Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays

Y. T. Duh; T. Y. Wu; P. Chang; G. B. Mohanty; Y. Unno; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bračko; T. E. Browder; Y. Chao; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; R. Chistov; I. S. Cho; K. Cho; V. Chobanova; Y. Choi; Z. Doležal; A. Drutskoy; D. Dutta; S. Eidelman; H. Farhat; J. E. Fast; A. Frey; V. Gaur; R. Gillard; Y. M. Goh; B. Golob; J. Haba; K. Hayasaka; H. Hayashii; Y. Horii; Y. Hoshi; W. S. Hou; Y. B. Hsiung; H. J. Hyun; T. Iijima; A. Ishikawa; T. Julius; J. H. Kang; P. Kapusta; T. Kawasaki; H. J. Kim; H. O. Kim; J. H. Kim; M. J. Kim; Y. J. Kim; K. Kinoshita; B. R. Ko; P. Kodyš; S. Korpar; P. Križan; P. Krokovny; T. Kuhr; R. Kumar; T. Kumita; A. Kuzmin; Y. J. Kwon; S. H. Lee; Y. Li; J. Libby; C. Liu; Y. Liu; K. Miyabayashi; H. Miyata; R. Mizuk; T. Mori; N. Muramatsu; E. Nakano; M. Nakao; C. Ng; S. Nishida; K. Nishimura; O. Nitoh; S. Ogawa; T. Ohshima; S. Okuno; S. L. Olsen; G. Pakhlova; H. Park; H. K. Park; T. K. Pedlar; R. Pestotnik; M. Petrič; L. E. Piilonen; M. Prim; M. Ritter; M. Röhrken; S. Ryu; H. Sahoo; Y. Sakai; S. Sandilya; D. Santel; Y. Sato; O. Schneider; C. Schwanda; K. Senyo; M. E. Sevior; M. Shapkin; V. Shebalin; C. P. Shen; T. A. Shibata; J. G. Shiu; B. Shwartz; A. Sibidanov; F. Simon; P. Smerkol; Y. S. Sohn; A. Sokolov; E. Solovieva; M. Starič; M. Sumihama; T. Sumiyoshi; G. Tatishvili; Y. Teramoto; K. Trabelsi; M. Uchida; S. Uehara; S. Uno; P. Vanhoefer; G. Varner; A. Vinokurova; C. H. Wang; M. Z. Wang; M. Watanabe; K. M. Williams; E. Won; B. D. Yabsley; Y. Yamashita; Z. P. Zhang; V. Zhilich; V. Zhulanov; A. Zupanc

doi:10.1103/PhysRevD.87.031103

Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays

Y. T. Duh
, T. Y. Wu
, P. Chang
, G. B. Mohanty
, Y. Unno
, I. Adachi
, H. Aihara
, D. M. Asner
, V. Aulchenko
, T. Aushev
, T. Aziz
, A. M. Bakich
, B. Bhuyan
, M. Bischofberger
, A. Bondar
, G. Bonvicini
, A. Bozek
, M. Bračko
, T. E. Browder
, Y. Chao

V. Chekelian, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I. S. Cho, K. Cho, V. Chobanova, Y. Choi, Z. Doležal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, A. Frey, V. Gaur, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, K. Miyabayashi, H. Miyata, R. Mizuk, T. Mori, N. Muramatsu, E. Nakano, M. Nakao, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Prim, M. Ritter, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, D. Santel, Y. Sato, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. S. Sohn, A. Sokolov, E. Solovieva, M. Starič, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, S. Uno, P. Vanhoefer, G. Varner, A. Vinokurova, C. H. Wang, M. Z. Wang, M. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

Research output: Contribution to journal › Article › peer-review

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Abstract

We report measurements of the branching fractions and direct CP asymmetries (A_CP) for B→Kπ, ππ and KK decays (but not π0π0) based on the final data sample of 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e^- collider. We set a 90% confidence-level upper limit for K⁺K^- at 2.0×10^-7; all other decays are observed with branching fractions ranging from 10^-6 to 10 ^-5. In the B0/B^̄0→K^±π ^â̂ mode, we confirm Belle's previously reported large A_CP with a value of -0.069±0.014±0.007 and a significance of 4.4σ. For all other flavor-specific modes, we find A _CP values consistent with zero, including A_CP(K ⁺π0)=+0.043±0.024±0.007 with 1.8σ significance. The difference of CP asymmetry between B^±→ K^±π0 and B0/B^̄0→K ^±π^â̂ is found to be ΔA _Kπ≡A_CP(K⁺π0)-A_CP(K ⁺π^-)=+0.112±0.027±0.007 with 4.0σ significance. We also calculate the ratios of partial widths for the B→Kπ decays. Using our results, we test the validity of the sum rule A_CP(K⁺π^-)+A_CP(K0π⁺) Γ(K0π⁺)Γ(K⁺π^-)-A _CP(K⁺π0)2Γ(K⁺π0)Γ(K ⁺π^-)-A_CP(K0π0)2Γ(K0π0) Γ(K⁺π^-)=0 and obtain a sum of -0.270±0.132±0.060 with 1.9σ significance.

