%0 Electronic Article
%A Li, L. K.
%A Schwartz, A. J.
%A Kinoshita, K.
%A Adachi, I.
%A Aihara, H.
%A Al Said, S.
%A Asner, D. M.
%A Atmacan, H.
%A Aulchenko, V.
%A Aushev, T.
%A Ayad, R.
%A Babu, V.
%A Bahinipati, S.
%A Behera, P.
%A Bennett, J.
%A Bessner, M.
%A Bilka, T.
%A Biswal, J.
%A Bobrov, A.
%A Bonvicini, G.
%A Bozek, A.
%A Bračko, M.
%A Branchini, P.
%A Browder, T. E.
%A Budano, A.
%A Campajola, M.
%A Červenkov, D.
%A Chang, M.-C.
%A Chang, P.
%A Chekelian, V.
%A Chen, A.
%A Chen, Y. Q.
%A Cheon, B. G.
%A Chilikin, K.
%A Cho, H. E.
%A Cho, K.
%A Cho, S.-J.
%A Choi, S.-K.
%A Choi, Y.
%A Choudhury, S.
%A Cinabro, D.
%A Cunliffe, S.
%A Das, S.
%A Dash, N.
%A De Nardo, G.
%A De Pietro, G.
%A Dhamija, R.
%A Di Capua, F.
%A Doležal, Z.
%A Dong, T. V.
%A Eidelman, S.
%A Epifanov, D.
%A Ferber, T.
%A Fulsom, B. G.
%A Garg, R.
%A Gaur, V.
%A Giri, A.
%A Goldenzweig, P.
%A Golob, B.
%A Graziani, E.
%A Gu, T.
%A Guan, Y.
%A Hadjivasiliou, C.
%A Halder, S.
%A Hayasaka, K.
%A Hou, W.-S.
%A Inami, K.
%A Ishikawa, A.
%A Iwasaki, M.
%A Iwasaki, Y.
%A Jacobs, W. W.
%A Jang, E.-J.
%A Jia, S.
%A Jin, Y.
%A Joo, K. K.
%A Kang, K. H.
%A Karyan, G.
%A Kiesling, C.
%A Kim, C. H.
%A Kim, D. Y.
%A Kim, K.-H.
%A Kim, S. H.
%A Kim, Y.-K.
%A Kodyš, P.
%A Konno, T.
%A Korobov, A.
%A Korpar, S.
%A Kovalenko, E.
%A Križan, P.
%A Kroeger, R.
%A Krokovny, P.
%A Kuhr, T.
%A Kumar, M.
%A Kumara, K.
%A Kuzmin, A.
%A Kwon, Y.-J.
%A Lalwani, K.
%A Laurenza, M.
%A Lee, S. C.
%A Li, C. H.
%A Li Gioi, L.
%A Libby, J.
%A Lieret, K.
%A Liventsev, D.
%A Masuda, M.
%A Matvienko, D.
%A Merola, M.
%A Metzner, F.
%A Miyabayashi, K.
%A Mizuk, R.
%A Mohanty, G. B.
%A Mori, T.
%A Nakao, M.
%A Natkaniec, Z.
%A Natochii, A.
%A Nayak, L.
%A Nayak, M.
%A Niiyama, M.
%A Nisar, N. K.
%A Nishida, S.
%A Nishimura, K.
%A Ono, H.
%A Oskin, P.
%A Pakhlov, P.
%A Pakhlova, G.
%A Pardi, S.
%A Park, S.-H.
%A Passeri, A.
%A Paul, S.
%A Pedlar, T. K.
%A Pestotnik, R.
%A Piilonen, L. E.
%A Podobnik, T.
%A Popov, V.
%A Prencipe, E.
%A Prim, M. T.
%A Rout, N.
%A Russo, G.
%A Sahoo, D.
%A Sakai, Y.
%A Sandilya, S.
%A Sangal, A.
%A Santelj, L.
%A Sanuki, T.
%A Savinov, V.
%A Schnell, G.
%A Schwanda, C.
%A Seino, Y.
%A Senyo, K.
%A Shapkin, M.
%A Sharma, C.
%A Shen, C. P.
%A Shiu, J.-G.
%A Shwartz, B.
%A Sokolov, A.
%A Solovieva, E.
%A Starič, M.
%A Stottler, Z. S.
%A Sumihama, M.
%A Sumiyoshi, T.
%A Takizawa, M.
%A Tanida, K.
%A Tenchini, F.
%A Uchida, M.
%A Uglov, T.
%A Unno, Y.
%A Uno, K.
%A Uno, S.
%A Vahsen, S. E.
%A Van Tonder, R.
%A Varner, G.
%A Vinokurova, A.
%A Waheed, E.
%A Wang, C. H.
%A Wang, M.-Z.
%A Wang, P.
%A Wang, X. L.
%A Watanuki, S.
%A Won, E.
%A Yabsley, B. D.
%A Yan, W. B.
%A Yang, S. B.
%A Ye, H.
%A Yelton, J.
%A Yin, J. H.
%A Yusa, Y.
%A Zhang, Z. P.
%A Zhilich, V.
%A Zhukova, V.
