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arXiv · 1505.03362

Study of $D^{**}$ production and light hadronic states in the $\bar{B}^0 \to D^{*+} \omega \pi^-$ decay

Belle Collaboration·D. Matvienko·A. Kuzmin·S. Eidelman·A. Abdesselam·I. Adachi·H. Aihara·S. Al Said·K. Arinstein·D. M. Asner·V. Aulchenko·T. Aushev·R. Ayad·V. Babu·I. Badhrees·S. Bahinipati·A. M. Bakich·V. Bansal·V. Bhardwaj·B. Bhuyan·J. Biswal·A. Bobrov·A. Bondar·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·D. Červenkov·A. Chen·B. G. Cheon·K. Chilikin·R. Chistov·K. Cho·V. Chobanova·S. -K. Choi·D. Cinabro·J. Dalseno·J. Dingfelder·Z. Doležal·Z. Drásal·A. Drutskoy·D. Dutta·D. Epifanov·H. Farhat·J. E. Fast·T. Ferber·B. G. Fulsom·V. Gaur·N. Gabyshev·A. Garmash·D. Getzkow·R. Gillard·Y. M. Goh·P. Goldenzweig·B. Golob·T. Hara·K. Hayasaka·H. Hayashii·X. H. He·W. -S. Hou·T. Iijima·G. Inguglia·A. Ishikawa·R. Itoh·Y. Iwasaki·I. Jaegle·D. Joffe·K. K. Joo·T. Julius·T. Kawasaki·D. Y. Kim·J. B. Kim·J. H. Kim·K. T. Kim·M. J. Kim·S. H. Kim·Y. J. Kim·B. R. Ko·P. Kodyš·S. Korpar·P. Krokovny·R. Kumar·J. S. Lange·D. H. Lee·L. Li Gioi·J. Libby·D. Liventsev·K. Miyabayashi·H. Miyata·R. Mizuk·G. B. Mohanty·A. Moll·R. Mussa·E. Nakano·M. Nakao·T. Nanut·M. Nayak·N. K. Nisar·S. Nishida·S. Ogawa
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Abstract

We report on the first observations of $\bar{B}^0 \to D_1(2430)^0 \omega$, $\bar{B}^0 \to D_1(2420)^0 \omega$ and $\bar{B}^0 \to D^*_2(2460)^0 \omega$ decays. The $\bar{B}^0 \to D^{*+} \rho(1450)^-$ decay is also observed. The branching fraction measurements are based on $(771.6 \pm 10.6)\times 10^6$ $B\bar{B}$ events collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The fractions of longitudinal polarization of the $D^{**}$ states as well as partial wave fractions of the $D_1(2430)^0$ are obtained. We also set a $90\%$ confidence level upper limit for the product of branching fractions of $\mathcal{B}(\bar{B}^0 \to D^{*+} b_1(1235)^-) \times \mathcal{B}(b_1(1235)^- \to \omega \pi^-)$. The measurements show evidence of nontrivial final-state interaction phases for the $\rho$-like amplitudes.

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Belle Collaboration, D. Matvienko, A. Kuzmin, S. Eidelman, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, D. Cinabro, J. Dalseno, J. Dingfelder, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, T. Kawasaki, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, S. Korpar, P. Krokovny, R. Kumar, J. S. Lange, D. H. Lee, L. Li Gioi, J. Libby, D. Liventsev, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, T. Nanut, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa. 2015-05-13. Study of $D^{**}$ production and light hadronic states in the $\bar{B}^0 \to D^{*+} \omega \pi^-$ decay. https://doi.org/10.1103/physrevd.92.012013

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