Observation of a resonancelike structure in the pi(+-)psi ' mass distribution in exclusive B -> K pi(+-)psi ' decays

  • Choi, S. -K.
  • Olsen, S. L.
  • Adachi, I.
  • Aihara, H.
  • Aulchenko, V.
  • ... Cheon, Byung Gu
  • 외 134명
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초록

A distinct peak is observed in the pi(+/-)psi' invariant mass distribution near 4.43 GeV in B -> K pi(+/-)psi' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433 +/- 4(stat)+/- 2(syst) MeV and Gamma=45(-13)(+18)(stat)(-13)(+30)(syst) MeV. The product branching fraction is determined to be B(B(0)-> K(-/+)Z(+/-)(4430))xB(Z(+/-)(4430)->pi(+/-)psi')=(4.1 +/- 1.0(stat)+/- 1.4(syst))x10(-5), where Z(+/-)(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5 sigma. These results are obtained from a 605 fb(-1) data sample that contains 657x10(6) B (B) over bar pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider.

키워드

CHARMONIUMANNIHILATIONX(3872)MESONSSTATESBELLEQCD
제목
Observation of a resonancelike structure in the pi(+-)psi ' mass distribution in exclusive B -> K pi(+-)psi ' decays
저자
Choi, S. -K.Olsen, S. L.Adachi, I.Aihara, H.Aulchenko, V.Aushev, T.Aziz, T.Bakich, A. M.Balagura, V.Bedny, I.Bitenc, U.Bondar, A.Bozek, A.Bracko, M.Brodzicka, J.Browder, T. E.Chang, P.Chao, Y.Chen, A.Chen, K. -F.Chen, W. T.Cheon, Byung GuChistov, R.Choi, Y.Dalseno, J.Danilov, M.Dash, M.Eidelman, S.Gabyshev, N.Golob, B.Haba, J.Hara, T.Hayasaka, K.Hayashii, H.Hazumi, M.Heffernan, D.Hoshi, Y.Hou, W. -S.Hyun, H. J.Iijima, T.Inami, K.Ishikawa, A.Ishino, H.Itoh, R.Iwasaki, M.Iwasaki, Y.Kah, D. H.Kang, J. H.Katayama, N.Kawai, H.Kawasaki, T.Kichimi, H.Kim, H. O.Kim, S. K.Kim, Y. J.Kinoshita, K.Krizan, P.Krokovny, P.Kumar, R.Kuo, C. C.Kuzmin, A.Kwon, Y. -J.Lange, J. S.Lee, J. S.Lee, M. J.Lee, S. E.Lesiak, T.Limosani, A.Lin, S. -W.Liu, Y.Liventsev, D.Mandl, F.Matyja, A.McOnie, S.Medvedeva, T.Mitaroff, W.Miyabayashi, K.Miyake, H.Miyata, H.Miyazaki, Y.Mizuk, R.Moloney, G. R.Nakano, E.Nakao, M.Nishida, S.Nitoh, O.Nozaki, T.Ogawa, S.Ohshima, T.Okuno, S.Ozaki, H.Pakhlov, P.Pakhlova, G.Park, C. W.Park, H.Peak, L. S.Pestotnik, R.Piilonen, L. E.Sahoo, H.Sakai, Y.Schneider, O.Schwartz, A. J.Senyo, K.Shapkin, M.Shen, C. P.Shibuya, H.Shwartz, B.Singh, J. B.Somov, A.Stanic, S.Staric, M.Sumiyoshi, T.Suzuki, S. Y.Takasaki, F.Tamai, K.Tanaka, M.Teramoto, Y.Tikhomirov, I.Uehara, S.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Varner, G.Vervink, K.Villa, S.Wang, C. H.Wang, M. -Z.Wang, P.Wang, X. L.Watanabe, Y.Wedd, R.Won, E.Yabsley, B. D.Yamashita, Y.Yuan, C. Z.Zhang, Z. P.Zhulanov, V.Zupanc, A.Zyukova, O.
DOI
10.1103/PhysRevLett.100.142001
발행일
2008-04
유형
Article
저널명
Physical Review Letters
100
14
페이지
1 ~ 6

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