Search for a light pseudoscalar particle in the decay KL0→π0π0X

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

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Abstract

We performed a search for a light pseudoscalar particle X in the decay KL0→π0π0X, X→γγ with the E391a detector at KEK. Such a particle with a mass of 214.3MeV/c2 was suggested by the HyperCP experiment. We found no evidence for X and set an upper limit on the product branching ratio for KL0→π0π0X, X→γγ of 2.4×10-7 at the 90% confidence level. Upper limits on the branching ratios in the mass region of X from 194.3 to 219.3MeV/c2 are also presented.

Original languageEnglish
Article number051802
JournalPhysical Review Letters
Volume102
Issue number5
DOIs
Publication statusPublished - 2009 Feb 2
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Tung, Y. C., Hsiung, Y. B., Wu, M. L., Chen, K. F., Ahn, J. K., Akune, Y., ... Zheng, Y. (2009). Search for a light pseudoscalar particle in the decay KL0→π0π0X. Physical Review Letters, 102(5), [051802]. https://doi.org/10.1103/PhysRevLett.102.051802

Search for a light pseudoscalar particle in the decay KL0→π0π0X. / Tung, Y. C.; Hsiung, Y. B.; Wu, M. L.; Chen, K. F.; Ahn, Jung Keun; Akune, Y.; Baranov, V.; Comfort, J.; Doroshenko, M.; Fujioka, Y.; Inagaki, T.; Ishibashi, S.; Ishihara, N.; Ishii, H.; Iwai, E.; Iwata, T.; Kato, I.; Kobayashi, 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.; Nakano, T.; Nanjo, H.; Nix, J.; Nomura, T.; Nomachi, M.; Ogata, R.; Okuno, H.; Omata, K.; Perdue, G. N.; Podolsky, S.; Sakashita, K.; Sasaki, T.; Sasao, N.; Sato, H.; Sato, T.; Sekimoto, M.; Shinkawa, T.; Sugaya, Y.; Sugiyama, A.; Sumida, T.; Suzuki, S.; Tajima, Y.; Takita, S.; Tsamalaidze, Z.; Tsukamoto, T.; Wah, Y.; Watanabe, H.; Yamaga, M.; Yamanaka, T.; Yoshida, H. Y.; Yoshimura, Y.; Zheng, Y.

In: Physical Review Letters, Vol. 102, No. 5, 051802, 02.02.2009.