%T Measurement of branching fractions and search for CP violation in D<sup>0</sup>→π<sup>+</sup>π<sup>−</sup>η, D<sup>0</sup>→ K<sup>+</sup>K<sup>−</sup>η, and D<sup>0</sup>→ϕη at Belle
%N KEK Preprint 2021-8
%M PUBDB-2021-04651
%M KEK Preprint 2021-8
%M Belle Preprint 2021-11
%M UCHEP-21-03
%M arXiv:2106.04286
%M KEK Preprint 2021-8
%M Belle Preprint 2021-11
%M UCHEP-21-03
%Z 21 pages, 7 figures, 13.09.2021
%X We measure the branching fractions and CP asymmetries for the singly Cabibbo-suppressed decays D<sup>0</sup> → π<sup>+</sup>π<sup>−</sup>η, D<sup>0</sup> → K<sup>+</sup>K<sup>−</sup>η, and D<sup>0</sup> → ϕη, using 980 fb<sup>−1</sup> of data from the Belle experiment at the KEKB e<sup>+</sup>e<sup>−</sup> collider. We obtain  
%X <table class="tabular">
%X <tr><td align="center"><table border="0" cellspacing="0" cellpadding="0"><tr><td nowrap="nowrap" align="center">
%X <i>B</i>(D<sup>0</sup>→ π<sup>+</sup>π<sup>−</sup>η)=[1.22±0.02(stat)±0.02(syst)±0.03(<i>B</i><sub>ref</sub>)]×10<sup>−3</sup>,</td></tr></table></td></tr>
%X <tr><td align="center"><table border="0" cellspacing="0" cellpadding="0"><tr><td nowrap="nowrap" align="center">
%X <i>B</i>(D<sup>0</sup>→ K<sup>+</sup>K<sup>−</sup>η)=[1.80<sub>−0.06</sub><sup>+0.07</sup>(stat)±0.04(syst)±0.05(<i>B</i><sub>ref</sub>)]×10<sup>−4</sup>,</td></tr></table></td></tr>
%X <tr><td align="center"><table border="0" cellspacing="0" cellpadding="0"><tr><td nowrap="nowrap" align="center">
%X <i>B</i>(D<sup>0</sup>→ ϕη)=[1.84±0.09(stat)±0.06(syst)±0.05(<i>B</i><sub>ref</sub>)]×10<sup>−4</sup>,</td></tr></table></td></tr></table>
%X  where the third uncertainty ( <i>B</i> <sub>ref</sub>) is from the uncertainty in the branching fraction of the reference mode D<sup>0</sup> → K<sup>−</sup>π<sup>+</sup>η. The color-suppressed decay D<sup>0</sup> → ϕη is observed for the first time, with very high significance. The results for the CP asymmetries are  
%X <table class="tabular">
%X <tr><td align="center"><table border="0" cellspacing="0" cellpadding="0"><tr><td nowrap="nowrap" align="center">
%X A<sub>CP</sub>(D<sup>0</sup> π<sup>+</sup>π<sup>−</sup>η)=[0.9±1.2(stat)±0.5(syst)]%,</td></tr></table></td></tr>
%X <tr><td align="center"><table border="0" cellspacing="0" cellpadding="0"><tr><td nowrap="nowrap" align="center">
%X A<sub>CP</sub>(D<sup>0</sup>→ K<sup>+</sup>K<sup>−</sup>η)=[−1.4±3.3(stat)±1.1(syst)]%,</td></tr></table></td></tr>
%X <tr><td align="center"><table border="0" cellspacing="0" cellpadding="0"><tr><td nowrap="nowrap" align="center">
%X  ACP (D<sup>0</sup>→ ϕη)=[−1.9±4.4(stat)±0.6(syst)]%.</td></tr></table></td></tr></table>
%X  The results for D<sup>0</sup> → π<sup>+</sup>π<sup>−</sup>η are a significant improvement over previous results. The branching fraction and A<sub>CP</sub> results for D<sup>0</sup> → K<sup>+</sup>K<sup>−</sup>η, and the ACP result for D<sup>0</sup> → ϕη, are the first such measurements. No evidence for CP violation is found in any of these decays.[graphic not available: see fulltext]
%K electron positron: annihilation (INSPIRE)
%K electron positron: colliding beams (INSPIRE)
%K D0: hadronic decay (INSPIRE)
%K eta (INSPIRE)
%K Phi(1020) (INSPIRE)
%K pi+ (INSPIRE)
%K pi- (INSPIRE)
%K asymmetry: CP (INSPIRE)
%K CP: violation (INSPIRE)
%K D0: branching ratio: measured (INSPIRE)
%K BELLE (INSPIRE)
%K KEK-B (INSPIRE)
%K experimental results (INSPIRE)
%K D0 --> pi+ pi- eta (INSPIRE)
%K D0 --> K+ K- eta (INSPIRE)
%K D0 --> Phi(1020) eta (INSPIRE)
%K Branching fraction (autogen)
%K Charm physics (autogen)
%K CP violation (autogen)
%K e+-e− Experiments (autogen)
%F PUB:(DE-HGF)25
%9 Preprint
%U https://bib-pubdb1.desy.de/record/471807