Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2

T. Julius, M. E. Sevior, G. B. Mohanty, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, M. Barrett, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal & 166 others T. Bloomfield, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, M. C. Chang, Y. Chao, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Doležal, D. Dossett, Z. Drásal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, Y. Jin, D. Joffe, K. K. Joo, J. Kahn, G. Karyan, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, P. Krokovny, J. F. Krohn, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, C. S. Park, H. Park, L. Pesántez, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, H. Sahoo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, V. Shebalin, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, T. Sumiyoshi, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, K. E. Varvell, A. Vossen, E. Waheed, C. H. Wang, M. Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Widmann, K. M. Williams, Eunil Won, Y. Yamashita, H. Ye, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We measure the branching fraction and CP violation asymmetry in the decay B0 → π0π0, using a data sample of 752 × 106 BB¯ pairs collected at the ϒð4SÞ resonance with the Belle detector at the KEKB eþe collider. The obtained branching fraction and direct CP asymmetry are BðB → π0π0Þ ¼ ½1.31 0.19ðstatÞ 0.19ðsystÞ × 10−6 and ACP ¼ þ0.14 0.36ðstatÞ 0.10ðsystÞ, respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle’s earlier measurements of B0 → πþπ and B → ππ0 to exclude the CP-violating parameter ϕ2 from the range 15.5° < ϕ2 < 75.0° at 95% confidence level.

Original languageEnglish
Article number032007
JournalPhysical Review D
Volume96
Issue number11
DOIs
Publication statusPublished - 2017 Dec 1

Fingerprint

asymmetry
decay
CP violation
confidence
standard deviation
detectors

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Julius, T., Sevior, M. E., Mohanty, G. B., Adachi, I., Aihara, H., Al Said, S., ... Zupanc, A. (2017). Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2 Physical Review D, 96(11), [032007]. https://doi.org/10.1103/PhysRevD.96.032007

Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2 . / Julius, T.; Sevior, M. E.; Mohanty, G. B.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bakich, A. M.; Bansal, V.; Barberio, E.; Barrett, M.; Berger, M.; Bhardwaj, V.; Bhuyan, B.; Biswal, J.; Bloomfield, T.; Bobrov, A.; Bondar, A.; Bonvicini, G.; Bozek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chang, M. C.; Chao, Y.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, Y.; Cinabro, D.; Dash, N.; Di Carlo, S.; Doležal, Z.; Dossett, D.; Drásal, Z.; Dutta, D.; Eidelman, S.; Farhat, H.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gillard, R.; Goldenzweig, P.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hou, W. S.; Hsu, C. L.; Iijima, T.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jacobs, W. W.; Jaegle, I.; Jin, Y.; Joffe, D.; Joo, K. K.; Kahn, J.; Karyan, G.; Katrenko, P.; Kawasaki, T.; Kiesling, C.; Kim, D. Y.; Kim, H. J.; Kim, J. B.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kim, Y. J.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Krokovny, P.; Krohn, J. F.; Kuhr, T.; Kulasiri, R.; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Lee, I. S.; Li, C. H.; Li, L.; Li, Y.; Li Gioi, L.; Libby, J.; Liventsev, D.; Luo, T.; MacNaughton, J.; Masuda, M.; Matsuda, T.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Moon, H. K.; Mori, T.; Mussa, R.; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Natkaniec, Z.; Nayak, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Ono, H.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Pardi, S.; Park, C. S.; Park, H.; Pesántez, L.; Pestotnik, R.; Piilonen, L. E.; Pulvermacher, C.; Ritter, M.; Sahoo, H.; Sakai, Y.; Salehi, M.; Sandilya, S.; Santelj, L.; Sanuki, T.; Sato, Y.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Shebalin, V.; Shibata, T. A.; Shiu, J. G.; Shwartz, B.; Sokolov, A.; Solovieva, E.; Starič, M.; Sumiyoshi, T.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Van Hulse, C.; Varner, G.; Varvell, K. E.; Vossen, A.; Waheed, E.; Wang, C. H.; Wang, M. Z.; Wang, P.; Watanabe, M.; Watanabe, Y.; Widmann, E.; Williams, K. M.; Won, Eunil; Yamashita, Y.; Ye, H.; Yuan, C. Z.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

In: Physical Review D, Vol. 96, No. 11, 032007, 01.12.2017.

