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  • Study of $B \to p {\bar p} \pi \pi
    Wang, M. -Z; Adachi, I; Aulchenko, V; Ayad, R; Badhrees, I; Bahinipati, S; Bhuyan, B; Biswal, J; Bonvicini, G; Bozek, A; Bracko, M; Campajola, M; Cervenkov, D; Chekelian, V; Chen, A; Cheon, B. G; Cinabro, D; Dash, N; Dolezal, Z; Eidelman, S; Epifanov, D; Garg, R; Gaur, V; Garmash, A; Giri, A; Hartbrich, O; Hayasaka, K; Hayashii, H; Iijima, T; Inami, K; Ishikawa, A; Iwasaki, M; Jeon, H. B; Jin, Y; Joffe, D; Joo, K. K; Karyan, G; Kim, D. Y; Kim, S. H; Kinoshita, K; Korpar, S; Krizan, P; Kroeger, R; Kwon, Y. -J; Lai, Y. -T; Lee, I. S; Gioi, L. Li; Libby, J; Luo, T; Miyabayashi, K; Nakao, M; Nayak, M; Ono, H; Pakhlov, P; Pakhlova, G; Pang, T; Pardi, S; Park, S. -H; Paul, S; Pedlar, T. K; Popov, V; Prim, M. T; Resmi, P. K; Ritter, M; Rostomyan, A; Rout, N; Russo, G; Sahoo, D; Sakai, Y; Sandilya, S; Savinov, V; Schneider, O; Schwanda, C; Seino, Y; Sevior, M. E; Shiu, J. -G; Solovieva, E; Staric, M; Stottler, Z. S; Takizawa, M; Tamponi, U; Tanida, K; Tenchini, F; Uglov, T; Uno, S; Usov, Y; Varner, G; Vinokurova, A; Wang, B; Wang, P; Wang, X. L; Wiechczynski, J; Won, E; Yang, S. B; Ye, H; Yelton, J; Yusa, Y; Zhang, Z. P; Zhukova, V; Zhulanov, V

    12/2019
    Journal Article

    Phys. Rev. D 101, 052012 (2020) Using a data sample of $772 \times 10^6$ BB pairs collected on the ${\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we report the observations of $B^0\to p{\bar p}\pi^+\pi^-$ and $B^+ \to p{\bar p}\pi^+\pi^0$. We measure a decay branching fraction of $(0.83 \pm 0.17 \pm 0.17) \times 10^-6$ in $B^0\to p{\bar p}\pi^+\pi^-$ for $M_{\pi^+\pi^-} < 1.22 GeV/c^2$ with a significance of 5.5 standard deviations. The contribution from $B0 \to p{\bar p}K^0$ is excluded. We measure a decay branching fraction of $(4.58 \pm 1.17 \pm 0.67) \times 10^-6$ for $B^+ \to p{\bar p}\pi^+\pi^0$ with $M_{\pi^+\pi^0} < 1.3 GeV/c^2$ with a significance of 5.4 standard deviations. We study the difference of the $M_{p{\bar p}}$ distributions in $B^0\to p{\bar p}\pi^+\pi^-$ and $B^+ \to p{\bar p}\pi^+\pi^0$.

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