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29 March 2024
 
  » arxiv » 1305.5887

 Article overview


Measurement of exclusive $Upsilon(1S)$ and $Upsilon(2S)$ decays into Vector-Pseudoscalar final states
Belle Collaboration ; C. P. Shen ; C. Z. Yuan ; I. Adachi ; H. Aihara ; D. M. Asner ; V. Aulchenko ; A. M. Bakich ; A. Bala ; B. Bhuyan ; M. Bischofberger ; A. Bozek ; M. Bračko ; T. E. Browder ; V. Chekelian ; A. Chen ; P. Chen ; B. G. Cheon ; K. Chilikin ; I.-S. Cho ; K. Cho ; V. Chobanova ; Y. Choi ; D. Cinabro ; J. Dalseno ; M. Danilov ; J. Dingfelder ; Z. Doležal ; Z. Drásal ; A. Drutskoy ; D. Dutta ; K. Dutta ; S. Eidelman ; D. Epifanov ; H. Farhat ; J. E. Fast ; 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 ; Y. Hoshi ; W.-S. Hou ; H. J. Hyun ; T. Iijima ; A. Ishikawa ; R. Itoh ; Y. Iwasaki ; T. Julius ; D. H. Kah ; J. H. Kang ; E. Kato ; T. Kawasaki ; C. Kiesling ; D. Y. Kim ; H. J. Kim ; J. B. Kim ; J. H. Kim ; K. T. Kim ; Y. J. Kim ; K. Kinoshita ; J. Klucar ; B. R. Ko ; P. Kodyš ; S. Korpar ; P. Križan ; P. Krokovny ; T. Kumita ; A. Kuzmin ; Y.-J. Kwon ; S.-H. Lee ; R. Leitner ; J. Li ; Y. Li ; J. Libby ; C. Liu ; Y. Liu ; Z. Q. Liu ; D. Liventsev ; P. Lukin ; D. Matvienko ; K. Miyabayashi ; H. Miyata ; G. B. Mohanty ; A. Moll ; T. Mori ; N. Muramatsu ; R. Mussa ; Y. Nagasaka ; E. Nakano ; M. Nakao ; Z. Natkaniec ; M. Nayak ; E. Nedelkovska ; C. Ng ; N. K. Nisar ; S. Nishida ; O. Nitoh ; S. Ogawa ; S. Okuno ; S. L. Olsen ; W. Ostrowicz ; P. Pakhlov ; C. W. Park ; H. Park ; H. K. Park ; T. K. Pedlar ; T. Peng ; R. Pestotnik ; M. Petrič ; L. E. Piilonen ; M. Ritter ; M. Röhrken ; A. Rostomyan ; S. Ryu ; H. Sahoo ; T. Saito ; Y. Sakai ; S. Sandilya ; L. Santelj ; T. Sanuki ; Y. Sato ; V. Savinov ; O. Schneider ; G. Schnell ; C. Schwanda ; K. Senyo ; O. Seon ; M. Shapkin ; V. Shebalin ; T.-A. Shibata ; J.-G. Shiu ; B. Shwartz ; A. Sibidanov ; F. Simon ; P. Smerkol ; Y.-S. Sohn ; A. Sokolov ; E. Solovieva ; S. Stanič ; M. Starič ; M. Steder ; M. Sumihama ; T. Sumiyoshi ; U. Tamponi ; K. Tanida ; G. Tatishvili ; Y. Teramoto ; T. Tsuboyama ; M. Uchida ; S. Uehara ; Y. Unno ; S. Uno ; P. Urquijo ; C. Van Hulse ; P. Vanhoefer ; G. Varner ; V. Vorobyev ; M. N. Wagner ; C. H. Wang ; P. Wang ; X. L. Wang ; M. Watanabe ; Y. Watanabe ; E. Won ; H. Yamamoto ; J. Yamaoka ; Y. Yamashita ; S. Yashchenko ; Y. Yook ; Y. Yusa ; C. C. Zhang ; Z. P. Zhang ; A. Zupanc ;
Date 25 May 2013
AbstractUsing samples of 102 million $Upsilon(1S)$ and 158 million $Upsilon(2S)$ events collected with the Belle detector, we study exclusive hadronic decays of these two bottomonium resonances to $ks K^+ pi^-$ and charge-conjugate (c.c.) states, $pi^+ pi^- pi^0 pi^0$, and $pi^+ pi^- pi^0$, and to the two-body Vector-Pseudoscalar ($K^{ast}(892)^0ar{K}^0+ { m c.c.}$, $K^{ast}(892)^-K^+ + { m c.c.}$, $omegapi^0$, and $ hopi$) final states. For the first time, signals are observed in the modes $Upsilon(1S) o ks K^+ pi^- + { m c.c.}$, $pi^+ pi^- pi^0 pi^0$, and $Upsilon(2S) o pi^+ pi^- pi^0 pi^0$, and evidence is found for the modes $Upsilon(1S) o pi^+ pi^- pi^0$, $K^{ast}(892)^0 ar{K}^0+ { m c.c.}$, and $Upsilon(2S) o ks K^+ pi^- + { m c.c.}$ Branching fractions are measured for all the processes, while 90% confidence level upper limits on the branching fractions are also set for the modes with a statistical significance of less than $3sigma$. The ratios of the branching fractions of $Upsilon(2S)$ and $Upsilon(1S)$ decays into the same final state are used to test a perturbative QCD prediction for OZI-suppressed bottomonium decays.
Source arXiv, 1305.5887
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