Measurement of CP asymmetries in B0→K0π0 decays

M. Fujikawa, Y. Yusa, J. Dalseno, M. Hazumi, K. Sumisawa, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, T. E. Browder & 108 others Y. Chao, A. Chen, B. G. Cheon, S. K. Choi, Y. Choi, W. Dungel, S. Eidelman, M. Feindt, P. Goldenzweig, H. Ha, J. Haba, B. Y. Han, K. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Julius, J. H. Kang, H. Kawai, C. Kiesling, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, M. Kreps, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, Y. J. Kwon, S. H. Kyeong, S. H. Lee, J. Li, C. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, M. Rozanska, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, J. B. Singh, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, Eunil Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, A. Zupanc

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We report measurements of CP violation parameters in B0→K0π0 decays based on a data sample of 657×106BB̄ pairs collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We use B0→KS0π0 decays for both mixing-induced and direct CP violating asymmetry measurements and B0→KL0π0 decays for the direct CP violation measurement. The CP violation parameters obtained are sin 2 1eff=+0.67±0. 31(stat)±0.08(syst) and AK0π0=+0.14±0.13(stat)±0. 06(syst). The branching fraction of B0→K0π0 decay is measured to be B(B0→K0π0)=(8.7±0.5(stat.)±0.6(syst.))×10 -6. The observed AK0π0 value differs by 1.9 standard deviations from the value expected from an isospin sum rule.

Original languageEnglish
Article number011101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume81
Issue number1
DOIs
Publication statusPublished - 2010 Jan 22

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CP violation
asymmetry
decay
sum rules
standard deviation
detectors
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Fujikawa, M., Yusa, Y., Dalseno, J., Hazumi, M., Sumisawa, K., Aihara, H., ... Zupanc, A. (2010). Measurement of CP asymmetries in B0→K0π0 decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 81(1), [011101]. https://doi.org/10.1103/PhysRevD.81.011101

Measurement of CP asymmetries in B0→K0π0 decays. / Fujikawa, M.; Yusa, Y.; Dalseno, J.; Hazumi, M.; Sumisawa, K.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Aziz, T.; Bakich, A. M.; Balagura, V.; Barberio, E.; Belous, K.; Bhardwaj, V.; Bischofberger, M.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Chao, Y.; Chen, A.; Cheon, B. G.; Choi, S. K.; Choi, Y.; Dungel, W.; Eidelman, S.; Feindt, M.; Goldenzweig, P.; Ha, H.; Haba, J.; Han, B. Y.; Hara, K.; Hasegawa, Y.; Hayasaka, K.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W. S.; Hyun, H. J.; Iijima, T.; Inami, K.; Ishino, H.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Julius, T.; Kang, J. H.; Kawai, H.; Kiesling, C.; Kim, H. O.; Kim, S. K.; Kim, Y. I.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Korpar, S.; Kreps, M.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumita, T.; Kwon, Y. J.; Kyeong, S. H.; Lee, S. H.; Li, J.; Liu, C.; Liventsev, D.; Louvot, R.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mori, T.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Nishida, S.; Nishimura, K.; Nitoh, O.; Nozaki, T.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H.; Park, H. K.; Pestotnik, R.; Piilonen, L. E.; Rozanska, M.; Sakai, Y.; Schneider, O.; Schwartz, A. J.; Senyo, K.; Shapkin, M.; Shebalin, V.; Shen, C. P.; Shiu, J. G.; Singh, J. B.; Sokolov, A.; Solovieva, E.; Stanič, S.; Starič, M.; Sumiyoshi, T.; Taylor, G. N.; Teramoto, Y.; Trabelsi, K.; Uehara, S.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Varner, G.; Vervink, K.; Vinokurova, A.; Wang, C. H.; Wang, P.; Watanabe, Y.; Wedd, R.; Won, Eunil; Yabsley, B. D.; Yamashita, Y.; Zhang, C. C.; Zhang, Z. P.; Zupanc, A.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 81, No. 1, 011101, 22.01.2010.

