Evidence for a New Resonance and Search for the Y(4140) in the gamma gamma -> phi J/psi Process

  • Shen, C. P.
  • Yuan, C. Z.
  • Aihara, H.
  • Arinstein, K.
  • Aushev, T.
  • ... Cheon, B. G.
  • 외 128명
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163

초록

The process gamma gamma -> phi J/psi is measured using a data sample of 825 fb(-1) collected with the Belle detector. A narrow peak of 8:8(-3.2)(+4.2) events, with a significance of 3.2 standard deviations including systematic uncertainty, is observed. The mass and natural width of the structure [named X(4350)] are measured to be [4350.6(-5.1)(+4.6)(stat) +/- 0.7(syst)] MeV/c(2) and [13(-9)(+18)(stat) +/- 4(syst)] MeV, respectively. The product of its two-photon decay width and branching fraction to phi J/psi is 6.7(-2.4)(+3.2) (stat) +/- 1.1(syst)] eV for J(P) = 0(+), or [1.5(-0.6)(+0.7) (stat) +/- 0.3 (syst)]eV for J(P) = 2(+). No signal for the Y(4140) ->phi J/psi structure reported by the CDF Collaboration in B -> K+ phi J/psi decays is observed, and limits of Gamma(gamma gamma) (Y(4140))B(Y(4140) -> phi J/psi) < 41 eV for J(P) = 0(+) or <6.0 eV for J(P) = 2(+) are determined at the 90% C. L. This disfavors the scenario in which the Y(4140) is a D-s*D-+(s)*(-) molecule.

키워드

BELLEIDENTIFICATIONMESONSKEKB
제목
Evidence for a New Resonance and Search for the Y(4140) in the gamma gamma -> phi J/psi Process
저자
Shen, C. P.Yuan, C. Z.Aihara, H.Arinstein, K.Aushev, T.Bakich, A. M.Balagura, V.Barberio, E.Bay, A.Belous, K.Bhardwaj, V.Bischofberger, M.Bracko, M.Browder, T. E.Chang, M. -C.Chang, P.Chen, A.Chen, P.Cheon, B. G.Chiang, C. -C.Cho, I. -S.Choi, Y.Dalseno, J.Das, A.Dolezal, Z.Drutskoy, A.Eidelman, S.Epifanov, D.Gabyshev, N.Golob, B.Ha, H.Haba, J.Han, B. -Y.Hayasaka, K.Hayashii, H.Horii, Y.Hoshi, Y.Hou, W. -S.Hsiung, Y. B.Hyun, H. J.Inami, K.Itoh, R.Iwabuchi, M.Iwasaki, M.Iwasaki, Y.Joshi, N. J.Julius, T.Kang, J. H.Kawasaki, T.Kiesling, C.Kim, H. J.Kim, H. O.Kim, J. H.Kim, S. K.Kim, Y. I.Kim, Y. J.Ko, B. R.Kodys, P.Korpar, S.Kreps, M.Krizan, P.Krokovny, P.Kuhr, T.Kwon, Y. -J.Kyeong, S. -H.Lange, J. S.Lee, M. J.Lee, S. -H.Li, J.Liu, C.Liu, Y.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mori, T.Mussa, R.Nakano, E.Nakao, M.Nakazawa, H.Natkaniec, Z.Neubauer, S.Nishida, S.Nishimura, K.Nitoh, O.Ohshima, T.Okuno, S.Olsen, S. L.Pakhlova, G.Park, C. W.Park, H.Park, H. K.Pestotnik, R.Petric, M.Piilonen, L. E.Roehrken, M.Ryu, S.Sahoo, H.Sakai, Y.Schneider, O.Senyo, K.Sevior, M. E.Shapkin, M.Shiu, J. -G.Shwartz, B.Singh, J. B.Smerkol, P.Sokolov, A.Solovieva, E.Staric, M.Teramoto, Y.Trabelsi, K.Uehara, S.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Varner, G.Vervink, K.Wang, C. H.Wang, P.Wang, X. L.Watanabe, Y.Wedd, R.Won, E.Yabsley, B. D.Yamashita, Y.Zhang, C. C.Zhang, Z. P.Zivko, T.Zyukova, O.
DOI
10.1103/PhysRevLett.104.112004
발행일
2010-03
유형
Article
저널명
Physical Review Letters
104
11
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