Dalitz analysis of $D^{0}\to K^{-}\pi^{+}\eta$ decays at Belle
Creators: name: Chen, Y. Q.
name: Li, L. K.
name: Yan, W. B.
name: Adachi, I.
name: Aihara, H.
name: Al Said, S.
name: Asner, D. M.
name: Atmacan, H.
name: Aulchenko, V.
name: Aushev, T.
name: Ayad, R.
name: Babu, V.
name: Badhrees, I.
name: Bahinipati, S.
name: Behera, P.
name: Bennett, J.
name: Bhardwaj, V.
name: Bilka, T.
name: Biswal, J.
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: Choi, S.-K.
name: Choi, Y.
name: Choudhury, S.
name: Cinabro, D.
name: Cunliffe, S.
name: Dash, N.
name: De Nardo, G.
name: Di Capua, F.
name: Doležal, Z.
name: Dong, T. V.
name: Eidelman, S.
name: Epifanov, D.
name: Fast, J. E.
name: Ferber, T.
name: Ferlewicz, D.
name: Fulsom, B. G.
name: Garg, R.
name: Gaur, V.
name: Gabyshev, N.
name: Garmash, A.
name: Giri, A.
name: Goldenzweig, P.
name: Golob, B.
name: Hartbrich, O.
name: Hayasaka, K.
name: Hayashii, H.
name: Hou, W.-S.
name: Hsu, C.-L.
name: Inami, K.
name: Inguglia, G.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, M.
name: Iwasaki, Y.
name: Jacobs, W. W.
name: Jang, E.-J.
name: Jeon, H. B.
name: Jia, S.
name: Jin, Y.
name: Joo, K. K.
name: Kang, K. H.
name: Karyan, G.
name: Kawasaki, T.
name: Kim, D. Y.
name: Kim, S. H.
name: Kimmel, T. D.
name: Kinoshita, K.
name: Kodyš, P.
name: Korpar, S.
name: Križan, P.
name: Kroeger, R.
name: Krokovny, P.
name: Kuhr, T.
name: Kulasiri, R.
name: Kumar, R.
name: Kuzmin, A.
name: Kwon, Y.-J.
name: Lalwani, K.
name: Lange, J. S.
name: Lee, I. S.
name: Lee, S. C.
name: Li, Y. B.
name: Li Gioi, L.
name: Libby, J.
name: Lieret, K.
name: Liventsev, D.
name: MacNaughton, J.
name: MacQueen, C.
name: Masuda, M.
name: Matvienko, D.
name: Merola, M.
name: Miyabayashi, K.
name: Mizuk, R.
name: Mohanty, S.
name: Mussa, R.
name: Nakao, M.
name: Natkaniec, Z.
name: Nayak, M.
name: Nishida, S.
name: Ogawa, S.
name: Ono, H.
name: Oskin, P.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pardi, S.
name: Park, H.
name: Patra, S.
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: Rabusov, A.
name: Ritter, M.
name: Roehrken, Markus
name: Rout, N.
name: Russo, G.
name: Sahoo, D.
name: Sanuki, T.
name: Savinov, V.
name: Schneider, O.
name: Schnell, G.
name: Schueler, J.
name: Schwanda, C.
name: Schwartz, A. J.
name: Seino, Y.
name: Senyo, K.
name: Sevior, M. E.
name: Shapkin, M.
name: Shebalin, V.
name: Shiu, J.-G.
name: Sokolov, A.
name: Solovieva, E.
name: Starič, M.
name: Stottler, Z. S.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Sutcliffe, W.
name: Takizawa, M.
name: Tanida, K.
name: Tenchini, F.
name: Trabelsi, K.
name: Uchida, M.
name: Uglov, T.
name: Uno, S.
name: Urquijo, P.
name: Varner, G.
name: Vorobyev, V.
name: Wang, C. H.
name: Wang, E.
name: Wang, M.-Z.
name: Wang, P.
name: Watanabe, M.
name: Won, E.
name: Xu, X.
name: Yang, S. B.
name: Ye, H.
name: Yin, J. H.
name: Yuan, C. Z.
name: Yusa, Y.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhukova, V.
name: Zhulanov, V.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2020
Subjects: subject: 530
subject: electron positron: annihilation
subject: electron positron: colliding beams
subject: resonance: decay
subject: D0: hadronic decay
subject: D0: branching ratio
subject: branching ratio: ratio: measured
subject: measure: ratio
subject: K*(892)
subject: a0(980)
subject: a2(1320)
subject: K*(1410)
subject: K*(1680)
subject: K*2(1980)
subject: intermediate state
subject: Dalitz plot
subject: mass spectrum: (K pi)
subject: mass spectrum: (pi eta)
subject: BELLE
subject: statistical
subject: KEK-B
subject: experimental results
subject: D0 --&gt; K- pi+ eta

description: Physical review / D D 102(1), 1-11 (2020). doi:10.1103/PhysRevD.102.012002
description: We present the results of the first Dalitz plot analysis of the decay $D^{0}\to K^{-}\pi^{+}\eta$. The analysis is performed on a data set corresponding to an integrated luminosity of 953 fb$^{-1}$ collected by the Belle detector at the asymmetric-energy e$^+$e$^-$ KEKB collider. The Dalitz plot is well described by a combination of the six resonant decay channels $\bar{K}$*(892)0η, $K^{-}$a$_0$(980)+, $K^{-}$a$_2$(1320)+, $K$¯*(1410)0η, $K$*(1680)-π+ and $K_2^*$(1980)-π+, together with $K$π and $K$η S-wave components. The decays $K$*(1680)-→$K^-$η and $K_2^*$(1980)$^-$→$K^-$η are observed for the first time. We measure ratio of the branching fractions, $\frac{B(D^{0}\to K^{-}\pi^{+}\eta)} {B(D^{0}\to K^{-}\pi^{+})}$=0.500±0.002(stat)±0.020(syst)±0.003($B_{PDG}$). Using the Dalitz fit result, the ratio $\frac{B(K*(1680)→Kη)} {B(K*(1680)→Kπ)}$ is measured to be 0.11±0.02(stat)$_{-0.04} ^{+0.06}$(syst)±0.04($B_{PDG}$); this is much lower than the theoretical expectations (≈1) made under the assumption that K*(1680) is a pure 1$^3D_1$ state. The product branching fraction $B(D^0$→[$K_2^*$(1980)$^-$→$K^-$η]π+)=(2.2$_{-1.9}^{+1.7}$)×10$^{-4}$ is determined. In addition, the πη′ contribution to the a$_0$(980)$^{±}$ resonance shape is confirmed with 10.1σ statistical significance using the three-channel Flatté model. We also measure $B(D^0$→$\bar{K}$*(892)$^0$η)=(1.41$_{-0.12}^{+0.13}$)%. This is consistent with, and more precise than, the current world average (1.02±0.30)%, deviates with a significance of more than 3σ from the theoretical predictions of (0.51–0.92)%.
description: Published by Inst.302363, Melville, NY