Study of the KL0→π0π0νν̄ decay

R. Ogata, S. Suzuki, J. K. Ahn, Y. Akune, V. Baranov, K. F. Chen, J. Comfort, M. Doroshenko, Y. Fujioka, Y. B. Hsiung, T. Inagaki, S. Ishibashi, N. Ishihara, H. Ishii, E. Iwai, T. Iwata, I. Kato, S. Kobayashi, S. Komatsu, T. K. Komatsubara & 49 others A. S. Kurilin, E. Kuzmin, A. Lednev, H. S. Lee, S. Y. Lee, G. Y. Lim, J. Ma, T. Matsumura, A. Moisseenko, H. Morii, T. Morimoto, Y. Nakajima, T. Nakano, H. Nanjo, N. Nishi, J. Nix, T. Nomura, M. Nomachi, H. Okuno, K. Omata, G. N. Perdue, S. Perov, S. Podolsky, S. Porokhovoy, K. Sakashita, T. Sasaki, N. Sasao, H. Sato, T. Sato, M. Sekimoto, T. Shimogawa, T. Shinkawa, Y. Stepanenko, Y. Sugaya, A. Sugiyama, T. Sumida, Y. Tajima, S. Takita, Z. Tsamalaidze, T. Tsukamoto, Y. C. Tung, Y. W. Wah, H. Watanabe, M. L. Wu, M. Yamaga, T. Yamanaka, H. Y. Yoshida, Y. Yoshimura, Y. Zheng

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Abstract

The rare decay KL0→π0π0νν̄ was studied with the E391a detector at the KEK 12-GeV proton synchrotron. Based on 9.4×109 KL0 decays, an upper limit of 8.1×10-7 was obtained for the branching fraction at 90% confidence level. We also set a limit on the KL0→π0π0X (X→invisible particles) process; the limit on the branching fraction varied from 7.0×10-7 to 4.0×10 -5 for the mass of X ranging from 50MeV/c2 to 200MeV/c2.

Original languageEnglish (US)
Article number052009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Issue number5
DOIs
StatePublished - Sep 21 2011

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decay
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synchrotrons
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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Ogata, R., Suzuki, S., Ahn, J. K., Akune, Y., Baranov, V., Chen, K. F., ... Zheng, Y. (2011). Study of the KL0→π0π0νν̄ decay. Physical Review D - Particles, Fields, Gravitation and Cosmology, 84(5), [052009]. https://doi.org/10.1103/PhysRevD.84.052009

Study of the KL0→π0π0νν̄ decay. / Ogata, R.; Suzuki, S.; Ahn, J. K.; Akune, Y.; Baranov, V.; Chen, K. F.; Comfort, J.; Doroshenko, M.; Fujioka, Y.; Hsiung, Y. B.; Inagaki, T.; Ishibashi, S.; Ishihara, N.; Ishii, H.; Iwai, E.; Iwata, T.; Kato, I.; Kobayashi, S.; Komatsu, S.; Komatsubara, T. K.; Kurilin, A. S.; Kuzmin, E.; Lednev, A.; Lee, H. S.; Lee, S. Y.; Lim, G. Y.; Ma, J.; Matsumura, T.; Moisseenko, A.; Morii, H.; Morimoto, T.; Nakajima, Y.; Nakano, T.; Nanjo, H.; Nishi, N.; Nix, J.; Nomura, T.; Nomachi, M.; Okuno, H.; Omata, K.; Perdue, G. N.; Perov, S.; Podolsky, S.; Porokhovoy, S.; Sakashita, K.; Sasaki, T.; Sasao, N.; Sato, H.; Sato, T.; Sekimoto, M.; Shimogawa, T.; Shinkawa, T.; Stepanenko, Y.; Sugaya, Y.; Sugiyama, A.; Sumida, T.; Tajima, Y.; Takita, S.; Tsamalaidze, Z.; Tsukamoto, T.; Tung, Y. C.; Wah, Y. W.; Watanabe, H.; Wu, M. L.; Yamaga, M.; Yamanaka, T.; Yoshida, H. Y.; Yoshimura, Y.; Zheng, Y.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 84, No. 5, 052009, 21.09.2011.

