Y. C., Wah, Y. W., Watanabe, H., Woo, J. K., Yamanaka, T., Yoshida, H. Y., & KOTO Collaboration. Search for K L → π 0 ν ν ¯ and K L → π 0 X 0 Decays at the J-PARC KOTO Experiment. United States. https://doi.org/10.1103/PhysRevLett.122.021802
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., Seki, S., Shimizu, N., Shimogawa, T., Shinkawa, T., Shinohara, S., Shiomi, K., Su, S., Sugiyama, Y., Suzuki, S., Tajima, Y., Taylor, M., Tecchio, M., Togawa, M., Tung, Y. C., Wah, Y. W., Watanabe, H., Woo, J. K., Yamanaka, T., Yoshida, H. Y., and KOTO Collaboration. Tue . "Search for K L → π 0 ν ν ¯ and K L → π 0 X 0 Decays at the J-PARC KOTO Experiment". United States. https://doi.org/10.1103/PhysRevLett.122.021802.
@article{osti_1490915,
title = {Search for K L → π 0 ν ν ¯ and K L → π 0 X 0 Decays at the J-PARC KOTO Experiment},
author = {Ahn, J. K. and Beckford, B. and Beechert, J. and Bryant, K. and Campbell, M. and Chen, S. H. and Comfort, J. and Dona, K. and Hara, N. and Haraguchi, H. and Hsiung, Y. B. and Hutcheson, M. and Inagaki, T. and Kamiji, I. and Kawasaki, N. and Kim, E. J. and Kim, J. L. and Kim, Y. J. and Ko, J. W. and Komatsubara, T. K. and Kotera, K. and Kurilin, A. S. and Lee, J. W. and Lim, G. Y. and Lin, C. and Lin, Q. and Luo, Y. and Ma, J. and Maeda, Y. and Mari, T. and Masuda, T. and Matsumura, T. and Mcfarland, D. and McNeal, N. and Micallef, J. and Miyazaki, K. and Murayama, R. and Naito, D. and Nakagiri, K. and Nanjo, H. and Nishimiya, H. and Nomura, T. and Ohsugi, M. and Okuno, H. and Sasaki, M. and Sasao, N. and Sato, K. and Sato, T. and Sato, Y. and Schamis, H. and Seki, S. and Shimizu, N. and Shimogawa, T. and Shinkawa, T. and Shinohara, S. and Shiomi, K. and Su, S. and Sugiyama, Y. and Suzuki, S. and Tajima, Y. and Taylor, M. and Tecchio, M. and Togawa, M. and Tung, Y. C. and Wah, Y. W. and Watanabe, H. and Woo, J. K. and Yamanaka, T. and Yoshida, H. Y. and KOTO Collaboration},
abstractNote = {A search for the rare decay KL → π0νν¯ was performed. With the data collected in 2015, corresponding to 2.2 × 1019 protons on target, a single event sensitivity of (1.30 ± 0.01stat ± 0.14syst) × 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 KL → π0νν¯ at the 90% confidence level (C.L.), which improved the previous limit by almost an order of magnitude. An upper limit for KL → π0X0 was also set as 2.4 × 10–9 at the 90% C.L., where X0 is an invisible boson with a mass of 135 MeV /c2.},
doi = {10.1103/PhysRevLett.122.021802},
journal = {Physical Review Letters},
number = 2,
volume = 122,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.122.021802

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Cited by: 17 works
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Figures / Tables:

FIG. 1 FIG. 1: Cross-sectional view of the KOTO detector. The beam enters from the left. Detector components with their abbreviated names written in blue (in green and underlined) are photon (charged particle) veto counters. BPCV, newBHCV, and BHGC are new counters installed after 2013. BHCV and BHTS were not used inmore » the analysis.« less

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Works referenced in this record:

K → π ν ν ¯ $$ K\to \pi \nu \overline{\nu} $$ and ε′/ε in simplified new physics models
journal, November 2015

