Measurement of the branching fraction and $CP$ asymmetry for $B\to\bar{D}^{0} π$ decays
Creators: name: Belle Collaboration
name: Bloomfield, T.
name: Sevior, M. E.
name: Adachi, I.
name: Aihara, H.
name: Said, S. Al
name: Asner, D. M.
name: Aulchenko, V.
name: Aushev, T.
name: Ayad, R.
name: Babu, V.
name: Bahinipati, S.
name: Behera, P.
name: Bennett, J.
name: Bessner, M.
name: Bilka, T.
name: Biswal, J.
name: Bobrov, A.
name: Bonvicini, G.
name: Bozek, A.
name: Bračko, M.
name: Browder, T. E.
name: Campajola, M.
name: Cao, L.
name: Červenkov, D.
name: Chang, M. -C.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Cho, H. E.
name: Cho, K.
name: Cho, S. -J.
name: Choi, S. -K.
name: Choi, Y.
name: Choudhury, S.
name: Cinabro, D.
name: Cunliffe, S.
name: Das, S.
name: Dash, N.
name: De Nardo, G.
name: Dhamija, R.
name: Di Capua, F.
name: Doležal, Z.
name: Dong, T. V.
name: Dubey, S.
name: Eidelman, S.
name: Epifanov, D.
name: Ferber, T.
name: Ferlewicz, D.
name: Fulsom, B. G.
name: Garg, R.
name: Gaur, V.
name: Garmash, A.
name: Giri, A.
name: Goldenzweig, P.
name: Hadjivasiliou, C.
name: Halder, S.
name: Hartbrich, O.
name: Hayasaka, K.
name: Hayashii, H.
name: Hedges, M. T.
name: Villanueva, M. Hernandez
name: Hou, W. -S.
name: Hsu, C. -L.
name: Iijima, T.
name: Inguglia, G.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, M.
name: Iwasaki, Y.
name: Jacobs, W. W.
name: Jang, E. -J.
name: Jia, S.
name: Jin, Y.
name: Joo, C. W.
name: Joo, K. K.
name: Kaliyar, A. B.
name: Kang, K. H.
name: Karyan, G.
name: Kawasaki, T.
name: Kim, C. H.
name: Kim, D. Y.
name: Kim, H. J.
name: Kim, S. H.
name: Kim, Y. -K.
name: Kimmel, T. D.
name: Kodyš, P.
name: Konno, T.
name: Korobov, A.
name: Korpar, S.
name: Kovalenko, E.
name: Križan, P.
name: Kroeger, R.
name: Krokovny, P.
name: Kumar, M.
name: Kumar, R.
name: Kumara, K.
name: Kwon, Y. -J.
name: Lalwani, K.
name: Lange, J. S.
name: Lee, I. S.
name: Lee, S. C.
name: Li, C. H.
name: Li, J.
name: Li, Y. B.
name: Gioi, L. Li
name: Libby, J.
name: Lieret, K.
name: Liventsev, D.
name: Luo, T.
name: MacQueen, C.
name: Masuda, M.
name: Matsuda, T.
name: Matvienko, D.
name: Merola, M.
name: Metzner, F.
name: Miyabayashi, K.
name: Mizuk, R.
name: Mohanty, G. B.
name: Mohanty, S.
name: Moon, H. K.
name: Mussa, R.
name: Nakao, M.
name: Natkaniec, Z.
name: Natochii, A.
name: Nayak, L.
name: Nayak, M.
name: Niiyama, M.
name: Nisar, N. K.
name: Nishida, S.
name: Ono, H.
name: Onuki, Y.
name: Oskin, P.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pardi, S.
name: Park, H.
name: Park, S. -H.
name: Paul, S.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Piilonen, L. E.
name: Podobnik, T.
name: Popov, V.
name: Prencipe, E.
name: Prim, M. T.
name: Ritter, M.
name: Rostomyan, A.
name: Rout, N.
name: Rozanska, M.
name: Russo, G.
name: Sahoo, D.
name: Sakai, Y.
name: Sandilya, S.
name: Sangal, A.
name: Santelj, L.
name: Sanuki, T.
name: Savinov, V.
name: Schnell, G.
name: Schueler, J.
name: Schwanda, C.
name: Schwartz, A. J.
name: Seino, Y.
name: Senyo, K.
name: Shapkin, M.
name: Sharma, C.
name: Shen, C. P.
name: Shiu, J. -G.
name: Shwartz, B.
name: Simon, F.
name: Sokolov, A.
name: Solovieva, E.
name: Starič, M.
name: Stottler, Z. S.
name: Strube, J. F.
name: Sumihama, M.
name: Sumisawa, K.
name: Sumiyoshi, T.
name: Sutcliffe, W.
name: Takizawa, M.
name: Tanida, K.
name: Tao, Y.
name: Tenchini, F.
name: Trabelsi, K.
name: Uchida, M.
name: Uno, K.
name: Uno, S.
name: Usov, Y.
name: Vahsen, S. E.
name: Van Tonder, R.
name: Varner, G.
name: Varvell, K. E.
name: Vossen, A.
name: Waheed, E.
name: Wang, C. H.
name: Wang, E.
name: Wang, M. -Z.
name: Wang, P.
name: Watanabe, M.
name: Watanuki, S.
name: Werbycka, O.
name: Wiechczynski, J.
name: Won, E.
name: Xu, X.
name: Yabsley, B. D.
name: Yan, W.
name: Yang, S. B.
name: Ye, H.
name: Yin, J. H.
name: Yuan, C. Z.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhukova, V.
name: Zhulanov, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We measure the branching fractions and $CP$ asymmetries for the decays $B^{0}\to \bar{D}^{0}π^{0}$ and $B^{+}\to \bar{D}^{0}π^{+}$, using a data sample of $772\times 10^{6}$ $B\bar{B}$ pairs collected at the $Υ(4S)$ resonance with the Belle detector at the KEKB $e^{+}e^{-}$ collider. The branching fractions obtained and direct $CP$ asymmetries are $\mathcal{B}(B^{0}\to \bar{D}^{0}π^{0}) = [2.70 \pm 0.06~ \text{(stat.)} \pm 0.10~ \text{(syst.)}] \times 10^{-4}$, $\mathcal{B}(B^{+}\to \bar{D}^{0}π^{+}) = [4.53 \pm 0.02~ \text{(stat.)} \pm 0.15~ \text{(syst.)}] \times 10^{-3}$, $ {\cal A}_{CP}(B^{0}\to \bar{D}^{0}π^{0}) = [+0.42 \pm 2.05~ \text{(stat.)} \pm 1.22~ \text{(syst.)}]\%$, and $ {\cal A}_{CP}(B^{+}\to \bar{D}^{0}π^{+}) = [+0.19 \pm 0.36~ \text{(stat.)} \pm 0.57~ \text{(syst.)}]\%$. The measurements of $\mathcal{B}$ are the most precise to date and are in good agreement with previous results, as is the measurement of ${\cal A}_{CP}(B^{+}\to \bar{D}^{0}π^{+})$. The measurement of ${\cal A}_{CP}$ for $B^{0}\to \bar{D}^{0}π^{0}$ is the first for this mode, and the value is consistent with Standard Model expectations.
description: 13 pages, 4 captioned figures, plus supplemental material. Accepted by Phys. Rev. D. Updated for typos and clarity based on journal review