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

Publication ,  Journal Article
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 ...
Published in: Physical Review D
December 1, 2017

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.

Duke Scholars

Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

December 1, 2017

Volume

96

Issue

11
 

Citation

APA
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MLA
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Julius, T., Sevior, M. E., Mohanty, G. B., Adachi, I., Aihara, H., Al Said, S., … Liventsev, D. (2017). Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2. Physical Review D, 96(11). https://doi.org/10.1103/PhysRevD.96.032007
Julius, T., M. E. Sevior, G. B. Mohanty, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, et al. “Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2.” Physical Review D 96, no. 11 (December 1, 2017). https://doi.org/10.1103/PhysRevD.96.032007.
Julius T, Sevior ME, Mohanty GB, Adachi I, Aihara H, Al Said S, et al. Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2. Physical Review D. 2017 Dec 1;96(11).
Julius, T., et al. “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, Dec. 2017. Scopus, doi:10.1103/PhysRevD.96.032007.
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. Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2. Physical Review D. 2017 Dec 1;96(11).

Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

December 1, 2017

Volume

96

Issue

11