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; 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; E. Won; B. D. Yabsley; Y. Yamashita; C. C. Zhang; Z. P. Zhang; A. Zupanc

doi:10.1103/PhysRevD.81.011101

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. BrowderY. 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, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, A. Zupanc

Department of Physics

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26 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 language	English
Article number	011101
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	81
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.81.011101
Publication status	Published - 2010 Jan 22

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.81.011101

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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., ... Zupanc, A. (2010). Measurement of CP asymmetries in B0→K0π0 decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 81(1), Article 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, 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

@article{1bc0149f5cee4326bb9b7662bf963dcc,

title = "Measurement of CP asymmetries in B0→K0π0 decays",

abstract = "We report measurements of CP violation parameters in B0→K0π0 decays based on a data sample of 657×106B{\=B} 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. Bra{\v c}ko 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. Stani{\v c} and M. Stari{\v c} 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 E. Won and Yabsley, {B. D.} and Y. Yamashita and Zhang, {C. C.} and Zhang, {Z. P.} and A. Zupanc",

year = "2010",

month = jan,

day = "22",

doi = "10.1103/PhysRevD.81.011101",

language = "English",

volume = "81",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Institute of Physics Publising LLC",

number = "1",

}

TY - JOUR

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, E.

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.

UR - http://www.scopus.com/inward/record.url?scp=77649138861&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.81.011101

DO - 10.1103/PhysRevD.81.011101

M3 - Article

AN - SCOPUS:77649138861

SN - 1550-7998

VL - 81

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 1

M1 - 011101

ER -

Measurement of CP asymmetries in B0→K0π0 decays

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