Measurements of branching fractions and CP asymmetries in B→ηh decays

P. Chang, K. Abe, K. Abe, H. Aihara, M. Akatsu, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, Y. Ban, S. Banerjee, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. BrowderY. Chao, A. Chen, K. F. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, R. Guo, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, H. C. Huang, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, S. M. Kim, P. Koppenburg, S. Korpar, P. Krian, P. Krokovny, R. Kulasiri, C. C. Kuo, Y. J. Kwon, S. E. Lee, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, N. Parslow, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, T. Schietinger, O. Schneider, P. Schönmeier, J. Schümann, A. J. Schwartz, K. Senyo, H. Shibuya, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, S. Uehara, T. Uglov, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. Z. Wang, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Ontar

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We report measurements of B to pseudoscalar-pseudoscalar decays with at least one η meson in the final state using 140fb-1 of data collected by the Belle detector at KEKB e+e- collider. We observe the decay B+→ηπ+ and find evidence of B+→ηK+; the measured branching fractions are B(B+→ηπ+)=(4.8-0.7+0.8(stat)±0.3(sys))×10-6 and B(B+→ηK+)=(2.1±0.6(stat)±0.2(sys))×10-6. Their corresponding CP violating asymmetries are measured to be 0.07±0.15(stat) ±0.03(sys) for ηπ± and -0.49±0.31(stat)±0. 07(sys) for ηK±. No significant signals are found for neutral B→ηh decays. We report the following upper limits on branching fractions at the 90% confidence level: B(B0→ηK0)<2.0×10-6, B(B0→ηπ0)<2.5×10-6 and B(B0→ηη)<2. 0×10-6.

Original languageEnglish
Article number091106
Pages (from-to)1-6
Number of pages6
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume71
Issue number9
DOIs
Publication statusPublished - 2005 May 1