Original language	English
Article number	031103
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	87
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.87.031103
State	Published - 21 Feb 2013

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10.1103/PhysRevD.87.031103

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Duh, Y. T., Wu, T. Y., Chang, P., Mohanty, G. B., Unno, Y., Adachi, I., Aihara, H., Asner, D. M., Aulchenko, V., Aushev, T., Aziz, T., Bakich, A. M., Bhuyan, B., Bischofberger, M., Bondar, A., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., ... Zupanc, A. (2013). Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 87(3), Article 031103. https://doi.org/10.1103/PhysRevD.87.031103

@article{dc5a133237c1452b9e27aff3d8813f9f,

title = "Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays",

abstract = "We report measurements of the branching fractions and direct CP asymmetries (ACP) for B→Kπ, ππ and KK decays (but not π0π0) based on the final data sample of 772×106 B{\=B} pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We set a 90\% confidence-level upper limit for K+K- at 2.0×10-7; all other decays are observed with branching fractions ranging from 10-6 to 10 -5. In the B0/{\=B}0→K±π {\^a}̂ mode, we confirm Belle's previously reported large ACP with a value of -0.069±0.014±0.007 and a significance of 4.4σ. For all other flavor-specific modes, we find A CP values consistent with zero, including ACP(K +π0)=+0.043±0.024±0.007 with 1.8σ significance. The difference of CP asymmetry between B±→ K±π0 and B0/{\=B}0→K ±π{\^a}̂ is found to be ΔA Kπ≡ACP(K+π0)-ACP(K +π-)=+0.112±0.027±0.007 with 4.0σ significance. We also calculate the ratios of partial widths for the B→Kπ decays. Using our results, we test the validity of the sum rule ACP(K+π-)+ACP(K0π+) Γ(K0π+)Γ(K+π-)-A CP(K+π0)2Γ(K+π0)Γ(K +π-)-ACP(K0π0)2Γ(K0π0) Γ(K+π-)=0 and obtain a sum of -0.270±0.132±0.060 with 1.9σ significance.",

author = "Duh, \{Y. T.\} and Wu, \{T. Y.\} and P. Chang and Mohanty, \{G. B.\} and Y. Unno and I. Adachi and H. Aihara and Asner, \{D. M.\} and V. Aulchenko and T. Aushev and T. Aziz and Bakich, \{A. M.\} and B. Bhuyan and M. Bischofberger and A. Bondar and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and Y. Chao and V. Chekelian and A. Chen and P. Chen and Cheon, \{B. G.\} and R. Chistov and Cho, \{I. S.\} and K. Cho and V. Chobanova and Y. Choi and Z. Dole{\v z}al and A. Drutskoy and D. Dutta and S. Eidelman and H. Farhat and Fast, \{J. E.\} and A. Frey and V. Gaur and R. Gillard and Goh, \{Y. M.\} and B. Golob and J. Haba and K. Hayasaka and H. Hayashii and Y. Horii and Y. Hoshi and Hou, \{W. S.\} and Hsiung, \{Y. B.\} and Hyun, \{H. J.\} and T. Iijima and A. Ishikawa and T. Julius and Kang, \{J. H.\} and P. Kapusta and T. Kawasaki and Kim, \{H. J.\} and Kim, \{H. O.\} and Kim, \{J. H.\} and Kim, \{M. J.\} and Kim, \{Y. J.\} and K. Kinoshita and Ko, \{B. R.\} and P. Kody{\v s} and S. Korpar and P. Kri{\v z}an and P. Krokovny and T. Kuhr and R. Kumar and T. Kumita and A. Kuzmin and Kwon, \{Y. J.\} and Lee, \{S. H.\} and Y. Li and J. Libby and C. Liu and Y. Liu and K. Miyabayashi and H. Miyata and R. Mizuk and T. Mori and N. Muramatsu and E. Nakano and M. Nakao and C. Ng and S. Nishida and K. Nishimura and O. Nitoh and S. Ogawa and T. Ohshima and S. Okuno and Olsen, \{S. L.\} and G. Pakhlova and H. Park and Park, \{H. K.\} and Pedlar, \{T. K.\} and R. Pestotnik and M. Petri{\v c} and Piilonen, \{L. E.\} and M. Prim and M. Ritter and M. R{\"o}hrken and S. Ryu and H. Sahoo and Y. Sakai and S. Sandilya and D. Santel and Y. Sato and O. Schneider and C. Schwanda and K. Senyo and Sevior, \{M. E.\} and M. Shapkin and V. Shebalin and Shen, \{C. P.\} and Shibata, \{T. A.\} and Shiu, \{J. G.\} and B. Shwartz and A. Sibidanov and F. Simon and P. Smerkol and Sohn, \{Y. S.\} and A. Sokolov and E. Solovieva and M. Stari{\v c} and M. Sumihama and T. Sumiyoshi and G. Tatishvili and Y. Teramoto and K. Trabelsi and M. Uchida and S. Uehara and S. Uno and P. Vanhoefer and G. Varner and A. Vinokurova and Wang, \{C. H.\} and Wang, \{M. Z.\} and M. Watanabe and Williams, \{K. M.\} and E. Won and Yabsley, \{B. D.\} and Y. Yamashita and Zhang, \{Z. P.\} and V. Zhilich and V. Zhulanov and A. Zupanc",