Research output: Contribution to journalArticle

Julius, T, Sevior, ME, Mohanty, GB, Adachi, I, Aihara, H, Al Said, S, Asner, DM, Aulchenko, V, Aushev, T, Ayad, R, Babu, V, Badhrees, I, Bakich, AM, Bansal, V, Barberio, E, Barrett, M, Berger, M, Bhardwaj, V, Bhuyan, B, Biswal, J, Bloomfield, T, Bobrov, A, Bondar, A, Bonvicini, G, Bozek, A, Bračko, M, Browder, TE, Červenkov, D, Chang, MC, Chao, Y, Chekelian, V, Chen, A, Cheon, BG, Chilikin, K, Cho, K, Choi, Y, Cinabro, D, Dash, N, Di Carlo, S, Doležal, Z, Dossett, D, Drásal, Z, Dutta, D, Eidelman, S, Farhat, H, Fast, JE, Ferber, T, Fulsom, BG, Gaur, V, Gabyshev, N, Garmash, A, Gillard, R, Goldenzweig, P, Haba, J, Hara, T, Hayasaka, K, Hayashii, H, Hou, WS, Hsu, CL, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, Y, Jacobs, WW, Jaegle, I, Jin, Y, Joffe, D, Joo, KK, Kahn, J, Karyan, G, Katrenko, P, Kawasaki, T, Kiesling, C, Kim, DY, Kim, HJ, Kim, JB, Kim, KT, Kim, MJ, Kim, SH, Kim, YJ, Kinoshita, K, Kodyš, P, Korpar, S, Kotchetkov, D, Križan, P, Krokovny, P, Krohn, JF, Kuhr, T, Kulasiri, R, Kuzmin, A, Kwon, YJ, Lange, JS, Lee, IS, Li, CH, Li, L, Li, Y, Li Gioi, L, Libby, J, Liventsev, D, Luo, T, MacNaughton, J, Masuda, M, Matsuda, T, Merola, M, Miyabayashi, K, Miyata, H, Mizuk, R, Moon, HK, Mori, T, Mussa, R, Nakano, E, Nakao, M, Nanut, T, Nath, KJ, Natkaniec, Z, Nayak, M, Nisar, NK, Nishida, S, Ogawa, S, Ono, H, Pakhlov, P, Pakhlova, G, Pal, B, Pardi, S, Park, CS, Park, H, Pesántez, L, Pestotnik, R, Piilonen, LE, Pulvermacher, C, Ritter, M, Sahoo, H, Sakai, Y, Salehi, M, Sandilya, S, Santelj, L, Sanuki, T, Sato, Y, Savinov, V, Schneider, O, Schnell, G, Schwanda, C, Schwartz, AJ, Seino, Y, Senyo, K, Shebalin, V, Shibata, TA, Shiu, JG, Shwartz, B, Sokolov, A, Solovieva, E, Starič, M, Sumiyoshi, T, Tamponi, U, Tanida, K, Tenchini, F, Trabelsi, K, Uchida, M, Uehara, S, Uglov, T, Unno, Y, Uno, S, Urquijo, P, Usov, Y, Van Hulse, C, Varner, G, Varvell, KE, Vossen, A, Waheed, E, Wang, CH, Wang, MZ, Wang, P, Watanabe, M, Watanabe, Y, Widmann, E, Williams, KM, Won, E, Yamashita, Y, Ye, H, Yuan, CZ, Yusa, Y, Zhang, ZP, Zhilich, V, Zhulanov, V & Zupanc, A 2017, 'Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2 ', Physical Review D, vol. 96, no. 11, 032007. https://doi.org/10.1103/PhysRevD.96.032007
Julius, T. ; Sevior, M. E. ; Mohanty, G. B. ; Adachi, I. ; Aihara, H. ; Al Said, S. ; Asner, D. M. ; Aulchenko, V. ; Aushev, T. ; Ayad, R. ; Babu, V. ; Badhrees, I. ; Bakich, A. M. ; Bansal, V. ; Barberio, E. ; Barrett, M. ; Berger, M. ; Bhardwaj, V. ; Bhuyan, B. ; Biswal, J. ; Bloomfield, T. ; Bobrov, A. ; Bondar, A. ; Bonvicini, G. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Červenkov, D. ; Chang, M. C. ; Chao, Y. ; Chekelian, V. ; Chen, A. ; Cheon, B. G. ; Chilikin, K. ; Cho, K. ; Choi, Y. ; Cinabro, D. ; Dash, N. ; Di Carlo, S. ; Doležal, Z. ; Dossett, D. ; Drásal, Z. ; Dutta, D. ; Eidelman, S. ; Farhat, H. ; Fast, J. E. ; Ferber, T. ; Fulsom, B. G. ; Gaur, V. ; Gabyshev, N. ; Garmash, A. ; Gillard, R. ; Goldenzweig, P. ; Haba, J. ; Hara, T. ; Hayasaka, K. ; Hayashii, H. ; Hou, W. S. ; Hsu, C. L. ; Iijima, T. ; Inami, K. ; Ishikawa, A. ; Itoh, R. ; Iwasaki, Y. ; Jacobs, W. W. ; Jaegle, I. ; Jin, Y. ; Joffe, D. ; Joo, K. K. ; Kahn, J. ; Karyan, G. ; Katrenko, P. ; Kawasaki, T. ; Kiesling, C. ; Kim, D. Y. ; Kim, H. J. ; Kim, J. B. ; Kim, K. T. ; Kim, M. J. ; Kim, S. H. ; Kim, Y. J. ; Kinoshita, K. ; Kodyš, P. ; Korpar, S. ; Kotchetkov, D. ; Križan, P. ; Krokovny, P. ; Krohn, J. F. ; Kuhr, T. ; Kulasiri, R. ; Kuzmin, A. ; Kwon, Y. J. ; Lange, J. S. ; Lee, I. S. ; Li, C. H. ; Li, L. ; Li, Y. ; Li Gioi, L. ; Libby, J. ; Liventsev, D. ; Luo, T. ; MacNaughton, J. ; Masuda, M. ; Matsuda, T. ; Merola, M. ; Miyabayashi, K. ; Miyata, H. ; Mizuk, R. ; Moon, H. K. ; Mori, T. ; Mussa, R. ; Nakano, E. ; Nakao, M. ; Nanut, T. ; Nath, K. J. ; Natkaniec, Z. ; Nayak, M. ; Nisar, N. K. ; Nishida, S. ; Ogawa, S. ; Ono, H. ; Pakhlov, P. ; Pakhlova, G. ; Pal, B. ; Pardi, S. ; Park, C. S. ; Park, H. ; Pesántez, L. ; Pestotnik, R. ; Piilonen, L. E. ; Pulvermacher, C. ; Ritter, M. ; Sahoo, H. ; Sakai, Y. ; Salehi, M. ; Sandilya, S. ; Santelj, L. ; Sanuki, T. ; Sato, Y. ; Savinov, V. ; Schneider, O. ; Schnell, G. ; Schwanda, C. ; Schwartz, A. J. ; Seino, Y. ; Senyo, K. ; Shebalin, V. ; Shibata, T. A. ; Shiu, J. G. ; Shwartz, B. ; Sokolov, A. ; Solovieva, E. ; Starič, M. ; Sumiyoshi, T. ; Tamponi, U. ; Tanida, K. ; Tenchini, F. ; Trabelsi, K. ; Uchida, M. ; Uehara, S. ; Uglov, T. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Usov, Y. ; Van Hulse, C. ; Varner, G. ; Varvell, K. E. ; Vossen, A. ; Waheed, E. ; Wang, C. H. ; Wang, M. Z. ; Wang, P. ; Watanabe, M. ; Watanabe, Y. ; Widmann, E. ; Williams, K. M. ; Won, Eunil ; Yamashita, Y. ; Ye, H. ; Yuan, C. Z. ; Yusa, Y. ; Zhang, Z. P. ; Zhilich, V. ; Zhulanov, V. ; Zupanc, A. / Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2 In: Physical Review D. 2017 ; Vol. 96, No. 11.
@article{a8db787df6c34fbaa0338cdb329b426b,
title = "Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2",
abstract = "We measure the branching fraction and CP violation asymmetry in the decay B0 → π0π0, using a data sample of 752 × 106 BB¯ pairs collected at the ϒ{\dh}4S{\TH} resonance with the Belle detector at the KEKB e{\th}e− collider. The obtained branching fraction and direct CP asymmetry are B{\dh}B → π0π0{\TH} ¼ ½1.31 0.19{\dh}stat{\TH} 0.19{\dh}syst{\TH} × 10−6 and ACP ¼ {\th}0.14 0.36{\dh}stat{\TH} 0.10{\dh}syst{\TH}, respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle’s earlier measurements of B0 → π{\th}π− and B → ππ0 to exclude the CP-violating parameter ϕ2 from the range 15.5° < ϕ2 < 75.0° at 95{\%} confidence level.",
