First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry

Y. T. Lai; I. Adachi; H. Aihara; S. Al Said; D. M. Asner; H. Atmacan; V. Aulchenko; T. Aushev; R. Ayad; V. Babu; S. Bahinipati; P. Behera; K. Belous; J. Bennett; M. Bessner; B. Bhuyan; T. Bilka; A. Bobrov; J. Borah; A. Bozek; M. Bračko; P. Branchini; T. E. Browder; A. Budano; M. Campajola; D. Červenkov; M. C. Chang; P. Chang; V. Chekelian; A. Chen; B. G. Cheon; K. Chilikin; H. E. Cho; K. Cho; S. J. Cho; S. K. Choi; Y. Choi; D. Cinabro; S. Cunliffe; T. Czank; S. Das; G. De Nardo; G. De Pietro; R. Dhamija; F. Di Capua; J. Dingfelder; Z. DoleŽal; T. V. Dong; T. Ferber; B. G. Fulsom; R. Garg; V. Gaur; N. Gabyshev; A. Giri; P. Goldenzweig; E. Graziani; T. Gu; Y. Guan; K. Gudkova; C. Hadjivasiliou; S. Halder; O. Hartbrich; K. Hayasaka; H. Hayashii; T. Higuchi; W. S. Hou; C. L. Hsu; T. Iijima; K. Inami; A. Ishikawa; R. Itoh; M. Iwasaki; Y. Iwasaki; W. W. Jacobs; E. J. Jang; S. Jia; Y. Jin; A. B. Kaliyar; K. H. Kang; C. H. Kim; D. Y. Kim; K. H. Kim; Y. K. Kim; K. Kinoshita; P. Kodyš; T. Konno; A. Korobov; S. Korpar; E. Kovalenko; P. KriŽan; P. Krokovny; M. Kumar; R. Kumar; K. Kumara; A. Kuzmin; Y. J. Kwon; T. Lam; J. S. Lange; M. Laurenza; S. C. Lee; D. Levit; J. Li; L. K. Li; Y. B. Li; L. Li Gioi; J. Libby; K. Lieret; D. Liventsev; A. Martini; M. Masuda; D. Matvienko; F. Meier; M. Merola; F. Metzner; R. Mizuk; G. B. Mohanty; T. J. Moon; M. Mrvar; R. Mussa; M. Nakao; A. Natochii; L. Nayak; N. K. Nisar; S. Nishida; S. Ogawa; G. Pakhlova; T. Pang; S. Pardi; H. Park; S. H. Park; A. Passeri; S. Patra; S. Paul; T. K. Pedlar; R. Pestotnik; L. E. Piilonen; T. Podobnik; E. Prencipe; M. T. Prim; A. Rostomyan; N. Rout; G. Russo; D. Sahoo; Y. Sakai; S. Sandilya; A. Sangal; L. Santelj; T. Sanuki; V. Savinov; G. Schnell; J. Schueler; C. Schwanda; Y. Seino; K. Senyo; M. E. Sevior; M. Shapkin; C. Sharma; C. P. Shen; J. G. Shiu; J. B. Singh; A. Sokolov; E. Solovieva; M. Starič; Z. S. Stottler; J. F. Strube; M. Sumihama; K. Sumisawa; W. Sutcliffe; M. Takizawa; U. Tamponi; K. Tanida; F. Tenchini; K. Trabelsi; T. Uglov; Y. Unno; K. Uno; S. Uno; P. Urquijo; R. Van Tonder; G. Varner; K. E. Varvell; A. Vinokurova; A. Vossen; E. Waheed; C. H. Wang; X. L. Wang; M. Watanabe; S. Watanuki; E. Won; B. D. Yabsley; W. Yan; S. B. Yang; H. Ye; J. Yelton; Y. Zhai; Z. P. Zhang; V. Zhilich; V. Zhukova

