Observation of $Ω(2012)^- \to Ξ(1530)\bar{K}$ and measurement of the effective couplings of $Ω(2012)^-$ to $Ξ(1530)\bar{K}$ and $Ξ\bar{K}$
Creators: name: Belle Collaboration
name: Jia, S.
name: Shen, C. P.
name: Yuan, C. Z.
name: Ahn, J. K.
name: Aihara, H.
name: Asner, D. M.
name: Atmacan, H.
name: Ayad, R.
name: Bahinipati, S.
name: Banerjee, Sw.
name: Bennett, J.
name: Bessner, M.
name: Biswas, D.
name: Bračko, M.
name: Branchini, P.
name: Budano, A.
name: Campajola, M.
name: Chang, M. -C.
name: Cheon, B. G.
name: Cho, H. E.
name: Choi, S. -K.
name: Choi, Y.
name: Choudhury, S.
name: De Pietro, G.
name: Dhamija, R.
name: Di Capua, F.
name: Dingfelder, J.
name: Ecker, P.
name: Epifanov, D.
name: Ferber, T.
name: Ferlewicz, D.
name: Fulsom, B. G.
name: Gaur, V.
name: Garmash, A.
name: Giri, A.
name: Goldenzweig, P.
name: Graziani, E.
name: Greenwald, D.
name: Gudkova, K.
name: Hadjivasiliou, C.
name: Herrmann, D.
name: Hou, W. -S.
name: Ipsita, N.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, M.
name: Jacobs, W. W.
name: Jin, Y.
name: Joo, K. K.
name: Kiesling, C.
name: Kim, D. Y.
name: Kim, K. -H.
name: Kim, Y. -K.
name: Kinoshita, K.
name: Kodyš, P.
name: Korobov, A.
name: Kovalenko, E.
name: Križan, P.
name: Krokovny, P.
name: Kumar, R.
name: Kumara, K.
name: Kumita, T.
name: Kwon, Y. -J.
name: Lam, T.
name: Li, L. K.
name: Li, S. X.
name: Li, Y. B.
name: Liventsev, D.
name: Masuda, M.
name: Matvienko, D.
name: Maurya, S. K.
name: Meier, F.
name: Merola, M.
name: Mizuk, R.
name: Mussa, R.
name: Nakao, M.
name: Natochii, A.
name: Niiyama, M.
name: Nishida, S.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pardi, S.
name: Park, J.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Piilonen, L. E.
name: Podobnik, T.
name: Prencipe, E.
name: Prim, M. T.
name: Russo, G.
name: Sandilya, S.
name: Schnell, G.
name: Schwanda, C.
name: Seino, Y.
name: Senyo, K.
name: Shan, W.
name: Shiu, J. -G.
name: Sokolov, A.
name: Solovieva, E.
name: Starič, M.
name: Sumihama, M.
name: Takizawa, M.
name: Tamponi, U.
name: Tanida, K.
name: Tenchini, F.
name: Unno, Y.
name: Uno, S.
name: Urquijo, P.
name: Usov, Y.
name: Wang, M. -Z.
name: Won, E.
name: Yabsley, B. D.
name: Yan, W.
name: Yelton, J.
name: Yin, J. H.
name: Yuan, L.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhukova, V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using $Υ(1S)$, $Υ(2S)$, and $Υ(3S)$ data collected by the Belle detector, we discover a new three-body decay, $Ω(2012)^-\toΞ(1530)\bar K\toΞπ\bar K$, with a significance of 5.2~$σ$. The mass of the $Ω(2012)^-$ is $(2012.5\pm0.7\pm0.5)$ MeV and its effective couplings to $Ξ(1530)\bar{K}$ and $Ξ\bar{K}$ are $(39^{+31}_{-39}\pm9)\times10^{-2}$ and $(1.7\pm0.3\pm0.3)\times10^{-2}$, where the first uncertainties are statistical and the second are systematic. The ratio of the branching fraction for the three-body decay to that for the two-body decay to $Ξ\bar{K}$ is $0.99\pm0.26\pm0.06$, assuming isospin symmetry.
description: 6 pages, 4 figures, add more Omega(2012) three-body decay modes, updated version