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arXiv · 1309.0575

Measurement of $e^+ e^- \to ωπ^0$, $K^{\ast}(892)\bar{K}$ and $K_2^{\ast}(1430)\bar{K}$ at $\sqrt{s}$ near 10.6 GeV

Belle Collaboration·C. P. Shen·C. Z. Yuan·A. Sibidanov·P. Wang·K. Hayasaka·X. L. Wang·I. Adachi·H. Aihara·D. M. Asner·T. Aushev·A. M. Bakich·A. Bala·V. Bhardwaj·B. Bhuyan·A. Bondar·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·M. -C. Chang·A. Chen·B. G. Cheon·R. Chistov·I. -S. Cho·K. Cho·V. Chobanova·S. -K. Choi·Y. Choi·D. Cinabro·J. Dalseno·Z. Doležal·Z. Drásal·A. Drutskoy·D. Dutta·S. Eidelman·H. Farhat·J. E. Fast·T. Ferber·A. Frey·V. Gaur·N. Gabyshev·S. Ganguly·R. Gillard·Y. M. Goh·B. Golob·J. Haba·H. Hayashii·Y. Hoshi·W. -S. Hou·H. J. Hyun·T. Iijima·A. Ishikawa·R. Itoh·Y. Iwasaki·T. Iwashita·I. Jaegle·T. Julius·D. H. Kah·J. H. Kang·E. Kato·T. Kawasaki·C. Kiesling·D. Y. Kim·H. J. Kim·H. O. Kim·J. B. Kim·J. H. Kim·Y. J. Kim·K. Kinoshita·B. R. Ko·P. Kodyš·S. Korpar·P. Križan·P. Krokovny·T. Kumita·A. Kuzmin·Y. -J. Kwon·J. S. Lange·S. -H. Lee·Y. Li·J. Libby·C. Liu·Y. Liu·P. Lukin·D. Matvienko·H. Miyata·R. Mizuk·A. Moll·T. Mori·N. Muramatsu·R. Mussa·Y. Nagasaka·M. Nakao·Z. Natkaniec·M. Nayak·C. Ng·S. Nishida·O. Nitoh·S. Ogawa
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Abstract

Using data samples of 89 fb$^{-1}$, 703 fb$^{-1}$, and 121 fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider at center-of-mass energies 10.52 GeV, 10.58 GeV, and 10.876 GeV, respectively, we study the exclusive reactions $e^+e^- \to ωπ^0$, $K^{\ast}(892)\bar{K}$, and $K_2^{\ast}(1430)\bar{K}$ (Charge-conjugate modes are included implicitly). Significant signals of $ωπ^0$, $K^{\ast}(892)^0\bar{K}^0$, and $K_2^{\ast}(1430)^-K^+$ are observed for the first time at these energies, and the energy dependencies of the cross sections are presented. On the other hand, no significant excesses for $K^{\ast}(892)^-K^+$ and $K_2^{\ast}(1430)^0 \bar{K}^0$ are found, and we set limits on the cross section ratios $R_{\rm VP} = \frac{σ_B(e^+e^-\to K^{\ast}(892)^0\bar K^0)} {σ_B(e^+e^-\to K^{\ast}(892)^-K^+)}>$ 4.3, 20.0, and 5.4, and $R_{\rm TP} = \frac{σ_B(e^+e^-\to K_2^{\ast}(1430)^0\bar K^0)} {σ_B(e^+e^-\to K_2^{\ast}(1430)^-K^+)}<$ 1.1, 0.4, and 0.6, for center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.876 GeV, respectively, at the 90% C.L.

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Belle Collaboration, C. P. Shen, C. Z. Yuan, A. Sibidanov, P. Wang, K. Hayasaka, X. L. Wang, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. -C. Chang, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, A. Moll, T. Mori, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, Z. Natkaniec, M. Nayak, C. Ng, S. Nishida, O. Nitoh, S. Ogawa. 2013-09-17. Measurement of $e^+ e^- \to ωπ^0$, $K^{\ast}(892)\bar{K}$ and $K_2^{\ast}(1430)\bar{K}$ at $\sqrt{s}$ near 10.6 GeV. https://doi.org/10.1103/physrevd.88.052019

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