  • Buras, Andrzej J.; Buttazzo, Dario; Knegjens, Robert
  • Journal of High Energy Physics, Vol. 2015, Issue 11
  • DOI: 10.1007/JHEP11(2015)166

Recent developments in Geant4
journal, November 2016

  • Allison, J.; Amako, K.; Apostolakis, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 835
  • DOI: 10.1016/j.nima.2016.06.125

CP -violating decay K L 0 π 0 νν¯
journal, June 1989


Probing lepton-flavour universality with $$K\rightarrow \pi \nu \bar{\nu }$$ K → π ν ν ¯ decays
journal, September 2017


TMVA, the Toolkit for Multivariate Data Analysis with ROOT
conference, July 2009

  • Voss, Helge; Höcker, Andreas; Stelzer, Jörg
  • Proceedings of XI International Workshop on Advanced Computing and Analysis Techniques in Physics Research — PoS(ACAT)
  • DOI: 10.22323/1.050.0040

Loophole in K π ν ν ¯ Search and New Weak Leptonic Forces
journal, April 2015


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


Indirectly water-cooled production target at J-PARC hadron facility
journal, January 2015

  • Takahashi, H.; Agari, K.; Aoki, K.
  • Journal of Radioanalytical and Nuclear Chemistry, Vol. 305, Issue 3
  • DOI: 10.1007/s10967-015-3940-9

Z -induced FCNC decays of top, beauty, and strange quarks
journal, March 2016


A neutral-beam profile monitor with a phosphor screen and a high-sensitivity camera for the J-PARC KOTO experiment
journal, March 2018

  • Matsumura, T.; Kamiji, I.; Nakagiri, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 885
  • DOI: 10.1016/j.nima.2017.12.019

A new search for the KL→π0νν¯ and KL→π0X0 decays
journal, February 2017

  • Ahn, J. K.; Baek, K. Y.; Banno, S.
  • Progress of Theoretical and Experimental Physics, Vol. 2017, Issue 2
  • DOI: 10.1093/ptep/ptx001

Re(ϵ K ′ /ϵK) and K → π ν ν ¯ $$ K\to \pi \nu \overline{\nu} $$ in a two-Higgs doublet model
journal, August 2018

  • Chen, Chuan-Hung; Nomura, Takaaki
  • Journal of High Energy Physics, Vol. 2018, Issue 8
  • DOI: 10.1007/JHEP08(2018)145

The J-PARC KOTO experiment
journal, January 2012

  • Yamanaka, T.
  • Progress of Theoretical and Experimental Physics, Vol. 2012, Issue 1
  • DOI: 10.1093/ptep/pts057

Incorporating systematic uncertainties into an upper limit
journal, August 1992

  • Cousins, Robert D.; Highland, Virgil L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 320, Issue 1-2
  • DOI: 10.1016/0168-9002(92)90794-5

Constraints on new physics from $$K \rightarrow \pi \nu {\bar{\nu }}$$ K → π ν ν ¯
journal, June 2018


K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ and K L → π 0 ν ν ¯ $$ {K}_L\to {\pi}^0\nu \overline{\nu} $$ in the Standard Model: status and perspectives
journal, November 2015

  • Buras, Andrzej J.; Buttazzo, Dario; Girrbach-Noe, Jennifer
  • Journal of High Energy Physics, Vol. 2015, Issue 11
  • DOI: 10.1007/JHEP11(2015)033

beyond the standard model
journal, April 1997


Review of Particle Physics
journal, August 2018


Kaon decays in the standard model
journal, March 2012

  • Cirigliano, Vincenzo; Ecker, Gerhard; Neufeld, Helmut
  • Reviews of Modern Physics, Vol. 84, Issue 1
  • DOI: 10.1103/RevModPhys.84.399

Introduction to J-PARC
journal, January 2012

  • Nagamiya, Shoji
  • Progress of Theoretical and Experimental Physics, Vol. 2012, Issue 1
  • DOI: 10.1093/ptep/pts025

