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arxiv: 1408.6343 · v1 · submitted 2014-08-27 · ✦ hep-ex

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Observation of the decay B⁰ to η' K^*(892)⁰

Belle Collaboration: S. Sato , Y. Yusa , G. B. Mohanty , A. Abdesselam , I. Adachi , H. Aihara , S. Al Said , D. M. Asner
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T. Aushev R. Ayad S. Bahinipati A. M. Bakich V. Bansal V. Bhardwaj B. Bhuyan G. Bonvicini A. Bozek M. Bra\v{c}ko T. E. Browder D. \v{C}ervenkov P. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin K. Cho V. Chobanova Y. Choi D. Cinabro J. Dalseno M. Danilov Z. Dole\v{z}al Z. Dr\'asal A. Drutskoy S. Eidelman H. Farhat J. E. Fast T. Ferber O. Frost V. Gaur S. Ganguly A. Garmash R. Gillard R. Glattauer Y. M. Goh B. Golob O. Grzymkowska K. Hayasaka H. Hayashii X. H. He T. Higuchi W.-S. Hou M. Huschle T. Iijima K. Inami A. Ishikawa R. Itoh Y. Iwasaki I. Jaegle K. K. Joo T. Julius E. Kato T. Kawasaki D. Y. Kim J. B. Kim J. H. Kim K. T. Kim M. J. Kim Y. J. Kim K. Kinoshita J. Klucar B. R. Ko P. Kody\v{s} S. Korpar P. Kri\v{z}an P. Krokovny T. Kuhr T. Kumita Y.-J. Kwon J. Li Y. Li J. Libby D. Liventsev D. Matvienko K. Miyabayashi H. Miyata R. Mizuk A. Moll E. Nakano M. Nakao T. Nanut Z. Natkaniec E. Nedelkovska N. K. Nisar S. Nishida S. Ogawa S. Okuno P. Pakhlov G. Pakhlova H. Park T. K. Pedlar M. Petri\v{c} L. E. Piilonen M. Ritter A. Rostomyan Y. Sakai S. Sandilya L. Santelj T. Sanuki Y. Sato V. Savinov O. Schneider G. Schnell C. Schwanda A. J. Schwartz D. Semmler K. Senyo O. Seon M. E. Sevior V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz A. Sibidanov F. Simon Y.-S. Sohn A. Sokolov E. Solovieva M. Stari\v{c} M. Steder J. Stypula M. Sumihama U. Tamponi G. Tatishvili Y. Teramoto F. Thorne K. Trabelsi M. Uchida S. Uehara T. Uglov Y. Unno S. Uno C. Van Hulse P. Vanhoefer G. Varner V. Vorobyev M. N. Wagner C. H. Wang M.-Z. Wang P. Wang X. L. Wang M. Watanabe Y. Watanabe S. Wehle K. M. Williams E. Won S. Yashchenko Y. Yook Z. P. Zhang V. Zhilich V. Zhulanov A. Zupanc
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classification ✦ hep-ex
keywords decaystatsysttimesasymmetricasymmetrybellebranching
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We report a search for charmless hadronic decays of neutral $B$ mesons to $\eta' K^{*}(892)^{0}$. The results are based on a 711fb$^{-1}$ data sample that contains $772\times 10^6 B\overline{B}$ pairs, collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider. We observe the decay for the first time with a significance of 5.0 standard deviations and obtain its branching fraction ${\cal B}[B^0\to\eta' K^{*}(892)^{0}]=[2.6\pm0.7{\rm (stat)}\pm0.2{\rm (syst)}]\times 10^{-6}$. We also measure the $CP$ violating asymmetry as ${\cal A}_{CP}[B^0\to\eta' K^{*}(892)^{0}]=-0.22\pm0.29{\rm (stat)}\pm0.07{\rm syst}$.

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