Research output: Contribution to journalArticle

Tung, YC, Hsiung, YB, Wu, ML, Chen, KF, Ahn, JK, Akune, Y, Baranov, V, Comfort, J, Doroshenko, M, Fujioka, Y, Inagaki, T, Ishibashi, S, Ishihara, N, Ishii, H, Iwai, E, Iwata, T, Kato, I, Kobayashi, 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, Nakano, T, Nanjo, H, Nix, J, Nomura, T, Nomachi, M, Ogata, R, Okuno, H, Omata, K, Perdue, GN, Podolsky, S, Sakashita, K, Sasaki, T, Sasao, N, Sato, H, Sato, T, Sekimoto, M, Shinkawa, T, Sugaya, Y, Sugiyama, A, Sumida, T, Suzuki, S, Tajima, Y, Takita, S, Tsamalaidze, Z, Tsukamoto, T, Wah, Y, Watanabe, H, Yamaga, M, Yamanaka, T, Yoshida, HY, Yoshimura, Y & Zheng, Y 2009, 'Search for a light pseudoscalar particle in the decay KL0→π0π0X', Physical Review Letters, vol. 102, no. 5, 051802. https://doi.org/10.1103/PhysRevLett.102.051802
Tung, Y. C. ; Hsiung, Y. B. ; Wu, M. L. ; Chen, K. F. ; Ahn, Jung Keun ; Akune, Y. ; Baranov, V. ; Comfort, J. ; Doroshenko, M. ; Fujioka, Y. ; Inagaki, T. ; Ishibashi, S. ; Ishihara, N. ; Ishii, H. ; Iwai, E. ; Iwata, T. ; Kato, I. ; Kobayashi, 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. ; Nakano, T. ; Nanjo, H. ; Nix, J. ; Nomura, T. ; Nomachi, M. ; Ogata, R. ; Okuno, H. ; Omata, K. ; Perdue, G. N. ; Podolsky, S. ; Sakashita, K. ; Sasaki, T. ; Sasao, N. ; Sato, H. ; Sato, T. ; Sekimoto, M. ; Shinkawa, T. ; Sugaya, Y. ; Sugiyama, A. ; Sumida, T. ; Suzuki, S. ; Tajima, Y. ; Takita, S. ; Tsamalaidze, Z. ; Tsukamoto, T. ; Wah, Y. ; Watanabe, H. ; Yamaga, M. ; Yamanaka, T. ; Yoshida, H. Y. ; Yoshimura, Y. ; Zheng, Y. / Search for a light pseudoscalar particle in the decay KL0→π0π0X. In: Physical Review Letters. 2009 ; Vol. 102, No. 5.
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title = "Search for a light pseudoscalar particle in the decay KL0→π0π0X",
abstract = "We performed a search for a light pseudoscalar particle X in the decay KL0→π0π0X, X→γγ with the E391a detector at KEK. Such a particle with a mass of 214.3MeV/c2 was suggested by the HyperCP experiment. We found no evidence for X and set an upper limit on the product branching ratio for KL0→π0π0X, X→γγ of 2.4×10-7 at the 90{\%} confidence level. Upper limits on the branching ratios in the mass region of X from 194.3 to 219.3MeV/c2 are also presented.",
author = "Tung, {Y. C.} and Hsiung, {Y. B.} and Wu, {M. L.} and Chen, {K. F.} and Ahn, {Jung Keun} and Y. Akune and V. Baranov and J. Comfort and M. Doroshenko and Y. Fujioka 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 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 T. Nakano and H. Nanjo and J. Nix and T. Nomura and M. Nomachi and R. Ogata and H. Okuno and K. Omata and Perdue, {G. N.} and S. Podolsky and K. Sakashita and T. Sasaki and N. Sasao and H. Sato and T. Sato and M. Sekimoto and T. Shinkawa and Y. Sugaya and A. Sugiyama and T. Sumida and S. Suzuki and Y. Tajima and S. Takita and Z. Tsamalaidze and T. Tsukamoto and Y. Wah and H. Watanabe and M. Yamaga and T. Yamanaka and Yoshida, {H. Y.} and Y. Yoshimura and Y. Zheng",
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T1 - Search for a light pseudoscalar particle in the decay KL0→π0π0X

AU - Tung, Y. C.

AU - Hsiung, Y. B.

AU - Wu, M. L.

AU - Chen, K. F.

AU - Ahn, Jung Keun

AU - Akune, Y.

AU - Baranov, V.

AU - Comfort, J.

AU - Doroshenko, M.

AU - Fujioka, Y.

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 - 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 - Nakano, T.

AU - Nanjo, H.

AU - Nix, J.

AU - Nomura, T.

AU - Nomachi, M.

AU - Ogata, R.

AU - Okuno, H.

AU - Omata, K.

AU - Perdue, G. N.

AU - Podolsky, S.

AU - Sakashita, K.

AU - Sasaki, T.

AU - Sasao, N.

AU - Sato, H.

AU - Sato, T.

AU - Sekimoto, M.

AU - Shinkawa, T.

AU - Sugaya, Y.

AU - Sugiyama, A.

AU - Sumida, T.

AU - Suzuki, S.

AU - Tajima, Y.

AU - Takita, S.

AU - Tsamalaidze, Z.

AU - Tsukamoto, T.

AU - Wah, Y.

AU - Watanabe, H.

AU - Yamaga, M.

AU - Yamanaka, T.

AU - Yoshida, H. Y.

AU - Yoshimura, Y.

AU - Zheng, Y.

PY - 2009/2/2

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N2 - We performed a search for a light pseudoscalar particle X in the decay KL0→π0π0X, X→γγ with the E391a detector at KEK. Such a particle with a mass of 214.3MeV/c2 was suggested by the HyperCP experiment. We found no evidence for X and set an upper limit on the product branching ratio for KL0→π0π0X, X→γγ of 2.4×10-7 at the 90% confidence level. Upper limits on the branching ratios in the mass region of X from 194.3 to 219.3MeV/c2 are also presented.

AB - We performed a search for a light pseudoscalar particle X in the decay KL0→π0π0X, X→γγ with the E391a detector at KEK. Such a particle with a mass of 214.3MeV/c2 was suggested by the HyperCP experiment. We found no evidence for X and set an upper limit on the product branching ratio for KL0→π0π0X, X→γγ of 2.4×10-7 at the 90% confidence level. Upper limits on the branching ratios in the mass region of X from 194.3 to 219.3MeV/c2 are also presented.

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