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19 April 2024

» arxiv » 1310.2704

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Measurement of branching fractions for B o J/psi eta K decays and search for a narrow resonance in the J/psi eta final state
T. Iwashita ; K. Miyabayashi ; V. Bhardwaj ; I. Adachi ; H. Aihara ; D. M. Asner ; A. M. Bakich ; A. Bala ; B. Bhuyan ; G. Bonvicini ; A. Bozek ; M. Bračko ; T. E. Browder ; M.-C. Chang ; A. Chen ; B. G. Cheon ; K. Chilikin ; R. Chistov ; K. Cho ; V. Chobanova ; S.-K. Choi ; Y. Choi ; D. Cinabro ; J. Dalseno ; M. Danilov ; Z. Doležal ; Z. Drásal ; D. Dutta ; S. Eidelman ; S. Esen ; 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 ; T. Hara ; K. Hayasaka ; H. Hayashii ; T. Higuchi ; Y. Horii ; Y. Hoshi ; W.-S. Hou ; H. J. Hyun ; T. Iijima ; A. Ishikawa ; R. Itoh ; Y. Iwasaki ; I. Jaegle ; T. Julius ; D. H. Kah ; J. H. Kang ; E. Kato ; T. Kawasaki ; H. Kichimi ; C. Kiesling ; D. Y. Kim ; H. J. Kim ; H. O. Kim ; J. B. Kim ; J. H. Kim ; M. J. Kim ; Y. J. Kim ; K. Kinoshita ; J. Klucar ; B. R. Ko ; P. Kodyš ; S. Korpar ; P. Križan ; P. Krokovny ; T. Kuhr ; T. Kumita ; A. Kuzmin ; Y.-J. Kwon ; J. S. Lange ; S.-H. Lee ; Y. Li ; J. Libby ; C. Liu ; Y. Liu ; P. Lukin ; D. Matvienko ; H. Miyata ; R. Mizuk ; A. Moll ; T. Mori ; Y. Nagasaka ; E. Nakano ; M. Nakao ; Z. Natkaniec ; M. Nayak ; C. Ng ; N. K. Nisar ; S. Nishida ; O. Nitoh ; S. Ogawa ; S. Okuno ; G. Pakhlova ; E. Panzenbock ; H. Park ; H. K. Park ; T. K. Pedlar ; R. Pestotnik ; M. Petrič ; L. E. Piilonen ; M. Ritter ; M. Rohrken ; A. Rostomyan ; S. Ryu ; H. Sahoo ; T. Saito ; K. Sakai ; Y. Sakai ; S. Sandilya ; D. Santel ; L. Santelj ; T. Sanuki ; V. Savinov ; O. Schneider ; G. Schnell ; C. Schwanda ; D. Semmler ; K. Senyo ; O. Seon ; M. E. Sevior ; M. Shapkin ; C. P. Shen ; T.-A. Shibata ; J.-G. Shiu ; B. Shwartz ; A. Sibidanov ; F. Simon ; Y.-S. Sohn ; A. Sokolov ; E. Solovieva ; S. Stanic ; M. Starič ; M. Steder ; T. Sumiyoshi ; U. Tamponi ; K. Tanida ; G. Tatishvili ; Y. Teramoto ; K. Trabelsi ; T. Tsuboyama ; M. Uchida ; S. Uehara ; Y. Unno ; S. Uno ; P. Urquijo ; P. Vanhoefer ; G. Varner ; K. E. Varvell ; V. Vorobyev ; A. Vossen ; M. N. Wagner ; C. H. Wang ; M.-Z. Wang ; P. Wang ; X. L. Wang ; M. Watanabe ; Y. Watanabe ; K. M. Williams ; E. Won ; B. D. Yabsley ; Y. Yamashita ; S. Yashchenko ; Y. Yook ; C. Z. Yuan ; Z. P. Zhang ; V. Zhilich ; A. Zupanc ;
Date:	10 Oct 2013
Abstract:	We report an observation of the $B^{pm} o J/psi eta K^{pm}$ and $B^0 o J/psi eta K^0_S$ decays using 772$ imes 10^{6}$ $Bar{B}$ pairs collected at the $Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We obtain the branching fractions ${cal B}(B^{pm} ightarrow J/psieta K^{pm})=(1.27pm 0.11{ m (stat.)pm 0.11{ m (syst.)})} imes10^{-4}$ and ${cal B}(B^0 o J/psi eta K^0_S)=(5.22 pm 0.78 { m(stat.)} pm 0.49{ m(syst.)}) imes10^{-5}$. We search for a new narrow charmonium(-like) state $X$ in the $J/psi eta$ mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, ${cal B}(B^pm o XK^pm){cal B}(X o J/psi eta)$, at 3872 MeV$/c^2$ where a $C$-odd partner of X(3872) may exist, at $psi(4040)$ and $psi(4160)$ assuming their known mass and width, and over a range from 3.8 to 4.8 GeV$/c^2$. % at a 5 MeV$/c^2$ step. The obtained upper limits at 90% confidence level for $X^{C{ m -odd}}(3872)$, $psi(4040)$ and $psi(4160)$ are 3.8$ imes 10^{-6}$, 15.5$ imes 10^{-6}$ and 8.1$ imes 10^{-6}$, respectively.
Source:	arXiv, 1310.2704
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