year = "2013",

month = feb,

day = "21",

doi = "10.1103/PhysRevD.87.031103",

language = "English",

volume = "87",

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

issn = "1550-7998",

publisher = "American Physical Society",

number = "3",

}

Duh, YT, Wu, TY, Chang, P, Mohanty, GB, Unno, Y, Adachi, I, Aihara, H, Asner, DM, Aulchenko, V, Aushev, T, Aziz, T, Bakich, AM, Bhuyan, B, Bischofberger, M, Bondar, A, Bonvicini, G, Bozek, A, Bračko, M, Browder, TE, Chao, Y, Chekelian, V, Chen, A, Chen, P, Cheon, BG, Chistov, R, Cho, IS, Cho, K, Chobanova, V, Choi, Y, Doležal, Z, Drutskoy, A, Dutta, D, Eidelman, S, Farhat, H, Fast, JE, Frey, A, Gaur, V, Gillard, R, Goh, YM, Golob, B, Haba, J, Hayasaka, K, Hayashii, H, Horii, Y, Hoshi, Y, Hou, WS, Hsiung, YB, Hyun, HJ, Iijima, T, Ishikawa, A, Julius, T, Kang, JH, Kapusta, P, Kawasaki, T, Kim, HJ, Kim, HO, Kim, JH, Kim, MJ, Kim, YJ, Kinoshita, K, Ko, BR, Kodyš, P, Korpar, S, Križan, P, Krokovny, P, Kuhr, T, Kumar, R, Kumita, T, Kuzmin, A, Kwon, YJ, Lee, SH, Li, Y, Libby, J, Liu, C, Liu, Y, Miyabayashi, K, Miyata, H, Mizuk, R, Mori, T, Muramatsu, N, Nakano, E, Nakao, M, Ng, C, Nishida, S, Nishimura, K, Nitoh, O, Ogawa, S, Ohshima, T, Okuno, S, Olsen, SL, Pakhlova, G, Park, H, Park, HK, Pedlar, TK, Pestotnik, R, Petrič, M, Piilonen, LE, Prim, M, Ritter, M, Röhrken, M, Ryu, S, Sahoo, H, Sakai, Y, Sandilya, S, Santel, D, Sato, Y, Schneider, O, Schwanda, C, Senyo, K, Sevior, ME, Shapkin, M, Shebalin, V, Shen, CP, Shibata, TA, Shiu, JG, Shwartz, B, Sibidanov, A, Simon, F, Smerkol, P, Sohn, YS, Sokolov, A, Solovieva, E, Starič, M, Sumihama, M, Sumiyoshi, T, Tatishvili, G, Teramoto, Y, Trabelsi, K, Uchida, M, Uehara, S, Uno, S, Vanhoefer, P, Varner, G, Vinokurova, A, Wang, CH, Wang, MZ, Watanabe, M, Williams, KM, Won, E, Yabsley, BD, Yamashita, Y, Zhang, ZP, Zhilich, V, Zhulanov, V & Zupanc, A 2013, 'Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 87, no. 3, 031103. https://doi.org/10.1103/PhysRevD.87.031103

TY - JOUR

T1 - Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays

AU - Duh, Y. T.

AU - Wu, T. Y.

AU - Chang, P.

AU - Mohanty, G. B.

AU - Unno, Y.

AU - Adachi, I.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Aziz, T.

AU - Bakich, A. M.

AU - Bhuyan, B.

AU - Bischofberger, M.

AU - Bondar, A.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chao, Y.

AU - Chekelian, V.

AU - Chen, A.

AU - Chen, P.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Cho, I. S.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, Y.

AU - Doležal, Z.

AU - Drutskoy, A.

AU - Dutta, D.

AU - Eidelman, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Frey, A.

AU - Gaur, V.

AU - Gillard, R.

AU - Goh, Y. M.

AU - Golob, B.

