First measurement of the $B^{+}\toπ^{+}π^{0}π^{0}$ branching fraction and \textit{CP} asymmetry
查看更多>>作者：Belle Collaboration；Lai Y. -T.；Adachi I.；Aihara H.；Said S. Al；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.；Bozek A.；Bračko M.；Branchini P.；Browder T. E.；Budano A.；Campajola M.；Červenkov D.；Chang M. -C.；Chang P.；Chekelian V.；Chen A.；Cheon B. G.；Chilikin K.；Cho H. E.；Cho K.；Cho S. -J.；Choi S. -K.；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 T. V.；Ferber T.；Fulsom B. G.；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 W. -S.；Hsu C. -L.；Iijima T.；Inami K.；Ishikawa A.；Itoh R.；Iwasaki M.；Iwasaki Y.；Jacobs W. W.；Jang E. -J.；Jia S.；Jin Y.；Kaliyar A. B.；Kang K. H.；Kim C. H.；Kim D. Y.；Kim K. -H.；Kim Y. -K.；Kinoshita K.；Kodyš P.；Konno T.；Korobov A.；Korpar S.；Kovalenko E.；Križan P.；Kroeger R.；Krokovny P.；Kumar M.；Kumar R.；Kumara K.；Kuzmin A.；Kwon Y. -J.；Lam T.；Lange J. S.；Laurenza M.；Lee S. C.；Levit D.；Li J.；Li L. K.；Li Y. B.；Gioi L. Li；Libby J.；Lieret K.；Liventsev D.；Martini A.；Masuda M.；Matvienko D.；Meier F.；Merola M.；Metzner F.；Miyabayashi K.；Mizuk R.；Mohanty G. B.；Moon T. J.；Mrvar M.；Mussa R.；Nakao M.；Natochii A.；Nayak L.；Nisar N. K.；Nishida S.；Ogawa S.；Pakhlova G.；Pang T.；Pardi S.；Park H.；Park S. -H.；Passeri A.；Patra S.；Paul S.；Pedlar T. K.；Pestotnik R.；Piilonen L. E.；Podobnik T.；Prencipe E.；Prim M. T.；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 M. E.；Shapkin M.；Sharma C.；Shen C. P.；Shiu J. -G.；Singh J. B.；Sokolov A.；Solovieva E.；Starič M.；Stottler Z. S.；Strube J. F.；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 K. E.；Vinokurova A.；Vossen A.；Waheed E.；Wang C. H.；Wang X. L.；Watanabe M.；Watanuki S.；Won E.；Yabsley B. D.；Yan W.；Yang S. B.；Ye H.；Yelton J.；Zhai Y.；Zhang Z. P.；Zhilich V.；Zhukova V.
- 创建日期：2024-04-11
- 发布日期：2024-04-11
- 最新更新日期：2022-10-01
简介：
查看更多>>We study $B^{+}\to π^{+}π^{0}π^{0}$ using 711 $\rm{fb}^{-1}$ 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 $(19.0\pm 1.5\pm 1.4)\times 10^{-6}$ and an inclusive \textit{CP} asymmetry of $(9.2 \pm 6.8 \pm 0.7)\%$, where the first uncertainties are statistical and the second are systematic; and a $B^{+}\to ρ(770)^{+}π^{0}$ branching fraction of $(11.2\pm 1.1\pm 0.9 ^{+0.8}_{-1.6})\times 10^{-6}$, where the third uncertainty is due to possible interference with $B^{+}\to ρ(1450)^{+}π^{0}$. We present the first observation of a structure around 1 GeV/$c^{2}$ in the $π^{0}π^{0}$ mass spectrum, with a significance of 6.4$σ$, and measure a branching fraction to be $(6.9\pm 0.9\pm 0.6)\times 10^{-6}$. We also report a measurement of local \textit{CP} asymmetry in this structure.
DOI10.48550/arxiv.2208.01855
