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arXiv · 1408.6343

Observation of the decay $B^0 \to η' K^*(892)^0$

Belle Collaboration·S. Sato·Y. Yusa·G. B. Mohanty·A. Abdesselam·I. Adachi·H. Aihara·S. Al Said·D. M. Asner·T. Aushev·R. Ayad·S. Bahinipati·A. M. Bakich·V. Bansal·V. Bhardwaj·B. Bhuyan·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·D. Červenkov·P. Chang·V. Chekelian·A. Chen·B. G. Cheon·K. Chilikin·K. Cho·V. Chobanova·Y. Choi·D. Cinabro·J. Dalseno·M. Danilov·Z. Doležal·Z. Drásal·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. Kodyš·S. Korpar·P. Križan·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
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Abstract

We report a search for charmless hadronic decays of neutral $B$ mesons to $η' K^{*}(892)^{0}$. The results are based on a 711fb$^{-1}$ data sample that contains $772\times 10^6 B\overline{B}$ pairs, collected at the $Υ(4S)$ 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 ${\cal B}[B^0\toη' K^{*}(892)^{0}]=[2.6\pm0.7{\rm (stat)}\pm0.2{\rm (syst)}]\times 10^{-6}$. We also measure the $CP$ violating asymmetry as ${\cal A}_{CP}[B^0\toη' K^{*}(892)^{0}]=-0.22\pm0.29{\rm (stat)}\pm0.07{\rm syst}$.

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Belle Collaboration, S. Sato, Y. Yusa, G. B. Mohanty, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, S. Bahinipati, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, 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. Kodyš, S. Korpar, P. Križan, 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. 2014-08-27. Observation of the decay $B^0 \to η' K^*(892)^0$. https://arxiv.org/abs/1408.6343

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