Research output: Contribution to journalArticle

Ogata, R, Suzuki, S, Ahn, JK, Akune, Y, Baranov, V, Chen, KF, Comfort, J, Doroshenko, M, Fujioka, Y, Hsiung, YB, Inagaki, T, Ishibashi, S, Ishihara, N, Ishii, H, Iwai, E, Iwata, T, Kato, I, Kobayashi, S, Komatsu, S, Komatsubara, TK, Kurilin, AS, Kuzmin, E, Lednev, A, Lee, HS, Lee, SY, Lim, GY, Ma, J, Matsumura, T, Moisseenko, A, Morii, H, Morimoto, T, Nakajima, Y, Nakano, T, Nanjo, H, Nishi, N, Nix, J, Nomura, T, Nomachi, M, Okuno, H, Omata, K, Perdue, GN, Perov, S, Podolsky, S, Porokhovoy, S, Sakashita, K, Sasaki, T, Sasao, N, Sato, H, Sato, T, Sekimoto, M, Shimogawa, T, Shinkawa, T, Stepanenko, Y, Sugaya, Y, Sugiyama, A, Sumida, T, Tajima, Y, Takita, S, Tsamalaidze, Z, Tsukamoto, T, Tung, YC, Wah, YW, Watanabe, H, Wu, ML, Yamaga, M, Yamanaka, T, Yoshida, HY, Yoshimura, Y & Zheng, Y 2011, 'Study of the KL0→π0π0νν̄ decay', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 84, no. 5, 052009. https://doi.org/10.1103/PhysRevD.84.052009
Ogata, R. ; Suzuki, S. ; Ahn, J. K. ; Akune, Y. ; Baranov, V. ; Chen, K. F. ; Comfort, J. ; Doroshenko, M. ; Fujioka, Y. ; Hsiung, Y. B. ; Inagaki, T. ; Ishibashi, S. ; Ishihara, N. ; Ishii, H. ; Iwai, E. ; Iwata, T. ; Kato, I. ; Kobayashi, S. ; Komatsu, S. ; Komatsubara, T. K. ; Kurilin, A. S. ; Kuzmin, E. ; Lednev, A. ; Lee, H. S. ; Lee, S. Y. ; Lim, G. Y. ; Ma, J. ; Matsumura, T. ; Moisseenko, A. ; Morii, H. ; Morimoto, T. ; Nakajima, Y. ; Nakano, T. ; Nanjo, H. ; Nishi, N. ; Nix, J. ; Nomura, T. ; Nomachi, M. ; Okuno, H. ; Omata, K. ; Perdue, G. N. ; Perov, S. ; Podolsky, S. ; Porokhovoy, S. ; Sakashita, K. ; Sasaki, T. ; Sasao, N. ; Sato, H. ; Sato, T. ; Sekimoto, M. ; Shimogawa, T. ; Shinkawa, T. ; Stepanenko, Y. ; Sugaya, Y. ; Sugiyama, A. ; Sumida, T. ; Tajima, Y. ; Takita, S. ; Tsamalaidze, Z. ; Tsukamoto, T. ; Tung, Y. C. ; Wah, Y. W. ; Watanabe, H. ; Wu, M. L. ; Yamaga, M. ; Yamanaka, T. ; Yoshida, H. Y. ; Yoshimura, Y. ; Zheng, Y. / Study of the KL0→π0π0νν̄ decay. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2011 ; Vol. 84, No. 5.
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title = "Study of the KL0→π0π0νν̄ decay",
abstract = "The rare decay KL0→π0π0νν̄ was studied with the E391a detector at the KEK 12-GeV proton synchrotron. Based on 9.4×109 KL0 decays, an upper limit of 8.1×10-7 was obtained for the branching fraction at 90{\%} confidence level. We also set a limit on the KL0→π0π0X (X→invisible particles) process; the limit on the branching fraction varied from 7.0×10-7 to 4.0×10 -5 for the mass of X ranging from 50MeV/c2 to 200MeV/c2.",
author = "R. Ogata and S. Suzuki and Ahn, {J. K.} and Y. Akune and V. Baranov and Chen, {K. F.} and J. Comfort and M. Doroshenko and Y. Fujioka and Hsiung, {Y. B.} and T. Inagaki and S. Ishibashi and N. Ishihara and H. Ishii and E. Iwai and T. Iwata and I. Kato and S. Kobayashi and S. Komatsu and Komatsubara, {T. K.} and Kurilin, {A. S.} and E. Kuzmin and A. Lednev and Lee, {H. S.} and Lee, {S. Y.} and Lim, {G. Y.} and J. Ma and T. Matsumura and A. Moisseenko and H. Morii and T. Morimoto and Y. Nakajima and T. Nakano and H. Nanjo and N. Nishi and J. Nix and T. Nomura and M. Nomachi and H. Okuno and K. Omata and Perdue, {G. N.} and S. Perov and S. Podolsky and S. Porokhovoy and K. Sakashita and T. Sasaki and N. Sasao and H. Sato and T. Sato and M. Sekimoto and T. Shimogawa and T. Shinkawa and Y. Stepanenko and Y. Sugaya and A. Sugiyama and T. Sumida and Y. Tajima and S. Takita and Z. Tsamalaidze and T. Tsukamoto and Tung, {Y. C.} and Wah, {Y. W.} and H. Watanabe and Wu, {M. L.} and M. Yamaga and T. Yamanaka and Yoshida, {H. Y.} and Y. Yoshimura and Y. Zheng",
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T1 - Study of the KL0→π0π0νν̄ decay