Geant4 developments and applications
journal, February 2006

  • Allison, J.; Amako, K.; Apostolakis, J.
  • IEEE Transactions on Nuclear Science, Vol. 53, Issue 1
  • DOI: 10.1109/TNS.2006.869826

Footprints of leptoquarks: from $$ R_{K^{(*)}} $$ R K ( ∗ ) to $$ K \rightarrow \pi \nu \bar{\nu }$$ K → π ν ν ¯
journal, March 2018


Status of the J-PARC KOTO experiment
journal, January 2017


Gluino-mediated electroweak penguin with flavor-violating trilinear couplings
journal, April 2018

  • Endo, Motoi; Goto, Toru; Kitahara, Teppei
  • Journal of High Energy Physics, Vol. 2018, Issue 4
  • DOI: 10.1007/JHEP04(2018)019

A new cylindrical photon-veto detector for the KOTO experiment
journal, January 2017


The Data Acquisition System of the KOTO Experiment and the RCE Platform Technology Upgrade
journal, June 2017

  • Su, Stephanie; Ameel, Jon; Beechert, Jacqueline
  • IEEE Transactions on Nuclear Science, Vol. 64, Issue 6
  • DOI: 10.1109/TNS.2017.2694040

Reduction of neutron-induced background in KOTO
journal, January 2017


Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

K π ν ν ¯ in the MSSM in light of the ε K / ε K anomaly
journal, July 2017

  • Crivellin, Andreas; D’Ambrosio, Giancarlo; Kitahara, Teppei
  • Physical Review D, Vol. 96, Issue 1
  • DOI: 10.1103/PhysRevD.96.015023

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

  • Shiomi, K.; Baek, K. Y.; Comfort, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 664, Issue 1
  • DOI: 10.1016/j.nima.2011.11.010

The Data Acquisition System for the KOTO Experiment
journal, June 2015

  • Sugiyama, Yasuyuki; Xu, Jia; Tecchio, Monica
  • IEEE Transactions on Nuclear Science, Vol. 62, Issue 3
  • DOI: 10.1109/TNS.2015.2417312

Study of the decay K + π + ν ν ¯ in the momentum region 140 < P π < 199 MeV / c
journal, May 2009


Development of a low-mass and high-efficiency charged-particle detector
journal, February 2016

  • Naito, D.; Maeda, Y.; Kawasaki, N.
  • Progress of Theoretical and Experimental Physics, Vol. 2016, Issue 2
  • DOI: 10.1093/ptep/ptv191

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

  • Shimogawa, T.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 623, Issue 1
  • DOI: 10.1016/j.nima.2010.03.078

Long-lived neutral-kaon flux measurement for the KOTO experiment
journal, January 2015

  • Masuda, T.; Ahn, J. K.; Banno, S.
  • Progress of Theoretical and Experimental Physics, Vol. 2016, Issue 1
  • DOI: 10.1093/ptep/ptv171

Probing SUSY with 10 TeV stop mass in rare decays and CP violation of kaon
journal, December 2016

  • Tanimoto, Morimitsu; Yamamoto, Kei
  • Progress of Theoretical and Experimental Physics, Vol. 2016, Issue 12
  • DOI: 10.1093/ptep/ptw160

    Works referencing / citing this record:

    Tests of discrete symmetries
    journal, November 2019


    Physics beyond colliders at CERN: beyond the Standard Model working group report
    journal, December 2019

    • Beacham, J.; Burrage, C.; Curtin, D.
    • Journal of Physics G: Nuclear and Particle Physics, Vol. 47, Issue 1
    • DOI: 10.1088/1361-6471/ab4cd2

    Real-time correction of betatron tune ripples on a slowly extracted beam
    journal, July 2019


    Flavor-changing hyperon decays with light invisible bosons
    journal, October 2019


    New Physics Implications of Recent Search for K L π 0 ν ν ¯ at KOTO
    journal, February 2020


    Opportunities for Lattice QCD in quark and lepton flavor physics
    journal, November 2019


      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.