doi:10.1103/PhysRevLett.130.181804

First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry

Y. T. Lai, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, A. Bobrov, J. Borah, A. BozekM. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, T. Czank, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, T. Higuchi, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, A. B. Kaliyar, K. H. Kang, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, D. Levit, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, A. Martini, M. Masuda, D. Matvienko, F. Meier, M. Merola, F. Metzner, R. Mizuk, G. B. Mohanty, T. J. Moon, M. Mrvar, R. Mussa, M. Nakao, A. Natochii, L. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, G. Pakhlova, T. Pang, S. Pardi, H. Park, S. H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J. G. Shiu, J. B. Singh, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, K. Sumisawa, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, T. Uglov, Y. Unno, K. Uno, S. Uno, P. Urquijo, R. Van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, E. Waheed, C. H. Wang, X. L. Wang, M. Watanabe, S. Watanuki, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova

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

Abstract

We study B+→π+π0π0 using 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10-6 and an inclusive CP asymmetry of (9.2±6.8±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+→ρ(770)+π0 branching fraction of (11.2±1.1±0.9-1.6+0.8)×10-6, where the third uncertainty is due to possible interference with B+→ρ(1450)+π0. We present the first observation of a structure around 1 GeV/c2 in the π0π0 mass spectrum, with a significance of 6.4σ, and measure a branching fraction to be (6.9±0.9±0.6)×10-6. We also report a measurement of local CP asymmetry in this structure.

Original language	English
Article number	181804
Journal	Physical Review Letters
Volume	130
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.130.181804
State	Published - 5 May 2023

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10.1103/PhysRevLett.130.181804

Cite this

Lai, Y. T., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Bobrov, A., Borah, J., ... Zhukova, V. (2023). First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry. Physical Review Letters, 130(18), Article 181804. https://doi.org/10.1103/PhysRevLett.130.181804

@article{a3c69670944f4d37acf7defefc27f255,

title = "First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry",

abstract = "We study B+→π+π0π0 using 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10-6 and an inclusive CP asymmetry of (9.2±6.8±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+→ρ(770)+π0 branching fraction of (11.2±1.1±0.9-1.6+0.8)×10-6, where the third uncertainty is due to possible interference with B+→ρ(1450)+π0. We present the first observation of a structure around 1 GeV/c2 in the π0π0 mass spectrum, with a significance of 6.4σ, and measure a branching fraction to be (6.9±0.9±0.6)×10-6. We also report a measurement of local CP asymmetry in this structure.",