AU - Ogata, R.

AU - Suzuki, S.

AU - Ahn, J. K.

AU - Akune, Y.

AU - Baranov, V.

AU - Chen, K. F.

AU - Comfort, J.

AU - Doroshenko, M.

AU - Fujioka, Y.

AU - Hsiung, Y. B.

AU - Inagaki, T.

AU - Ishibashi, S.

AU - Ishihara, N.

AU - Ishii, H.

AU - Iwai, E.

AU - Iwata, T.

AU - Kato, I.

AU - Kobayashi, S.

AU - Komatsu, S.

AU - Komatsubara, T. K.

AU - Kurilin, A. S.

AU - Kuzmin, E.

AU - Lednev, A.

AU - Lee, H. S.

AU - Lee, S. Y.

AU - Lim, G. Y.

AU - Ma, J.

AU - Matsumura, T.

AU - Moisseenko, A.

AU - Morii, H.

AU - Morimoto, T.

AU - Nakajima, Y.

AU - Nakano, T.

AU - Nanjo, H.

AU - Nishi, N.

AU - Nix, J.

AU - Nomura, T.

AU - Nomachi, M.

AU - Okuno, H.

AU - Omata, K.

AU - Perdue, G. N.

AU - Perov, S.

AU - Podolsky, S.

AU - Porokhovoy, S.

AU - Sakashita, K.

AU - Sasaki, T.

AU - Sasao, N.

AU - Sato, H.

AU - Sato, T.

AU - Sekimoto, M.

AU - Shimogawa, T.

AU - Shinkawa, T.

AU - Stepanenko, Y.

AU - Sugaya, Y.

AU - Sugiyama, A.

AU - Sumida, T.

AU - Tajima, Y.

AU - Takita, S.

AU - Tsamalaidze, Z.

AU - Tsukamoto, T.

AU - Tung, Y. C.

AU - Wah, Y. W.

AU - Watanabe, H.

AU - Wu, M. L.

AU - Yamaga, M.

AU - Yamanaka, T.

AU - Yoshida, H. Y.

AU - Yoshimura, Y.

AU - Zheng, Y.

PY - 2011/9/21

Y1 - 2011/9/21

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AB - The rare decay KL0→π0π0νν̄ was studied with the E391a detector at the KEK 12-GeV proton synchrotron. Based on 9.4×109 KL0 decays, an upper limit of 8.1×10-7 was obtained for the branching fraction at 90% confidence level. We also set a limit on the KL0→π0π0X (X→invisible particles) process; the limit on the branching fraction varied from 7.0×10-7 to 4.0×10 -5 for the mass of X ranging from 50MeV/c2 to 200MeV/c2.

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U2 - 10.1103/PhysRevD.84.052009

DO - 10.1103/PhysRevD.84.052009

M3 - Article

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JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

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