Dalitz analysis of B → K π + ψ ′ decays and the Z ( 4430 ) + </…
2009; American Physical Society; Volume: 80; Issue: 3 Linguagem: Inglês
10.1103/physrevd.80.031104
ISSN1550-7998
AutoresR. Mizuk, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. L. Barberio, A. Bay, K. Belous, V. Bhardwaj, A. Bożek, M. Bračko, T. E. Browder, M.-C. Chang, K. F. Chen, B. G. Cheon, C.-C. Chiang, R. Chistov, I.-S. Cho, S.-K. Choi, Y. Choi, J. Dalseno, M. Danilov, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, B.-Y. Han, T. Hara, Y. Hasegawa, K. Hayasaka, Y. Hoshi, W.-S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, M. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, S.-H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, Cheng Liu, Y. Liu, D. Liventsev, R. Louvot, D. Marlow, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Kenichi Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. Sekiya, K. Senyo, M. Shapkin, V. Shebalin, J.-G. Shiu, B. Shwartz, S. Stanič, M. Starič, T. Sumiyoshi, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhulanov, T. Živko, A. Zupanc, O. Zyukova,
Tópico(s)High-Energy Particle Collisions Research
ResumoFrom a Dalitz plot analysis of $B\ensuremath{\rightarrow}K{\ensuremath{\pi}}^{+}{\ensuremath{\psi}}^{\ensuremath{'}}$ decays, we find a signal for $Z(4430{)}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\psi}}^{\ensuremath{'}}$ with a mass $M=({4443}_{\ensuremath{-}12\ensuremath{-}13}^{+15+19})\text{ }\text{ }\mathrm{MeV}/{c}^{2}$, width $\ensuremath{\Gamma}=({107}_{\ensuremath{-}43\ensuremath{-}56}^{+86+74})\text{ }\text{ }\mathrm{MeV}$, product branching fraction $\mathcal{B}({\overline{B}}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}Z(4430{)}^{+})\ifmmode\times\else\texttimes\fi{}\mathcal{B}(Z(4430{)}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\psi}}^{\ensuremath{'}})=({3.2}_{\ensuremath{-}0.9\ensuremath{-}1.6}^{+1.8+5.3})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, and significance of $6.4\ensuremath{\sigma}$ that agrees with previous Belle measurements based on the same data sample. In addition, we determine the branching fraction $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}{K}^{*}(892{)}^{0}{\ensuremath{\psi}}^{\ensuremath{'}})=({5.52}_{\ensuremath{-}0.32\ensuremath{-}0.58}^{+0.35+0.53})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and the fraction of ${K}^{*}(892{)}^{0}$ mesons that are longitudinally polarized ${f}_{L}=({44.8}_{\ensuremath{-}2.7\ensuremath{-}5.3}^{+4.0+4.0})%$. These results are obtained from a $605\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample that contains $657\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected near the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider.
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