author = "Lai, {Y. T.} and I. Adachi and H. Aihara and {Al Said}, S. and Asner, {D. M.} and H. Atmacan and V. Aulchenko and T. Aushev and R. Ayad and V. Babu and S. Bahinipati and P. Behera and K. Belous and J. Bennett and M. Bessner and B. Bhuyan and T. Bilka and A. Bobrov and J. Borah and A. Bozek and M. Bra{\v c}ko and P. Branchini and Browder, {T. E.} and A. Budano and M. Campajola and D. {\v C}ervenkov and Chang, {M. C.} and P. Chang and V. Chekelian and A. Chen and Cheon, {B. G.} and K. Chilikin and Cho, {H. E.} and K. Cho and Cho, {S. J.} and Choi, {S. K.} and Y. Choi and D. Cinabro and S. Cunliffe and T. Czank and S. Das and {De Nardo}, G. and {De Pietro}, G. and R. Dhamija and {Di Capua}, F. and J. Dingfelder and Z. Dole{\v Z}al and Dong, {T. V.} and T. Ferber and Fulsom, {B. G.} and R. Garg and V. Gaur and N. Gabyshev and A. Giri and P. Goldenzweig and E. Graziani and T. Gu and Y. Guan and K. Gudkova and C. Hadjivasiliou and S. Halder and O. Hartbrich and K. Hayasaka and H. Hayashii and T. Higuchi and Hou, {W. S.} and Hsu, {C. L.} and T. Iijima and K. Inami and A. Ishikawa and R. Itoh and M. Iwasaki and Y. Iwasaki and Jacobs, {W. W.} and Jang, {E. J.} and S. Jia and Y. Jin and Kaliyar, {A. B.} and Kang, {K. H.} and Kim, {C. H.} and Kim, {D. Y.} and Kim, {K. H.} and Kim, {Y. K.} and K. Kinoshita and P. Kody{\v s} and T. Konno and A. Korobov and S. Korpar and E. Kovalenko and P. Kri{\v Z}an and P. Krokovny and M. Kumar and R. Kumar and K. Kumara and A. Kuzmin and Kwon, {Y. J.} and T. Lam and Lange, {J. S.} and M. Laurenza and Lee, {S. C.} and D. Levit and J. Li and Li, {L. K.} and Li, {Y. B.} and {Li Gioi}, L. and J. Libby and K. Lieret and D. Liventsev and A. Martini and M. Masuda and D. Matvienko and F. Meier and M. Merola and F. Metzner and R. Mizuk and Mohanty, {G. B.} and Moon, {T. J.} and M. Mrvar and R. Mussa and M. Nakao and A. Natochii and L. Nayak and Nisar, {N. K.} and S. Nishida and S. Ogawa and G. Pakhlova and T. Pang and S. Pardi and H. Park and Park, {S. H.} and A. Passeri and S. Patra and S. Paul and Pedlar, {T. K.} and R. Pestotnik and Piilonen, {L. E.} and T. Podobnik and E. Prencipe and Prim, {M. T.} and A. Rostomyan and N. Rout and G. Russo and D. Sahoo and Y. Sakai and S. Sandilya and A. Sangal and L. Santelj and T. Sanuki and V. Savinov and G. Schnell and J. Schueler and C. Schwanda and Y. Seino and K. Senyo and Sevior, {M. E.} and M. Shapkin and C. Sharma and Shen, {C. P.} and Shiu, {J. G.} and Singh, {J. B.} and A. Sokolov and E. Solovieva and M. Stari{\v c} and Stottler, {Z. S.} and Strube, {J. F.} and M. Sumihama and K. Sumisawa and W. Sutcliffe and M. Takizawa and U. Tamponi and K. Tanida and F. Tenchini and K. Trabelsi and T. Uglov and Y. Unno and K. Uno and S. Uno and P. Urquijo and {Van Tonder}, R. and G. Varner and Varvell, {K. E.} and A. Vinokurova and A. Vossen and E. Waheed and Wang, {C. H.} and Wang, {X. L.} and M. Watanabe and S. Watanuki and E. Won and Yabsley, {B. D.} and W. Yan and Yang, {S. B.} and H. Ye and J. Yelton and Y. Zhai and Zhang, {Z. P.} and V. Zhilich and V. Zhukova",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2023",