Research output: Contribution to journalArticle

Fujikawa, M, Yusa, Y, Dalseno, J, Hazumi, M, Sumisawa, K, Aihara, H, Arinstein, K, Aulchenko, V, Aushev, T, Aziz, T, Bakich, AM, Balagura, V, Barberio, E, Belous, K, Bhardwaj, V, Bischofberger, M, Bondar, A, Bozek, A, Bračko, M, Browder, TE, Chao, Y, Chen, A, Cheon, BG, Choi, SK, Choi, Y, Dungel, W, Eidelman, S, Feindt, M, Goldenzweig, P, Ha, H, Haba, J, Han, BY, Hara, K, Hasegawa, Y, Hayasaka, K, Hayashii, H, Horii, Y, Hoshi, Y, Hou, WS, Hyun, HJ, Iijima, T, Inami, K, Ishino, H, Itoh, R, Iwasaki, M, Iwasaki, Y, Julius, T, Kang, JH, Kawai, H, Kiesling, C, Kim, HO, Kim, SK, Kim, YI, Kim, YJ, Kinoshita, K, Ko, BR, Korpar, S, Kreps, M, Krokovny, P, Kuhr, T, Kumar, R, Kumita, T, Kwon, YJ, Kyeong, SH, Lee, SH, Li, J, Liu, C, Liventsev, D, Louvot, R, McOnie, S, Miyabayashi, K, Miyata, H, Miyazaki, Y, Mori, T, Nagasaka, Y, Nakano, E, Nakao, M, Nishida, S, Nishimura, K, Nitoh, O, Nozaki, T, Ohshima, T, Okuno, S, Olsen, SL, Ozaki, H, Pakhlov, P, Pakhlova, G, Park, CW, Park, H, Park, HK, Pestotnik, R, Piilonen, LE, Rozanska, M, Sakai, Y, Schneider, O, Schwartz, AJ, Senyo, K, Shapkin, M, Shebalin, V, Shen, CP, Shiu, JG, Singh, JB, Sokolov, A, Solovieva, E, Stanič, S, Starič, M, Sumiyoshi, T, Taylor, GN, Teramoto, Y, Trabelsi, K, Uehara, S, Unno, Y, Uno, S, Urquijo, P, Usov, Y, Varner, G, Vervink, K, Vinokurova, A, Wang, CH, Wang, P, Watanabe, Y, Wedd, R, Won, E, Yabsley, BD, Yamashita, Y, Zhang, CC, Zhang, ZP & Zupanc, A 2010, 'Measurement of CP asymmetries in B0→K0π0 decays', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 81, no. 1, 011101. https://doi.org/10.1103/PhysRevD.81.011101
Fujikawa, M. ; Yusa, Y. ; Dalseno, J. ; Hazumi, M. ; Sumisawa, K. ; Aihara, H. ; Arinstein, K. ; Aulchenko, V. ; Aushev, T. ; Aziz, T. ; Bakich, A. M. ; Balagura, V. ; Barberio, E. ; Belous, K. ; Bhardwaj, V. ; Bischofberger, M. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Chao, Y. ; Chen, A. ; Cheon, B. G. ; Choi, S. K. ; Choi, Y. ; Dungel, W. ; Eidelman, S. ; Feindt, M. ; Goldenzweig, P. ; Ha, H. ; Haba, J. ; Han, B. Y. ; Hara, K. ; Hasegawa, Y. ; Hayasaka, K. ; Hayashii, H. ; Horii, Y. ; Hoshi, Y. ; Hou, W. S. ; Hyun, H. J. ; Iijima, T. ; Inami, K. ; Ishino, H. ; Itoh, R. ; Iwasaki, M. ; Iwasaki, Y. ; Julius, T. ; Kang, J. H. ; Kawai, H. ; Kiesling, C. ; Kim, H. O. ; Kim, S. K. ; Kim, Y. I. ; Kim, Y. J. ; Kinoshita, K. ; Ko, B. R. ; Korpar, S. ; Kreps, M. ; Krokovny, P. ; Kuhr, T. ; Kumar, R. ; Kumita, T. ; Kwon, Y. J. ; Kyeong, S. H. ; Lee, S. H. ; Li, J. ; Liu, C. ; Liventsev, D. ; Louvot, R. ; McOnie, S. ; Miyabayashi, K. ; Miyata, H. ; Miyazaki, Y. ; Mori, T. ; Nagasaka, Y. ; Nakano, E. ; Nakao, M. ; Nishida, S. ; Nishimura, K. ; Nitoh, O. ; Nozaki, T. ; Ohshima, T. ; Okuno, S. ; Olsen, S. L. ; Ozaki, H. ; Pakhlov, P. ; Pakhlova, G. ; Park, C. W. ; Park, H. ; Park, H. K. ; Pestotnik, R. ; Piilonen, L. E. ; Rozanska, M. ; Sakai, Y. ; Schneider, O. ; Schwartz, A. J. ; Senyo, K. ; Shapkin, M. ; Shebalin, V. ; Shen, C. P. ; Shiu, J. G. ; Singh, J. B. ; Sokolov, A. ; Solovieva, E. ; Stanič, S. ; Starič, M. ; Sumiyoshi, T. ; Taylor, G. N. ; Teramoto, Y. ; Trabelsi, K. ; Uehara, S. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Usov, Y. ; Varner, G. ; Vervink, K. ; Vinokurova, A. ; Wang, C. H. ; Wang, P. ; Watanabe, Y. ; Wedd, R. ; Won, Eunil ; Yabsley, B. D. ; Yamashita, Y. ; Zhang, C. C. ; Zhang, Z. P. ; Zupanc, A. / Measurement of CP asymmetries in B0→K0π0 decays. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2010 ; Vol. 81, No. 1.
