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29 March 2024
 
  » arxiv » 1304.0121

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Study of $e^+ e^- o pi^+ pi^- J/psi$ and Observation of a Charged Charmonium-like State at Belle
Belle Collaboration ; Z. Q. Liu ; C. P. Shen ; C. Z. Yuan ; I. Adachi ; H. Aihara ; D. M. Asner ; V. Aulchenko ; T. Aushev ; T. Aziz ; A. M. Bakich ; A. Bala ; K. Belous ; B. Bhuyan ; M. Bischofberger ; A. Bondar ; G. Bonvicini ; A. Bozek ; M. Bračko ; J. Brodzicka ; T. E. Browder ; P. Chang ; V. Chekelian ; A. Chen ; P. Chen ; B. G. Cheon ; R. Chistov ; K. Cho ; V. Chobanova ; S.-K. Choi ; Y. Choi ; D. Cinabro ; J. Dalseno ; M. Danilov ; Z. Doležal ; Z. Drásal ; A. Drutskoy ; D. Dutta ; K. Dutta ; S. Eidelman ; D. Epifanov ; H. Farhat ; J. E. Fast ; M. Feindt ; T. Ferber ; A. Frey ; V. Gaur ; N. Gabyshev ; S. Ganguly ; R. Gillard ; Y. M. Goh ; B. Golob ; J. Haba ; K. Hayasaka ; H. Hayashii ; Y. Horii ; Y. Hoshi ; W.-S. Hou ; Y. B. Hsiung ; H. J. Hyun ; T. Iijima ; K. Inami ; A. Ishikawa ; R. Itoh ; Y. Iwasaki ; D. Joffe ; T. Julius ; D. H. Kah ; J. H. Kang ; T. Kawasaki ; C. Kiesling ; H. J. Kim ; J. B. Kim ; J. H. Kim ; K. T. Kim ; M. J. Kim ; Y. J. Kim ; K. Kinoshita ; J. Klucar ; B. R. Ko ; P. Kodyš ; S. Korpar ; P. Križan ; P. Krokovny ; T. Kuhr ; Y.-J. Kwon ; J. S. Lange ; S.-H. Lee ; J. Li ; Y. Li ; J. Libby ; C. Liu ; P. Lukin ; D. Matvienko ; K. Miyabayashi ; H. Miyata ; R. Mizuk ; G. B. Mohanty ; A. Moll ; R. Mussa ; E. Nakano ; M. Nakao ; Z. Natkaniec ; M. Nayak ; E. Nedelkovska ; N. K. Nisar ; S. Nishida ; O. Nitoh ; S. Ogawa ; S. Okuno ; S. L. Olsen ; Y. Onuki ; W. Ostrowicz ; C. Oswald ; P. Pakhlov ; G. Pakhlova ; H. Park ; H. K. Park ; R. Pestotnik ; M. Petrič ; L. E. Piilonen ; M. Ritter ; M. Röhrken ; A. Rostomyan ; H. Sahoo ; T. Saito ; Y. Sakai ; S. Sandilya ; D. Santel ; T. Sanuki ; Y. Sato ; V. Savinov ; O. Schneider ; G. Schnell ; C. Schwanda ; R. Seidl ; D. Semmler ; K. Senyo ; O. Seon ; M. E. Sevior ; M. Shapkin ; T.-A. Shibata ; J.-G. Shiu ; B. Shwartz ; A. Sibidanov ; F. Simon ; P. Smerkol ; Y.-S. Sohn ; A. Sokolov ; E. Solovieva ; M. Starič ; M. Steder ; M. Sumihama ; T. Sumiyoshi ; U. Tamponi ; K. Tanida ; G. Tatishvili ; Y. Teramoto ; K. Trabelsi ; T. Tsuboyama ; M. Uchida ; S. Uehara ; T. Uglov ; Y. Unno ; S. Uno ; C. Van Hulse ; P. Vanhoefer ; G. Varner ; K. E. Varvell ; V. Vorobyev ; M. N. Wagner ; C. H. Wang ; M.-Z. Wang ; P. Wang ; X. L. Wang ; M. Watanabe ; Y. Watanabe ; E. Won ; B. D. Yabsley ; J. Yamaoka ; Y. Yamashita ; S. Yashchenko ; Y. Yook ; Y. Yusa ; C. C. Zhang ; Z. P. Zhang ; V. Zhilich ; A. Zupanc ;
Date 30 Mar 2013
AbstractThe cross section for $e^+ e^- o pi^+ pi^- J/psi$ between 3.8 GeV and 5.5 GeV is measured with a 967 fb$^{-1}$ data sample collected by the Belle detector at or near the $Upsilon(nS)$ ($n = 1, 2, ..., 5$) resonances. The Y(4260) state is observed, and its resonance parameters are determined. In addition, an excess of $pi^+ pi^- J/psi$ production around 4 GeV is observed. This feature can be described by a Breit-Wigner parameterization with properties that are consistent with the Y(4008) state that was previously reported by Belle. In a study of $Y(4260) o pi^+ pi^- J/psi$ decays, a structure is observed in the $M(pi^pmjpsi)$ mass spectrum with $5.2sigma$ significance, with mass $M=(3894.5pm 6.6pm 4.5) { m MeV}/c^2$ and width $Gamma=(63pm 24pm 26)$ MeV/$c^{2}$, where the errors are statistical and systematic, respectively. This structure can be interpreted as a new charged charmonium-like state.
Source arXiv, 1304.0121
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