Fingerprint

asymmetry
decay
confidence
mesons
detectors

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Chang, P. ; Abe, K. ; Abe, K. ; Aihara, H. ; Akatsu, M. ; Asano, Y. ; Aushev, T. ; Bakich, A. M. ; Balagura, V. ; Ban, Y. ; Banerjee, S. ; Bedny, I. ; Bitenc, U. ; Bizjak, I. ; Blyth, S. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Brodzicka, J. ; Browder, T. E. ; Chao, Y. ; Chen, A. ; Chen, K. F. ; Cheon, B. G. ; Chistov, R. ; Choi, S. K. ; Choi, Y. ; Chuvikov, A. ; Cole, S. ; Dalseno, J. ; Danilov, M. ; Dash, M. ; Dragic, J. ; Drutskoy, A. ; Eidelman, S. ; Eiges, V. ; Fratina, S. ; Gabyshev, N. ; Garmash, A. ; Gershon, T. ; Gokhroo, G. ; Guo, R. ; Haba, J. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Hokuue, T. ; Hoshi, Y. ; Hou, S. ; Hou, W. S. ; Hsiung, Y. B. ; Huang, H. C. ; Iijima, T. ; Imoto, A. ; Inami, K. ; Ishikawa, A. ; Itoh, R. ; Iwasaki, M. ; Iwasaki, Y. ; Kang, J. H. ; Kang, J. S. ; Kapusta, P. ; Katayama, N. ; Kawai, H. ; Kawasaki, T. ; Khan, H. R. ; Kichimi, H. ; Kim, H. J. ; Kim, J. H. ; Kim, S. K. ; Kim, S. M. ; Koppenburg, P. ; Korpar, S. ; Krian, P. ; Krokovny, P. ; Kulasiri, R. ; Kuo, C. C. ; Kwon, Y. J. ; Lee, S. E. ; Lee, S. H. ; Lesiak, T. ; Li, J. ; Lin, S. W. ; Liventsev, D. ; Majumder, G. ; Mandl, F. ; Matsumoto, T. ; Mitaroff, W. ; Miyabayashi, K. ; Miyake, H. ; Miyata, H. ; Mizuk, R. ; Mohapatra, D. ; Mori, T. ; Nagamine, T. ; Nagasaka, Y. ; Nakano, E. ; Nakao, M. ; Nishida, S. ; Ogawa, S. ; Ohshima, T. ; Okabe, T. ; Okuno, S. ; Olsen, S. L. ; Ostrowicz, W. ; Ozaki, H. ; Pakhlov, P. ; Park, C. W. ; Park, H. ; Parslow, N. ; Pestotnik, R. ; Piilonen, L. E. ; Rozanska, M. ; Sagawa, H. ; Sakai, Y. ; Schietinger, T. ; Schneider, O. ; Schönmeier, P. ; Schümann, J. ; Schwartz, A. J. ; Senyo, K. ; Shibuya, H. ; Singh, J. B. ; Somov, A. ; Soni, N. ; Stamen, R. ; Stanič, S. ; Starič, M. ; Sumisawa, K. ; Sumiyoshi, T. ; Tajima, O. ; Takasaki, F. ; Tamura, N. ; Tanaka, M. ; Teramoto, Y. ; Tian, X. C. ; Uehara, S. ; Uglov, T. ; Ueno, K. ; Uno, S. ; Ushiroda, Y. ; Varner, G. ; Varvell, K. E. ; Villa, S. ; Wang, C. C. ; Wang, C. H. ; Wang, M. Z. ; Yamaguchi, A. ; Yamamoto, H. ; Yamashita, Y. ; Yamauchi, M. ; Yang, Heyoung ; Ying, J. ; Zhang, J. ; Zhang, L. M. ; Zhang, Z. P. ; Zhilich, V. ; Ontar, D. / Measurements of branching fractions and CP asymmetries in B→ηh decays. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2005 ; Vol. 71, No. 9. pp. 1-6.
@article{e61f7316734f414ea0e7307fa74f4a7c,
title = "Measurements of branching fractions and CP asymmetries in B→ηh decays",
abstract = "We report measurements of B to pseudoscalar-pseudoscalar decays with at least one η meson in the final state using 140fb-1 of data collected by the Belle detector at KEKB e+e- collider. We observe the decay B+→ηπ+ and find evidence of B+→ηK+; the measured branching fractions are B(B+→ηπ+)=(4.8-0.7+0.8(stat)±0.3(sys))×10-6 and B(B+→ηK+)=(2.1±0.6(stat)±0.2(sys))×10-6. Their corresponding CP violating asymmetries are measured to be 0.07±0.15(stat) ±0.03(sys) for ηπ± and -0.49±0.31(stat)±0. 07(sys) for ηK±. No significant signals are found for neutral B→ηh decays. We report the following upper limits on branching fractions at the 90{\%} confidence level: B(B0→ηK0)<2.0×10-6, B(B0→ηπ0)<2.5×10-6 and B(B0→ηη)<2. 0×10-6.",
author = "P. Chang and K. Abe and K. Abe and H. Aihara and M. Akatsu and Y. Asano and T. Aushev and Bakich, {A. M.} and V. Balagura and Y. Ban and S. Banerjee and I. Bedny and U. Bitenc and I. Bizjak and S. Blyth and A. Bondar and A. Bozek and M. Bračko and J. Brodzicka and Browder, {T. E.} and Y. Chao and A. Chen and Chen, {K. F.} and Cheon, {B. G.} and R. Chistov and Choi, {S. K.} and Y. Choi and A. Chuvikov and S. Cole and J. Dalseno and M. Danilov and M. Dash and J. Dragic and A. Drutskoy and S. Eidelman and V. Eiges and S. Fratina and N. Gabyshev and A. Garmash and T. Gershon and G. Gokhroo and R. Guo and J. Haba and K. Hayasaka and H. Hayashii and M. Hazumi and T. Hokuue and Y. Hoshi and S. Hou and Hou, {W. S.} and Hsiung, {Y. B.} and Huang, {H. C.} and T. Iijima and A. Imoto and K. Inami and A. Ishikawa and R. Itoh and M. Iwasaki and Y. Iwasaki and Kang, {J. H.} and Kang, {J. S.} and P. Kapusta and N. Katayama and H. Kawai and T. Kawasaki and Khan, {H. R.} and H. Kichimi and Kim, {H. J.} and Kim, {J. H.} and Kim, {S. K.} and Kim, {S. M.} and P. Koppenburg and S. Korpar and P. Krian and P. Krokovny and R. Kulasiri and Kuo, {C. C.} and Kwon, {Y. J.} and Lee, {S. E.} and Lee, {S. H.} and T. Lesiak and J. Li and Lin, {S. W.} and D. Liventsev and G. Majumder and F. Mandl and T. Matsumoto and W. Mitaroff and K. Miyabayashi and H. Miyake and H. Miyata and R. Mizuk and D. Mohapatra and T. Mori and T. Nagamine and Y. Nagasaka and E. Nakano and M. Nakao and S. Nishida and S. Ogawa and T. Ohshima and T. Okabe and S. Okuno and Olsen, {S. L.} and W. Ostrowicz and H. Ozaki and P. Pakhlov and Park, {C. W.} and H. Park and N. Parslow and R. Pestotnik and Piilonen, {L. E.} and M. Rozanska and H. Sagawa and Y. Sakai and T. Schietinger and O. Schneider and P. Sch{\"o}nmeier and J. Sch{\"u}mann and Schwartz, {A. J.} and K. Senyo and H. Shibuya and Singh, {J. B.} and A. Somov and N. Soni and R. Stamen and S. Stanič and M. Starič and K. Sumisawa and T. Sumiyoshi and O. Tajima and F. Takasaki and N. Tamura and M. Tanaka and Y. Teramoto and Tian, {X. C.} and S. Uehara and T. Uglov and K. Ueno and S. Uno and Y. Ushiroda and G. Varner and Varvell, {K. E.} and S. Villa and Wang, {C. C.} and Wang, {C. H.} and Wang, {M. Z.} and A. Yamaguchi and H. Yamamoto and Y. Yamashita and M. Yamauchi and Heyoung Yang and J. Ying and J. Zhang and Zhang, {L. M.} and Zhang, {Z. P.} and V. Zhilich and D. Ontar",
year = "2005",
month = "5",
day = "1",
doi = "10.1103/PhysRevD.71.091106",
language = "English",
volume = "71",
pages = "1--6",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "1550-7998",
number = "9",