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abstract = "We report measurements of CP violation parameters in B0→K0π0 decays based on a data sample of 657×106BB̄ pairs collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We use B0→KS0π0 decays for both mixing-induced and direct CP violating asymmetry measurements and B0→KL0π0 decays for the direct CP violation measurement. The CP violation parameters obtained are sin 2 1eff=+0.67±0. 31(stat)±0.08(syst) and AK0π0=+0.14±0.13(stat)±0. 06(syst). The branching fraction of B0→K0π0 decay is measured to be B(B0→K0π0)=(8.7±0.5(stat.)±0.6(syst.))×10 -6. The observed AK0π0 value differs by 1.9 standard deviations from the value expected from an isospin sum rule.",
author = "M. Fujikawa and Y. Yusa and J. Dalseno and M. Hazumi and K. Sumisawa and H. Aihara and K. Arinstein and V. Aulchenko and T. Aushev and T. Aziz and Bakich, {A. M.} and V. Balagura and E. Barberio and K. Belous and V. Bhardwaj and M. Bischofberger and A. Bondar and A. Bozek and M. Bračko and Browder, {T. E.} and Y. Chao and A. Chen and Cheon, {B. G.} and Choi, {S. K.} and Y. Choi and W. Dungel and S. Eidelman and M. Feindt and P. Goldenzweig and H. Ha and J. Haba and Han, {B. Y.} and K. Hara and Y. Hasegawa and K. Hayasaka and H. Hayashii and Y. Horii and Y. Hoshi and Hou, {W. S.} and Hyun, {H. J.} and T. Iijima and K. Inami and H. Ishino and R. Itoh and M. Iwasaki and Y. Iwasaki and T. Julius and Kang, {J. H.} and H. Kawai and C. Kiesling and Kim, {H. O.} and Kim, {S. K.} and Kim, {Y. I.} and Kim, {Y. J.} and K. Kinoshita and Ko, {B. R.} and S. Korpar and M. Kreps and P. Krokovny and T. Kuhr and R. Kumar and T. Kumita and Kwon, {Y. J.} and Kyeong, {S. H.} and Lee, {S. H.} and J. Li and C. Liu and D. Liventsev and R. Louvot and S. McOnie and K. Miyabayashi and H. Miyata and Y. Miyazaki and T. Mori and Y. Nagasaka and E. Nakano and M. Nakao and S. Nishida and K. Nishimura and O. Nitoh and T. Nozaki and T. Ohshima and S. Okuno and Olsen, {S. L.} and H. Ozaki and P. Pakhlov and G. Pakhlova and Park, {C. W.} and H. Park and Park, {H. K.} and R. Pestotnik and Piilonen, {L. E.} and M. Rozanska and Y. Sakai and O. Schneider and Schwartz, {A. J.} and K. Senyo and M. Shapkin and V. Shebalin and Shen, {C. P.} and Shiu, {J. G.} and Singh, {J. B.} and A. Sokolov and E. Solovieva and S. Stanič and M. Starič and T. Sumiyoshi and Taylor, {G. N.} and Y. Teramoto and K. Trabelsi and S. Uehara and Y. Unno and S. Uno and P. Urquijo and Y. Usov and G. Varner and K. Vervink and A. Vinokurova and Wang, {C. H.} and P. Wang and Y. Watanabe and R. Wedd and Eunil Won and Yabsley, {B. D.} and Y. Yamashita and Zhang, {C. C.} and Zhang, {Z. P.} and A. Zupanc",
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T1 - Measurement of CP asymmetries in B0→K0π0 decays

