Study of the B -> X(3872)(-> D*(0)(D)over-bar(0)K decay

  • Aushev, T.
  • Zwahlen, N.
  • Adachi, I.
  • Aihara, H.
  • Bakich, A. M.
  • ... Cheon, B. G.
  • 외 128명
Citations

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108
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122

초록

We present a study of B -> X(3872)K with X(3872) decaying to D*(0)(D) over bar (0) using a sample of 657 x 10(6) B (B) over bar pairs recorded at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Both D*(0) -> D-0 gamma and D*(0) -> D-0 pi(0) 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/c(2), a width of d 3.9(-1.4-1.1)(+2.8+0.2)) MeV/c(2) and a product branching fraction B(B -> X(3872)K) X B(X(3872) -> D*(0)(D) over bar (0)) = (0.80 +/- 0.20 +/- 0.10) X 10(-4), where the first errors are statistical and the second ones are systematic. The significance of the signal is 6.4 sigma. The difference between the fitted mass and the D*(0)(D) over bar (0) threshold is calculated to be (1.1(-0.4-0.3)(+0.6+0.1)) MeV/c(2). We also obtain an upper limit on the product of branching fractions B(B -> Y(3940)K) X B(Y(3940) -> D*(0)(D) over bar (0) of 0.67 X 10(-4) at 90% CL.

키워드

BELLE
제목
Study of the B -> X(3872)(-> D*(0)(D)over-bar(0)K decay
저자
Aushev, T.Zwahlen, N.Adachi, I.Aihara, H.Bakich, A. M.Balagura, V.Bay, A.Belous, K.Bhardwaj, V.Bischofberger, M.Bondar, A.Bozek, A.Brodzicka, J.Browder, T. E.Chao, Y.Chen, A.Chen, P.Cheon, B. G.Chiang, C. -C.Chistov, R.Cho, I. -S.Choi, S. -K.Choi, Y.Dalseno, J.Danilov, M.Drutskoy, A.Eidelman, S.Gabyshev, N.Goldenzweig, P.Ha, H.Haba, J.Han, B. -Y.Hayashii, H.Hoshi, Y.Hou, W. -S.Hyun, H. J.Iijima, T.Inami, K.Itoh, R.Iwabuchi, M.Iwasaki, M.Iwasaki, Y.Joshi, N. J.Julius, T.Kah, D. H.Kang, J. H.Kapusta, P.Kawasaki, T.Kim, H. J.Kim, H. O.Kim, J. H.Kim, Y. I.Kim, Y. J.Ko, B. R.Korpar, S.Krizan, P.Krokovny, P.Kuhr, T.Kumar, R.Kwon, Y. -J.Lange, J. S.Lee, S. -H.Li, J.Liu, C.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Medvedeva, T.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mizuk, R.Nakano, E.Nakao, M.Natkaniec, Z.Nishida, S.Nishimura, K.Nitoh, O.Ogawa, S.Ohshima, T.Okuno, S.Olsen, S. L.Pakhlov, P.Pakhlova, G.Palka, H.Park, C. W.Park, H.Park, H. K.Pestotnik, R.Petric, M.Piilonen, L. E.Ryu, S.Sahoo, H.Sakai, K.Sakai, Y.Schneider, O.Schwanda, C.Senyo, K.Shapkin, M.Shen, C. P.Shiu, J. -G.Shwartz, B.Singh, J. B.Smerkol, P.Sokolov, A.Solovieva, E.Staric, M.Sumiyoshi, T.Teramoto, Y.Tikhomirov, I.Trabelsi, K.Uehara, S.Uglov, T.Unno, Y.Uno, S.Usov, Y.Varner, G.Vervink, K.Wang, C. H.Wang, P.Watanabe, Y.Wedd, R.Wicht, J.Won, E.Yabsley, B. D.Yamashita, Y.Yamauchi, M.Yuan, C. Z.Zhang, Z. P.Zhulanov, V.Zivko, T.Zupanc, A.Zyukova, O.
DOI
10.1103/PhysRevD.81.031103
발행일
2010-02
유형
Article
저널명
Physical Review D - Particles, Fields, Gravitation and Cosmology
81
3
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