}

Chang, P, Abe, K, Abe, K, Aihara, H, Akatsu, M, Asano, Y, Aushev, T, Bakich, AM, Balagura, V, Ban, Y, Banerjee, S, Bedny, I, Bitenc, U, Bizjak, I, Blyth, S, Bondar, A, Bozek, A, Bračko, M, Brodzicka, J, Browder, TE, Chao, Y, Chen, A, Chen, KF, Cheon, BG, Chistov, R, Choi, SK, Choi, Y, Chuvikov, A, Cole, S, Dalseno, J, Danilov, M, Dash, M, Dragic, J, Drutskoy, A, Eidelman, S, Eiges, V, Fratina, S, Gabyshev, N, Garmash, A, Gershon, T, Gokhroo, G, Guo, R, Haba, J, Hayasaka, K, Hayashii, H, Hazumi, M, Hokuue, T, Hoshi, Y, Hou, S, Hou, WS, Hsiung, YB, Huang, HC, Iijima, T, Imoto, A, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, M, Iwasaki, Y, Kang, JH, Kang, JS, Kapusta, P, Katayama, N, Kawai, H, Kawasaki, T, Khan, HR, Kichimi, H, Kim, HJ, Kim, JH, Kim, SK, Kim, SM, Koppenburg, P, Korpar, S, Krian, P, Krokovny, P, Kulasiri, R, Kuo, CC, Kwon, YJ, Lee, SE, Lee, SH, Lesiak, T, Li, J, Lin, SW, Liventsev, D, Majumder, G, Mandl, F, Matsumoto, T, Mitaroff, W, Miyabayashi, K, Miyake, H, Miyata, H, Mizuk, R, Mohapatra, D, Mori, T, Nagamine, T, Nagasaka, Y, Nakano, E, Nakao, M, Nishida, S, Ogawa, S, Ohshima, T, Okabe, T, Okuno, S, Olsen, SL, Ostrowicz, W, Ozaki, H, Pakhlov, P, Park, CW, Park, H, Parslow, N, Pestotnik, R, Piilonen, LE, Rozanska, M, Sagawa, H, Sakai, Y, Schietinger, T, Schneider, O, Schönmeier, P, Schümann, J, Schwartz, AJ, Senyo, K, Shibuya, H, Singh, JB, Somov, A, Soni, N, Stamen, R, Stanič, S, Starič, M, Sumisawa, K, Sumiyoshi, T, Tajima, O, Takasaki, F, Tamura, N, Tanaka, M, Teramoto, Y, Tian, XC, Uehara, S, Uglov, T, Ueno, K, Uno, S, Ushiroda, Y, Varner, G, Varvell, KE, Villa, S, Wang, CC, Wang, CH, Wang, MZ, Yamaguchi, A, Yamamoto, H, Yamashita, Y, Yamauchi, M, Yang, H, Ying, J, Zhang, J, Zhang, LM, Zhang, ZP, Zhilich, V & Ontar, D 2005, 'Measurements of branching fractions and CP asymmetries in B→ηh decays', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 71, no. 9, 091106, pp. 1-6. https://doi.org/10.1103/PhysRevD.71.091106