author = "T. Julius and Sevior, {M. E.} and Mohanty, {G. B.} and I. Adachi and H. Aihara and {Al Said}, S. and Asner, {D. M.} and V. Aulchenko and T. Aushev and R. Ayad and V. Babu and I. Badhrees and Bakich, {A. M.} and V. Bansal and E. Barberio and M. Barrett and M. Berger and V. Bhardwaj and B. Bhuyan and J. Biswal and T. Bloomfield and A. Bobrov and A. Bondar and G. Bonvicini and A. Bozek and M. Bračko and Browder, {T. E.} and D. Červenkov and Chang, {M. C.} and Y. Chao and V. Chekelian and A. Chen and Cheon, {B. G.} and K. Chilikin and K. Cho and Y. Choi and D. Cinabro and N. Dash and {Di Carlo}, S. and Z. Doležal and D. Dossett and Z. Dr{\'a}sal and D. Dutta and S. Eidelman and H. Farhat and Fast, {J. E.} and T. Ferber and Fulsom, {B. G.} and V. Gaur and N. Gabyshev and A. Garmash and R. Gillard and P. Goldenzweig and J. Haba and T. Hara and K. Hayasaka and H. Hayashii and Hou, {W. S.} and Hsu, {C. L.} and T. Iijima and K. Inami and A. Ishikawa and R. Itoh and Y. Iwasaki and Jacobs, {W. W.} and I. Jaegle and Y. Jin and D. Joffe and Joo, {K. K.} and J. Kahn and G. Karyan and P. Katrenko and T. Kawasaki and C. Kiesling and Kim, {D. Y.} and Kim, {H. J.} and Kim, {J. B.} and Kim, {K. T.} and Kim, {M. J.} and Kim, {S. H.} and Kim, {Y. J.} and K. Kinoshita and P. Kodyš and S. Korpar and D. Kotchetkov and P. Križan and P. Krokovny and Krohn, {J. F.} and T. Kuhr and R. Kulasiri and A. Kuzmin and Kwon, {Y. J.} and Lange, {J. S.} and Lee, {I. S.} and Li, {C. H.} and L. Li and Y. Li and {Li Gioi}, L. and J. Libby and D. Liventsev and T. Luo and J. MacNaughton and M. Masuda and T. Matsuda and M. Merola and K. Miyabayashi and H. Miyata and R. Mizuk and Moon, {H. K.} and T. Mori and R. Mussa and E. Nakano and M. Nakao and T. Nanut and Nath, {K. J.} and Z. Natkaniec and M. Nayak and Nisar, {N. K.} and S. Nishida and S. Ogawa and H. Ono and P. Pakhlov and G. Pakhlova and B. Pal and S. Pardi and Park, {C. S.} and H. Park and L. Pes{\'a}ntez and R. Pestotnik and Piilonen, {L. E.} and C. Pulvermacher and M. Ritter and H. Sahoo and Y. Sakai and M. Salehi and S. Sandilya and L. Santelj and T. Sanuki and Y. Sato and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and Schwartz, {A. J.} and Y. Seino and K. Senyo and V. Shebalin and Shibata, {T. A.} and Shiu, {J. G.} and B. Shwartz and A. Sokolov and E. Solovieva and M. Starič and T. Sumiyoshi and U. Tamponi and K. Tanida and F. Tenchini and K. Trabelsi and M. Uchida and S. Uehara and T. Uglov and Y. Unno and S. Uno and P. Urquijo and Y. Usov and {Van Hulse}, C. and G. Varner and Varvell, {K. E.} and A. Vossen and E. Waheed and Wang, {C. H.} and Wang, {M. Z.} and P. Wang and M. Watanabe and Y. Watanabe and E. Widmann and Williams, {K. M.} and Eunil Won and Y. Yamashita and H. Ye and Yuan, {C. Z.} and Y. Yusa and Zhang, {Z. P.} and V. Zhilich and V. Zhulanov and A. Zupanc",
year = "2017",
month = "12",
day = "1",
doi = "10.1103/PhysRevD.96.032007",
language = "English",
volume = "96",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "11",