AU - Haba, J.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hsiung, Y. B.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Ishikawa, A.

AU - Julius, T.

AU - Kang, J. H.

AU - Kapusta, P.

AU - Kawasaki, T.

AU - Kim, H. J.

AU - Kim, H. O.

AU - Kim, J. H.

AU - Kim, M. J.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Ko, B. R.

AU - Kodyš, P.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kuhr, T.

AU - Kumar, R.

AU - Kumita, T.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lee, S. H.

AU - Li, Y.

AU - Libby, J.

AU - Liu, C.

AU - Liu, Y.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Mizuk, R.

AU - Mori, T.

AU - Muramatsu, N.

AU - Nakano, E.

AU - Nakao, M.

AU - Ng, C.

AU - Nishida, S.

AU - Nishimura, K.

AU - Nitoh, O.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Pakhlova, G.

AU - Park, H.

AU - Park, H. K.

AU - Pedlar, T. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Prim, M.

AU - Ritter, M.

AU - Röhrken, M.

AU - Ryu, S.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Sandilya, S.

AU - Santel, D.

AU - Sato, Y.

AU - Schneider, O.

AU - Schwanda, C.

AU - Senyo, K.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shebalin, V.

AU - Shen, C. P.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Sibidanov, A.

AU - Simon, F.

AU - Smerkol, P.

AU - Sohn, Y. S.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Starič, M.

AU - Sumihama, M.

AU - Sumiyoshi, T.

AU - Tatishvili, G.

AU - Teramoto, Y.

AU - Trabelsi, K.

AU - Uchida, M.

AU - Uehara, S.

AU - Uno, S.

AU - Vanhoefer, P.

AU - Varner, G.

AU - Vinokurova, A.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Watanabe, M.

AU - Williams, K. M.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zhulanov, V.

AU - Zupanc, A.

PY - 2013/2/21

Y1 - 2013/2/21

N2 - We report measurements of the branching fractions and direct CP asymmetries (ACP) for B→Kπ, ππ and KK decays (but not π0π0) based on the final data sample of 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We set a 90% confidence-level upper limit for K+K- at 2.0×10-7; all other decays are observed with branching fractions ranging from 10-6 to 10 -5. In the B0/B̄0→K±π â̂ mode, we confirm Belle's previously reported large ACP with a value of -0.069±0.014±0.007 and a significance of 4.4σ. For all other flavor-specific modes, we find A CP values consistent with zero, including ACP(K +π0)=+0.043±0.024±0.007 with 1.8σ significance. The difference of CP asymmetry between B±→ K±π0 and B0/B̄0→K ±πâ̂ is found to be ΔA Kπ≡ACP(K+π0)-ACP(K +π-)=+0.112±0.027±0.007 with 4.0σ significance. We also calculate the ratios of partial widths for the B→Kπ decays. Using our results, we test the validity of the sum rule ACP(K+π-)+ACP(K0π+) Γ(K0π+)Γ(K+π-)-A CP(K+π0)2Γ(K+π0)Γ(K +π-)-ACP(K0π0)2Γ(K0π0) Γ(K+π-)=0 and obtain a sum of -0.270±0.132±0.060 with 1.9σ significance.

AB - We report measurements of the branching fractions and direct CP asymmetries (ACP) for B→Kπ, ππ and KK decays (but not π0π0) based on the final data sample of 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We set a 90% confidence-level upper limit for K+K- at 2.0×10-7; all other decays are observed with branching fractions ranging from 10-6 to 10 -5. In the B0/B̄0→K±π â̂ mode, we confirm Belle's previously reported large ACP with a value of -0.069±0.014±0.007 and a significance of 4.4σ. For all other flavor-specific modes, we find A CP values consistent with zero, including ACP(K +π0)=+0.043±0.024±0.007 with 1.8σ significance. The difference of CP asymmetry between B±→ K±π0 and B0/B̄0→K ±πâ̂ is found to be ΔA Kπ≡ACP(K+π0)-ACP(K +π-)=+0.112±0.027±0.007 with 4.0σ significance. We also calculate the ratios of partial widths for the B→Kπ decays. Using our results, we test the validity of the sum rule ACP(K+π-)+ACP(K0π+) Γ(K0π+)Γ(K+π-)-A CP(K+π0)2Γ(K+π0)Γ(K +π-)-ACP(K0π0)2Γ(K0π0) Γ(K+π-)=0 and obtain a sum of -0.270±0.132±0.060 with 1.9σ significance.

UR - https://www.scopus.com/pages/publications/84874550161

U2 - 10.1103/PhysRevD.87.031103

DO - 10.1103/PhysRevD.87.031103

M3 - Article

AN - SCOPUS:84874550161

SN - 1550-7998

VL - 87

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

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

IS - 3

M1 - 031103

ER -

Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays

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