Angular analysis of B⁰ to φ K^{*} decays and search for CP violation at Belle

Belle Collaboration: M. Prim , I. Adachi , H. Aihara , D. M. Asner , T. Aushev , A. M. Bakich , A. Bala , B. Bhuyan

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G. Bonvicini A. Bozek M. Bra\v T. E. Browder D. \v M.-C. Chang P. Chang V. Chekelian A. Chen P. Chen B. G. Cheon R. Chistov K. Cho V. Chobanova Y. Choi D. Cinabro M. Danilov Z. Dole\v Z. Dr\'asal D. Dutta S. Eidelman H. Farhat M. Feindt T. Ferber A. Frey V. Gaur S. Ganguly R. Gillard Y. M. Goh B. Golob H. Hayashii M. Heider Y. Hoshi W.-S. Hou Y. B. Hsiung T. Iijima K. Inami A. Ishikawa R. Itoh I. Jaegle T. Julius D. H. Kah H. Kawai T. Kawasaki H. Kichimi C. Kiesling D. Y. Kim H. O. Kim J. B. Kim J. H. Kim M. J. Kim Y. J. Kim K. Kinoshita J. Klucar B. R. Ko P. Kody\v P. Kri\v P. Krokovny B. Kronenbitter T. Kuhr T. Kumita Y.-J. Kwon J. S. Lange S.-H. Lee J. Li J. Libby P. Lukin D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty A. Moll N. Muramatsu R. Mussa I. Nakamura E. Nakano M. Nakao M. Nayak E. Nedelkovska C. Niebuhr N. K. Nisar S. Nishida O. Nitoh Y. Onuki G. Pakhlova H. Park H. K. Park T. K. Pedlar R. Pestotnik M. Petri\v L. E. Piilonen M. Ritter M. R\"ohrken A. Rostomyan M. Rozanska H. Sahoo T. Saito Y. Sakai S. Sandilya T. Sanuki Y. Sato V. Savinov O. Schneider G. Schnell C. Schwanda D. Semmler K. Senyo M. E. Sevior M. Shapkin C. P. Shen T.-A. Shibata J.-G. Shiu A. Sibidanov Y.-S. Sohn A. Sokolov E. Solovieva M. Stari\v M. Steder T. Sumiyoshi U. Tamponi G. Tatishvili Y. Teramoto K. Trabelsi T. Tsuboyama M. Uchida S. Uehara T. Uglov Y. Unno S. Uno Y. Usov S. E. Vahsen C. Van Hulse P. Vanhoefer G. Varner V. Vorobyev C. H. Wang M.-Z. Wang P. Wang X. L. Wang M. Watanabe Y. Watanabe K. M. Williams E. Won Y. Yamashita S. Yashchenko Z. P. Zhang V. Zhilich A. Zupanc

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classification ✦ hep-ex

keywords timesviolationanalysisbranchingdecaysfractionsmathcalangular

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We report the measurements of branching fractions and CP violation asymmetries in $B^0 \to \phi K^{*}$ decays obtained in an angular analysis using the full data sample of $772 \times 10^6 B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We perform a partial wave analysis to distinguish among scalar [$B^0 \to \phi(K\pi)^{*}_{0}$], vector [$B^0 \to \phi K^{*}(892)^{0}$] and tensor [$B^0 \to \phi K^{*}_{2}(1430)^{0}$] components, and determine the corresponding branching fractions to be $\mathcal{B}[B^0 \to \phi(K\pi)^{*}_{0}] = (4.3 \pm 0.4 \pm 0.4) \times 10^{-6}$, $\mathcal{B}[B^0 \to \phi K^{*}(892)^{0}] = (10.4 \pm 0.5 \pm 0.6) \times 10^{-6}$ and $\mathcal{B}[B^0 \to \phi K^{*}_{2}(1430)^{0}] = (5.5 ^{+0.9}_{-0.7} \pm 1.0) \times 10^{-6}$. We also measure the longitudinal polarization fraction $f_L$ in $B^0 \to \phi K^{*}(892)^{0}$ and $B^0 \to \phi K^{*}_{2}(1430)^{0}$ decays to be $0.499 \pm 0.030 \pm 0.018$ and $0.918 ^{+0.029}_{-0.060} \pm 0.012$, respectively. The first quoted uncertainties are statistical and the second are systematic. In total, we measure 26 parameters related to branching fractions, polarization and CP violation in the $B^0 \to \phi K^{*}$ system. No evidence for CP violation is found.

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Angular analysis of B⁰ to φ K^{*} decays and search for CP violation at Belle

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