Study of the B→X(3872)(→D*0D̄0)K decay

  • T. Aushev
  • , N. Zwahlen
  • , I. Adachi
  • , H. Aihara
  • , A. M. Bakich
  • , V. Balagura
  • , A. Bay
  • , K. Belous
  • , V. Bhardwaj
  • , M. Bischofberger
  • , A. Bondar
  • , A. Bozek
  • , J. Brodzicka
  • , T. E. Browder
  • , Y. Chao
  • , A. Chen
  • , P. Chen
  • , B. G. Cheon
  • , C. C. Chiang
  • , R. Chistov
  • I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, B. Y. Han, H. Hayashii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, T. Julius, D. H. Kah, J. H. Kang, P. Kapusta, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, R. Kumar, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, A. Sokolov, E. Solovieva, M. Starič, T. Sumiyoshi, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

Research output: Contribution to journalArticlepeer-review

Abstract

We present a study of B→X(3872)K with X(3872) decaying to D*0D̄0 using a sample of 657×106 BB̄ pairs recorded at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Both D*0→D0γ and D*0→D0π0 decay modes are used. We find a peak of 50.1-11.1+14.8 events with a mass of (3872.9-0.4-0.5+0.6+0.4)MeV/c2, a width of (3.9-1.4-1.1+2.8+0.2)MeV/c2 and a product branching fraction B(B→X(3872)K)×B(X(3872)→D*0D̄0)=(0. 80±0.20±0.10)×10-4, where the first errors are statistical and the second ones are systematic. The significance of the signal is 6.4σ. The difference between the fitted mass and the D*0D̄0 threshold is calculated to be (1.1-0.4-0.3+0.6+0.1)MeV/c2. We also obtain an upper limit on the product of branching fractions B(B→Y(3940)K) ×B(Y(3940)→D*0D̄0) of 0.67×10 -4 at 90% CL.

Original languageEnglish
Article number031103
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume81
Issue number3
DOIs
Publication statusPublished - 22 Feb 2010
Externally publishedYes

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