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 & 125 others 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, Eunil Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

Research output: Contribution to journalArticle

37 Citations (Scopus)

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 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 ≡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.

Original languageEnglish
Article number031103
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number3
DOIs
Publication statusPublished - 2013 Feb 21

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays. / 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.; Chao, Y.; Chekelian, V.; Chen, A.; Chen, P.; Cheon, B. G.; Chistov, R.; Cho, I. S.; Cho, K.; Chobanova, V.; Choi, Y.; Doležal, Z.; Drutskoy, A.; Dutta, D.; Eidelman, S.; Farhat, H.; Fast, J. E.; Frey, A.; Gaur, V.; Gillard, R.; Goh, Y. M.; Golob, B.; Haba, J.; Hayasaka, K.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W. S.; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Ishikawa, A.; Julius, T.; Kang, J. H.; Kapusta, P.; Kawasaki, T.; Kim, H. J.; Kim, H. O.; Kim, J. H.; Kim, M. J.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Kodyš, P.; Korpar, S.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumita, T.; Kuzmin, A.; Kwon, Y. J.; Lee, S. H.; 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, S. L.; Pakhlova, G.; Park, H.; Park, H. K.; Pedlar, T. K.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; 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, M. E.; Shapkin, M.; Shebalin, V.; Shen, C. P.; Shibata, T. A.; Shiu, J. G.; Shwartz, B.; Sibidanov, A.; Simon, F.; Smerkol, P.; Sohn, Y. S.; 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, C. H.; Wang, M. Z.; Watanabe, M.; Williams, K. M.; Won, Eunil; Yabsley, B. D.; Yamashita, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 87, No. 3, 031103, 21.02.2013.

Research output: Contribution to journalArticle

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
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. ; Chao, Y. ; Chekelian, V. ; Chen, A. ; Chen, P. ; Cheon, B. G. ; Chistov, R. ; Cho, I. S. ; Cho, K. ; Chobanova, V. ; Choi, Y. ; Doležal, Z. ; Drutskoy, A. ; Dutta, D. ; Eidelman, S. ; Farhat, H. ; Fast, J. E. ; Frey, A. ; Gaur, V. ; Gillard, R. ; Goh, Y. M. ; Golob, B. ; Haba, J. ; Hayasaka, K. ; Hayashii, H. ; Horii, Y. ; Hoshi, Y. ; Hou, W. S. ; Hsiung, Y. B. ; Hyun, H. J. ; Iijima, T. ; Ishikawa, A. ; Julius, T. ; Kang, J. H. ; Kapusta, P. ; Kawasaki, T. ; Kim, H. J. ; Kim, H. O. ; Kim, J. H. ; Kim, M. J. ; Kim, Y. J. ; Kinoshita, K. ; Ko, B. R. ; Kodyš, P. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kuhr, T. ; Kumar, R. ; Kumita, T. ; Kuzmin, A. ; Kwon, Y. J. ; Lee, S. H. ; 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, S. L. ; Pakhlova, G. ; Park, H. ; Park, H. K. ; Pedlar, T. K. ; Pestotnik, R. ; Petrič, M. ; Piilonen, L. E. ; 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, M. E. ; Shapkin, M. ; Shebalin, V. ; Shen, C. P. ; Shibata, T. A. ; Shiu, J. G. ; Shwartz, B. ; Sibidanov, A. ; Simon, F. ; Smerkol, P. ; Sohn, Y. S. ; 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, C. H. ; Wang, M. Z. ; Watanabe, M. ; Williams, K. M. ; Won, Eunil ; Yabsley, B. D. ; Yamashita, Y. ; Zhang, Z. P. ; Zhilich, V. ; Zhulanov, V. ; Zupanc, A. / Measurements of branching fractions and direct CP asymmetries for B→Kπ, B→ππ and B→KK decays. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2013 ; Vol. 87, No. 3.
@article{f40bb78287d949beb366cd1a2aaf4888,
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 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 {\^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/B̄0→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. Bračko 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. Doležal 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. Kodyš and S. Korpar and P. Križan 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. Petrič 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. Starič 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 Eunil Won and Yabsley, {B. D.} and Y. Yamashita and Zhang, {Z. P.} and V. Zhilich and V. Zhulanov and A. Zupanc",
year = "2013",
month = "2",
day = "21",
doi = "10.1103/PhysRevD.87.031103",
language = "English",
volume = "87",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Institute of Physics Publising LLC",
number = "3",

}

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, Eunil

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 - http://www.scopus.com/inward/record.url?scp=84874550161&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874550161&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.87.031103

DO - 10.1103/PhysRevD.87.031103

M3 - Article

VL - 87

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 3

M1 - 031103

ER -