month = may,

day = "5",

doi = "10.1103/PhysRevLett.130.181804",

language = "English",

volume = "130",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "18",

}

Lai, YT, Adachi, I, Aihara, H, Al Said, S, Asner, DM, Atmacan, H, Aulchenko, V, Aushev, T, Ayad, R, Babu, V, Bahinipati, S, Behera, P, Belous, K, Bennett, J, Bessner, M, Bhuyan, B, Bilka, T, Bobrov, A, Borah, J, Bozek, A, Bračko, M, Branchini, P, Browder, TE, Budano, A, Campajola, M, Červenkov, D, Chang, MC, Chang, P, Chekelian, V, Chen, A, Cheon, BG, Chilikin, K, Cho, HE, Cho, K, Cho, SJ, Choi, SK, Choi, Y, Cinabro, D, Cunliffe, S, Czank, T, Das, S, De Nardo, G, De Pietro, G, Dhamija, R, Di Capua, F, Dingfelder, J, DoleŽal, Z, Dong, TV, Ferber, T, Fulsom, BG, Garg, R, Gaur, V, Gabyshev, N, Giri, A, Goldenzweig, P, Graziani, E, Gu, T, Guan, Y, Gudkova, K, Hadjivasiliou, C, Halder, S, Hartbrich, O, Hayasaka, K, Hayashii, H, Higuchi, T, Hou, WS, Hsu, CL, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, M, Iwasaki, Y, Jacobs, WW, Jang, EJ, Jia, S, Jin, Y, Kaliyar, AB, Kang, KH, Kim, CH, Kim, DY, Kim, KH, Kim, YK, Kinoshita, K, Kodyš, P, Konno, T, Korobov, A, Korpar, S, Kovalenko, E, KriŽan, P, Krokovny, P, Kumar, M, Kumar, R, Kumara, K, Kuzmin, A, Kwon, YJ, Lam, T, Lange, JS, Laurenza, M, Lee, SC, Levit, D, Li, J, Li, LK, Li, YB, Li Gioi, L, Libby, J, Lieret, K, Liventsev, D, Martini, A, Masuda, M, Matvienko, D, Meier, F, Merola, M, Metzner, F, Mizuk, R, Mohanty, GB, Moon, TJ, Mrvar, M, Mussa, R, Nakao, M, Natochii, A, Nayak, L, Nisar, NK, Nishida, S, Ogawa, S, Pakhlova, G, Pang, T, Pardi, S, Park, H, Park, SH, Passeri, A, Patra, S, Paul, S, Pedlar, TK, Pestotnik, R, Piilonen, LE, Podobnik, T, Prencipe, E, Prim, MT, Rostomyan, A, Rout, N, Russo, G, Sahoo, D, Sakai, Y, Sandilya, S, Sangal, A, Santelj, L, Sanuki, T, Savinov, V, Schnell, G, Schueler, J, Schwanda, C, Seino, Y, Senyo, K, Sevior, ME, Shapkin, M, Sharma, C, Shen, CP, Shiu, JG, Singh, JB, Sokolov, A, Solovieva, E, Starič, M, Stottler, ZS, Strube, JF, Sumihama, M, Sumisawa, K, Sutcliffe, W, Takizawa, M, Tamponi, U, Tanida, K, Tenchini, F, Trabelsi, K, Uglov, T, Unno, Y, Uno, K, Uno, S, Urquijo, P, Van Tonder, R, Varner, G, Varvell, KE, Vinokurova, A, Vossen, A, Waheed, E, Wang, CH, Wang, XL, Watanabe, M, Watanuki, S, Won, E, Yabsley, BD, Yan, W, Yang, SB, Ye, H, Yelton, J, Zhai, Y, Zhang, ZP, Zhilich, V & Zhukova, V 2023, 'First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry', Physical Review Letters, vol. 130, no. 18, 181804. https://doi.org/10.1103/PhysRevLett.130.181804

TY - JOUR

T1 - First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry

AU - Lai, Y. T.

AU - Adachi, I.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Bahinipati, S.

AU - Behera, P.

AU - Belous, K.

AU - Bennett, J.

AU - Bessner, M.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Bobrov, A.

AU - Borah, J.

AU - Bozek, A.

AU - Bračko, M.

AU - Branchini, P.

AU - Browder, T. E.

AU - Budano, A.

AU - Campajola, M.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Cho, K.

AU - Cho, S. J.

AU - Choi, S. K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Czank, T.

AU - Das, S.

AU - De Nardo, G.

AU - De Pietro, G.

AU - Dhamija, R.

AU - Di Capua, F.

AU - Dingfelder, J.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Garg, R.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Giri, A.

AU - Goldenzweig, P.

AU - Graziani, E.

AU - Gu, T.

AU - Guan, Y.

AU - Gudkova, K.

AU - Hadjivasiliou, C.

AU - Halder, S.

AU - Hartbrich, O.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Higuchi, T.

AU - Hou, W. S.

AU - Hsu, C. L.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Jacobs, W. W.

AU - Jang, E. J.

AU - Jia, S.

AU - Jin, Y.

AU - Kaliyar, A. B.

AU - Kang, K. H.

AU - Kim, C. H.

AU - Kim, D. Y.

AU - Kim, K. H.

AU - Kim, Y. K.

AU - Kinoshita, K.

AU - Kodyš, P.

AU - Konno, T.

AU - Korobov, A.

AU - Korpar, S.

AU - Kovalenko, E.

AU - KriŽan, P.

AU - Krokovny, P.

AU - Kumar, M.