}

TY - JOUR

T1 - Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2

AU - Julius, T.

AU - Sevior, M. E.

AU - Mohanty, G. B.

AU - Adachi, I.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Badhrees, I.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Barberio, E.

AU - Barrett, M.

AU - Berger, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Biswal, J.

AU - Bloomfield, T.

AU - Bobrov, A.

AU - Bondar, A.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chao, Y.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Dash, N.

AU - Di Carlo, S.

AU - Doležal, Z.

AU - Dossett, D.

AU - Drásal, Z.

AU - Dutta, D.

AU - Eidelman, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gillard, R.

AU - Goldenzweig, P.

AU - Haba, J.

AU - Hara, T.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hou, W. S.

AU - Hsu, C. L.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, Y.

AU - Jacobs, W. W.

AU - Jaegle, I.

AU - Jin, Y.

AU - Joffe, D.

AU - Joo, K. K.

AU - Kahn, J.

AU - Karyan, G.

AU - Katrenko, P.

AU - Kawasaki, T.

AU - Kiesling, C.

AU - Kim, D. Y.

AU - Kim, H. J.

AU - Kim, J. B.

AU - Kim, K. T.

AU - Kim, M. J.

AU - Kim, S. H.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Kodyš, P.

AU - Korpar, S.

AU - Kotchetkov, D.

AU - Križan, P.

AU - Krokovny, P.

AU - Krohn, J. F.

AU - Kuhr, T.

AU - Kulasiri, R.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lange, J. S.

AU - Lee, I. S.

AU - Li, C. H.

AU - Li, L.

AU - Li, Y.

AU - Li Gioi, L.

AU - Libby, J.

AU - Liventsev, D.

AU - Luo, T.

AU - MacNaughton, J.

AU - Masuda, M.

AU - Matsuda, T.

AU - Merola, M.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Mizuk, R.

AU - Moon, H. K.

AU - Mori, T.

AU - Mussa, R.

AU - Nakano, E.

AU - Nakao, M.

AU - Nanut, T.

AU - Nath, K. J.

AU - Natkaniec, Z.

AU - Nayak, M.

AU - Nisar, N. K.

AU - Nishida, S.

AU - Ogawa, S.

AU - Ono, H.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Pal, B.

AU - Pardi, S.

AU - Park, C. S.

AU - Park, H.

AU - Pesántez, L.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Pulvermacher, C.

AU - Ritter, M.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Salehi, M.

AU - Sandilya, S.

AU - Santelj, L.

AU - Sanuki, T.

AU - Sato, Y.

AU - Savinov, V.

AU - Schneider, O.

AU - Schnell, G.

AU - Schwanda, C.

AU - Schwartz, A. J.

AU - Seino, Y.

AU - Senyo, K.

AU - Shebalin, V.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Starič, M.

AU - Sumiyoshi, T.

AU - Tamponi, U.

AU - Tanida, K.

AU - Tenchini, F.

AU - Trabelsi, K.

AU - Uchida, M.

AU - Uehara, S.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Usov, Y.

AU - Van Hulse, C.

AU - Varner, G.

AU - Varvell, K. E.

AU - Vossen, A.

AU - Waheed, E.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Wang, P.

AU - Watanabe, M.

AU - Watanabe, Y.

AU - Widmann, E.

AU - Williams, K. M.

AU - Won, Eunil

AU - Yamashita, Y.

AU - Ye, H.

AU - Yuan, C. Z.

AU - Yusa, Y.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zhulanov, V.

AU - Zupanc, A.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - We measure the branching fraction and CP violation asymmetry in the decay B0 → π0π0, using a data sample of 752 × 106 BB¯ pairs collected at the ϒð4SÞ resonance with the Belle detector at the KEKB eþe− collider. The obtained branching fraction and direct CP asymmetry are BðB → π0π0Þ ¼ ½1.31 0.19ðstatÞ 0.19ðsystÞ × 10−6 and ACP ¼ þ0.14 0.36ðstatÞ 0.10ðsystÞ, respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle’s earlier measurements of B0 → πþπ− and B → ππ0 to exclude the CP-violating parameter ϕ2 from the range 15.5° < ϕ2 < 75.0° at 95% confidence level.

AB - We measure the branching fraction and CP violation asymmetry in the decay B0 → π0π0, using a data sample of 752 × 106 BB¯ pairs collected at the ϒð4SÞ resonance with the Belle detector at the KEKB eþe− collider. The obtained branching fraction and direct CP asymmetry are BðB → π0π0Þ ¼ ½1.31 0.19ðstatÞ 0.19ðsystÞ × 10−6 and ACP ¼ þ0.14 0.36ðstatÞ 0.10ðsystÞ, respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle’s earlier measurements of B0 → πþπ− and B → ππ0 to exclude the CP-violating parameter ϕ2 from the range 15.5° < ϕ2 < 75.0° at 95% confidence level.

UR - http://www.scopus.com/inward/record.url?scp=85048697874&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048697874&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.96.032007

DO - 10.1103/PhysRevD.96.032007

M3 - Article

VL - 96

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - 032007

ER -