Measurements of branching fractions and CP asymmetries in B→ηh decays. / Chang, P.; Abe, K.; Abe, K.; Aihara, H.; Akatsu, M.; Asano, Y.; Aushev, T.; Bakich, A. M.; Balagura, V.; Ban, Y.; Banerjee, S.; Bedny, I.; Bitenc, U.; Bizjak, I.; Blyth, S.; Bondar, A.; Bozek, A.; Bračko, M.; Brodzicka, J.; Browder, T. E.; Chao, Y.; Chen, A.; Chen, K. F.; Cheon, B. G.; Chistov, R.; Choi, S. K.; Choi, Y.; Chuvikov, A.; Cole, S.; Dalseno, J.; Danilov, M.; Dash, M.; Dragic, J.; Drutskoy, A.; Eidelman, S.; Eiges, V.; Fratina, S.; Gabyshev, N.; Garmash, A.; Gershon, T.; Gokhroo, G.; Guo, R.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W. S.; Hsiung, Y. B.; Huang, H. C.; Iijima, T.; Imoto, A.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kang, J. H.; Kang, J. S.; Kapusta, P.; Katayama, N.; Kawai, H.; Kawasaki, T.; Khan, H. R.; Kichimi, H.; Kim, H. J.; Kim, J. H.; Kim, S. K.; Kim, S. M.; Koppenburg, P.; Korpar, S.; Krian, P.; Krokovny, P.; Kulasiri, R.; Kuo, C. C.; Kwon, Y. J.; Lee, S. E.; Lee, S. H.; Lesiak, T.; Li, J.; Lin, S. W.; Liventsev, D.; Majumder, G.; Mandl, F.; Matsumoto, T.; Mitaroff, W.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Mizuk, R.; Mohapatra, D.; Mori, T.; Nagamine, T.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Nishida, S.; Ogawa, S.; Ohshima, T.; Okabe, T.; Okuno, S.; Olsen, S. L.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Park, C. W.; Park, H.; Parslow, N.; Pestotnik, R.; Piilonen, L. E.; Rozanska, M.; Sagawa, H.; Sakai, Y.; Schietinger, T.; Schneider, O.; Schönmeier, P.; Schümann, J.; Schwartz, A. J.; Senyo, K.; Shibuya, H.; Singh, J. B.; Somov, A.; Soni, N.; Stamen, R.; Stanič, S.; Starič, M.; Sumisawa, K.; Sumiyoshi, T.; Tajima, O.; Takasaki, F.; Tamura, N.; Tanaka, M.; Teramoto, Y.; Tian, X. C.; Uehara, S.; Uglov, T.; Ueno, K.; Uno, S.; Ushiroda, Y.; Varner, G.; Varvell, K. E.; Villa, S.; Wang, C. C.; Wang, C. H.; Wang, M. Z.; Yamaguchi, A.; Yamamoto, H.; Yamashita, Y.; Yamauchi, M.; Yang, Heyoung; Ying, J.; Zhang, J.; Zhang, L. M.; Zhang, Z. P.; Zhilich, V.; Ontar, D.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 71, No. 9, 091106, 01.05.2005, p. 1-6.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measurements of branching fractions and CP asymmetries in B→ηh decays

AU - Chang, P.

AU - Abe, K.

AU - Abe, K.

AU - Aihara, H.

AU - Akatsu, M.

AU - Asano, Y.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Ban, Y.

AU - Banerjee, S.

AU - Bedny, I.

AU - Bitenc, U.

AU - Bizjak, I.

AU - Blyth, S.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Brodzicka, J.

AU - Browder, T. E.

AU - Chao, Y.

AU - Chen, A.

AU - Chen, K. F.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, S. K.

AU - Choi, Y.

AU - Chuvikov, A.

AU - Cole, S.

AU - Dalseno, J.

AU - Danilov, M.

AU - Dash, M.

AU - Dragic, J.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Eiges, V.

AU - Fratina, S.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gershon, T.

AU - Gokhroo, G.

AU - Guo, R.

AU - Haba, J.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Hokuue, T.

AU - Hoshi, Y.

AU - Hou, S.

AU - Hou, W. S.

AU - Hsiung, Y. B.

AU - Huang, H. C.

AU - Iijima, T.

AU - Imoto, A.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Kang, J. H.

AU - Kang, J. S.

AU - Kapusta, P.

AU - Katayama, N.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Khan, H. R.