AU - Kumar, R.

AU - Kumara, K.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lam, T.

AU - Lange, J. S.

AU - Laurenza, M.

AU - Lee, S. C.

AU - Levit, D.

AU - Li, J.

AU - Li, L. K.

AU - Li, Y. B.

AU - Li Gioi, L.

AU - Libby, J.

AU - Lieret, K.

AU - Liventsev, D.

AU - Martini, A.

AU - Masuda, M.

AU - Matvienko, D.

AU - Meier, F.

AU - Merola, M.

AU - Metzner, F.

AU - Mizuk, R.

AU - Mohanty, G. B.

AU - Moon, T. J.

AU - Mrvar, M.

AU - Mussa, R.

AU - Nakao, M.

AU - Natochii, A.

AU - Nayak, L.

AU - Nisar, N. K.

AU - Nishida, S.

AU - Ogawa, S.

AU - Pakhlova, G.

AU - Pang, T.

AU - Pardi, S.

AU - Park, H.

AU - Park, S. H.

AU - Passeri, A.

AU - Patra, S.

AU - Paul, S.

AU - Pedlar, T. K.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Podobnik, T.

AU - Prencipe, E.

AU - Prim, M. T.

AU - Rostomyan, A.

AU - Rout, N.

AU - Russo, G.

AU - Sahoo, D.

AU - Sakai, Y.

AU - Sandilya, S.

AU - Sangal, A.

AU - Santelj, L.

AU - Sanuki, T.

AU - Savinov, V.

AU - Schnell, G.

AU - Schueler, J.

AU - Schwanda, C.

AU - Seino, Y.

AU - Senyo, K.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Sharma, C.

AU - Shen, C. P.

AU - Shiu, J. G.

AU - Singh, J. B.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Starič, M.

AU - Stottler, Z. S.

AU - Strube, J. F.

AU - Sumihama, M.

AU - Sumisawa, K.

AU - Sutcliffe, W.

AU - Takizawa, M.

AU - Tamponi, U.

AU - Tanida, K.

AU - Tenchini, F.

AU - Trabelsi, K.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, K.

AU - Uno, S.

AU - Urquijo, P.

AU - Van Tonder, R.

AU - Varner, G.

AU - Varvell, K. E.

AU - Vinokurova, A.

AU - Vossen, A.

AU - Waheed, E.

AU - Wang, C. H.

AU - Wang, X. L.

AU - Watanabe, M.

AU - Watanuki, S.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yan, W.

AU - Yang, S. B.

AU - Ye, H.

AU - Yelton, J.

AU - Zhai, Y.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zhukova, V.

N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2023/5/5

Y1 - 2023/5/5

N2 - We study B+→π+π0π0 using 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10-6 and an inclusive CP asymmetry of (9.2±6.8±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+→ρ(770)+π0 branching fraction of (11.2±1.1±0.9-1.6+0.8)×10-6, where the third uncertainty is due to possible interference with B+→ρ(1450)+π0. We present the first observation of a structure around 1 GeV/c2 in the π0π0 mass spectrum, with a significance of 6.4σ, and measure a branching fraction to be (6.9±0.9±0.6)×10-6. We also report a measurement of local CP asymmetry in this structure.

AB - We study B+→π+π0π0 using 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10-6 and an inclusive CP asymmetry of (9.2±6.8±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+→ρ(770)+π0 branching fraction of (11.2±1.1±0.9-1.6+0.8)×10-6, where the third uncertainty is due to possible interference with B+→ρ(1450)+π0. We present the first observation of a structure around 1 GeV/c2 in the π0π0 mass spectrum, with a significance of 6.4σ, and measure a branching fraction to be (6.9±0.9±0.6)×10-6. We also report a measurement of local CP asymmetry in this structure.

UR - http://www.scopus.com/inward/record.url?scp=85158822325&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.130.181804

DO - 10.1103/PhysRevLett.130.181804

M3 - Article

AN - SCOPUS:85158822325

SN - 0031-9007

VL - 130

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

M1 - 181804

ER -

First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry

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