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arXiv · 1205.0422

Search for the decay $B^0\to DK^{*0}$ followed by $D\to K^-\pi^+$

The Belle Collaboration·K. Negishi·Y. Horii·Y. Onuki·T. Sanuki·H. Yamamoto·I. Adachi·H. Aihara·D. M. Asner·T. Aushev·A. M. Bakich·Y. Ban·K. Belous·B. Bhuyan·A. Bondar·T. E. Browder·M. -C. Chang·A. Chen·P. Chen·B. G. Cheon·K. Chilikin·R. Chistov·I. -S. Cho·K. Cho·Y. Choi·J. Dalseno·Z. Doležal·Z. Drásal·A. Drutskoy·S. Eidelman·J. E. Fast·V. Gaur·N. Gabyshev·Y. M. Goh·J. Haba·H. Hayashii·Y. Hoshi·W. -S. Hou·H. J. Hyun·T. Iijima·K. Inami·A. Ishikawa·R. Itoh·M. Iwabuchi·Y. Iwasaki·T. Iwashita·T. Julius·J. H. Kang·T. Kawasaki·C. Kiesling·H. J. Kim·J. B. Kim·J. H. Kim·K. T. Kim·M. J. Kim·Y. J. Kim·B. R. Ko·P. Kodyš·S. Korpar·R. T. Kouzes·P. Krokovny·T. Kuhr·Y. -J. Kwon·S. -H. Lee·J. Libby·C. Liu·Y. Liu·Z. Q. Liu·R. Louvot·D. Matvienko·S. McOnie·K. Miyabayashi·H. Miyata·Y. Miyazaki·D. Mohapatra·A. Moll·N. Muramatsu·E. Nakano·M. Nakao·S. Nishida·K. Nishimura·O. Nitoh·S. Ogawa·T. Ohshima·S. Okuno·G. Pakhlova·H. K. Park·T. K. Pedlar·R. Pestotnik·M. Petrič·L. E. Piilonen·M. Röhrken·S. Ryu·K. Sakai·Y. Sakai·O. Schneider·C. Schwanda·A. J. Schwartz·K. Senyo·M. E. Sevior
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Abstract

We report a study of the decay $B^0\rightarrow D K^+\pi^-$ followed by $D\rightarrow K^-\pi^+$, where $D$ indicates $D^0$ or $\bar{D}^0$. We reconstruct the $D K^+\pi^-$ state in a phase space corresponding to $D K^{*}(892)^0$. The CP-violating angle $\phi_3$ affects its decay rate via the interference between $b\rightarrow u$ and $b\rightarrow c$ transitions. The result is obtained from a 711 ${\rm fb}^{-1}$ data sample that contains 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 measure the ratio ${\cal R}_{DK^{*0}} \equiv \Gamma(B^0\rightarrow [K^-\pi^+]_DK^+\pi^-)/\Gamma(B^0\rightarrow [K^+\pi^-]_DK^+\pi^-)$ to be $(4.1 ^{+ 5.6 + 2.8}_{- 5.0 - 1.8}) \times 10^{-2}$, and set an upper limit of ${\cal R}_{DK^{*0}} < 0.16$ at the 95% confidence level.

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The Belle Collaboration, K. Negishi, Y. Horii, Y. Onuki, T. Sanuki, H. Yamamoto, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, Y. Ban, K. Belous, B. Bhuyan, A. Bondar, T. E. Browder, M. -C. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, Y. Choi, J. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, Y. M. Goh, J. Haba, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, S. Korpar, R. T. Kouzes, P. Krokovny, T. Kuhr, Y. -J. Kwon, S. -H. Lee, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, D. Mohapatra, A. Moll, N. Muramatsu, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, G. Pakhlova, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior. 2012-05-02. Search for the decay $B^0\to DK^{*0}$ followed by $D\to K^-\pi^+$. https://doi.org/10.1103/physrevd.86.011101

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