AU - Kichimi, H.

AU - Kim, H. J.

AU - Kim, J. H.

AU - Kim, S. K.

AU - Kim, S. M.

AU - Koppenburg, P.

AU - Korpar, S.

AU - Krian, P.

AU - Krokovny, P.

AU - Kulasiri, R.

AU - Kuo, C. C.

AU - Kwon, Y. J.

AU - Lee, S. E.

AU - Lee, S. H.

AU - Lesiak, T.

AU - Li, J.

AU - Lin, S. W.

AU - Liventsev, D.

AU - Majumder, G.

AU - Mandl, F.

AU - Matsumoto, T.

AU - Mitaroff, W.

AU - Miyabayashi, K.

AU - Miyake, H.

AU - Miyata, H.

AU - Mizuk, R.

AU - Mohapatra, D.

AU - Mori, T.

AU - Nagamine, T.

AU - Nagasaka, Y.

AU - Nakano, E.

AU - Nakao, M.

AU - Nishida, S.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okabe, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Ostrowicz, W.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Park, C. W.

AU - Park, H.

AU - Parslow, N.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Rozanska, M.

AU - Sagawa, H.

AU - Sakai, Y.

AU - Schietinger, T.

AU - Schneider, O.

AU - Schönmeier, P.

AU - Schümann, J.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Shibuya, H.

AU - Singh, J. B.

AU - Somov, A.

AU - Soni, N.

AU - Stamen, R.

AU - Stanič, S.

AU - Starič, M.

AU - Sumisawa, K.

AU - Sumiyoshi, T.

AU - Tajima, O.

AU - Takasaki, F.

AU - Tamura, N.

AU - Tanaka, M.

AU - Teramoto, Y.

AU - Tian, X. C.

AU - Uehara, S.

AU - Uglov, T.

AU - Ueno, K.

AU - Uno, S.

AU - Ushiroda, Y.

AU - Varner, G.

AU - Varvell, K. E.

AU - Villa, S.

AU - Wang, C. C.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Yamaguchi, A.

AU - Yamamoto, H.

AU - Yamashita, Y.

AU - Yamauchi, M.

AU - Yang, Heyoung

AU - Ying, J.

AU - Zhang, J.

AU - Zhang, L. M.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Ontar, D.

PY - 2005/5/1

Y1 - 2005/5/1

N2 - We report measurements of B to pseudoscalar-pseudoscalar decays with at least one η meson in the final state using 140fb-1 of data collected by the Belle detector at KEKB e+e- collider. We observe the decay B+→ηπ+ and find evidence of B+→ηK+; the measured branching fractions are B(B+→ηπ+)=(4.8-0.7+0.8(stat)±0.3(sys))×10-6 and B(B+→ηK+)=(2.1±0.6(stat)±0.2(sys))×10-6. Their corresponding CP violating asymmetries are measured to be 0.07±0.15(stat) ±0.03(sys) for ηπ± and -0.49±0.31(stat)±0. 07(sys) for ηK±. No significant signals are found for neutral B→ηh decays. We report the following upper limits on branching fractions at the 90% confidence level: B(B0→ηK0)<2.0×10-6, B(B0→ηπ0)<2.5×10-6 and B(B0→ηη)<2. 0×10-6.

AB - We report measurements of B to pseudoscalar-pseudoscalar decays with at least one η meson in the final state using 140fb-1 of data collected by the Belle detector at KEKB e+e- collider. We observe the decay B+→ηπ+ and find evidence of B+→ηK+; the measured branching fractions are B(B+→ηπ+)=(4.8-0.7+0.8(stat)±0.3(sys))×10-6 and B(B+→ηK+)=(2.1±0.6(stat)±0.2(sys))×10-6. Their corresponding CP violating asymmetries are measured to be 0.07±0.15(stat) ±0.03(sys) for ηπ± and -0.49±0.31(stat)±0. 07(sys) for ηK±. No significant signals are found for neutral B→ηh decays. We report the following upper limits on branching fractions at the 90% confidence level: B(B0→ηK0)<2.0×10-6, B(B0→ηπ0)<2.5×10-6 and B(B0→ηη)<2. 0×10-6.

UR - http://www.scopus.com/inward/record.url?scp=27144465493&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27144465493&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.71.091106

DO - 10.1103/PhysRevD.71.091106

M3 - Article

AN - SCOPUS:27144465493

VL - 71

SP - 1

EP - 6

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

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

SN - 1550-7998

IS - 9

M1 - 091106

ER -