AU - Fujikawa, M.

AU - Yusa, Y.

AU - Dalseno, J.

AU - Hazumi, M.

AU - Sumisawa, K.

AU - Aihara, H.

AU - Arinstein, K.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Aziz, T.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Barberio, E.

AU - Belous, K.

AU - Bhardwaj, V.

AU - Bischofberger, M.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chao, Y.

AU - Chen, A.

AU - Cheon, B. G.

AU - Choi, S. K.

AU - Choi, Y.

AU - Dungel, W.

AU - Eidelman, S.

AU - Feindt, M.

AU - Goldenzweig, P.

AU - Ha, H.

AU - Haba, J.

AU - Han, B. Y.

AU - Hara, K.

AU - Hasegawa, Y.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Inami, K.

AU - Ishino, H.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Julius, T.

AU - Kang, J. H.

AU - Kawai, H.

AU - Kiesling, C.

AU - Kim, H. O.

AU - Kim, S. K.

AU - Kim, Y. I.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Ko, B. R.

AU - Korpar, S.

AU - Kreps, M.

AU - Krokovny, P.

AU - Kuhr, T.

AU - Kumar, R.

AU - Kumita, T.

AU - Kwon, Y. J.

AU - Kyeong, S. H.

AU - Lee, S. H.

AU - Li, J.

AU - Liu, C.

AU - Liventsev, D.

AU - Louvot, R.

AU - McOnie, S.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mori, T.

AU - Nagasaka, Y.

AU - Nakano, E.

AU - Nakao, M.

AU - Nishida, S.

AU - Nishimura, K.

AU - Nitoh, O.

AU - Nozaki, T.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H.

AU - Park, H. K.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Rozanska, M.

AU - Sakai, Y.

AU - Schneider, O.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Shapkin, M.

AU - Shebalin, V.

AU - Shen, C. P.

AU - Shiu, J. G.

AU - Singh, J. B.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Stanič, S.

AU - Starič, M.

AU - Sumiyoshi, T.

AU - Taylor, G. N.

AU - Teramoto, Y.

AU - Trabelsi, K.

AU - Uehara, S.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Usov, Y.

AU - Varner, G.

AU - Vervink, K.

AU - Vinokurova, A.

AU - Wang, C. H.

AU - Wang, P.

AU - Watanabe, Y.

AU - Wedd, R.

AU - Won, Eunil

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Zhang, C. C.

AU - Zhang, Z. P.

AU - Zupanc, A.

PY - 2010/1/22

Y1 - 2010/1/22

N2 - We report measurements of CP violation parameters in B0→K0π0 decays based on a data sample of 657×106BB̄ pairs collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We use B0→KS0π0 decays for both mixing-induced and direct CP violating asymmetry measurements and B0→KL0π0 decays for the direct CP violation measurement. The CP violation parameters obtained are sin 2 1eff=+0.67±0. 31(stat)±0.08(syst) and AK0π0=+0.14±0.13(stat)±0. 06(syst). The branching fraction of B0→K0π0 decay is measured to be B(B0→K0π0)=(8.7±0.5(stat.)±0.6(syst.))×10 -6. The observed AK0π0 value differs by 1.9 standard deviations from the value expected from an isospin sum rule.

AB - We report measurements of CP violation parameters in B0→K0π0 decays based on a data sample of 657×106BB̄ pairs collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We use B0→KS0π0 decays for both mixing-induced and direct CP violating asymmetry measurements and B0→KL0π0 decays for the direct CP violation measurement. The CP violation parameters obtained are sin 2 1eff=+0.67±0. 31(stat)±0.08(syst) and AK0π0=+0.14±0.13(stat)±0. 06(syst). The branching fraction of B0→K0π0 decay is measured to be B(B0→K0π0)=(8.7±0.5(stat.)±0.6(syst.))×10 -6. The observed AK0π0 value differs by 1.9 standard deviations from the value expected from an isospin sum rule.

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U2 - 10.1103/PhysRevD.81.011101

DO - 10.1103/PhysRevD.81.011101

M3 - Article

VL - 81

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

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M1 - 011101

ER -