European Physical Journal C: Particles and Fields (2018-08-01)

Inclusive study of bottomonium production in association with an $$\eta $$ η meson in $$e^+e^-$$ e+e- annihilations near $$\varUpsilon (5S)$$ Υ(5S)

  • U. Tamponi,
  • E. Guido,
  • R. Mussa,
  • I. Adachi,
  • H. Aihara,
  • S. Al Said,
  • D. M. Asner,
  • H. Atmacan,
  • V. Aulchenko,
  • T. Aushev,
  • R. Ayad,
  • V. Babu,
  • I. Badhrees,
  • A. M. Bakich,
  • V. Bansal,
  • E. Barberio,
  • P. Behera,
  • M. Berger,
  • V. Bhardwaj,
  • B. Bhuyan,
  • J. Biswal,
  • A. Bondar,
  • A. Bozek,
  • M. Bračko,
  • T. E. Browder,
  • D. Červenkov,
  • A. Chen,
  • B. G. Cheon,
  • K. Chilikin,
  • K. Cho,
  • Y. Choi,
  • D. Cinabro,
  • S. Cunliffe,
  • T. Czank,
  • N. Dash,
  • S. Di Carlo,
  • Z. Doležal,
  • Z. Drásal,
  • S. Eidelman,
  • D. Epifanov,
  • J. E. Fast,
  • T. Ferber,
  • B. G. Fulsom,
  • R. Garg,
  • V. Gaur,
  • N. Gabyshev,
  • A. Garmash,
  • M. Gelb,
  • P. Goldenzweig,
  • J. Haba,
  • T. Hara,
  • K. Hayasaka,
  • H. Hayashii,
  • M. T. Hedges,
  • W.-S. Hou,
  • K. Inami,
  • G. Inguglia,
  • A. Ishikawa,
  • R. Itoh,
  • M. Iwasaki,
  • Y. Iwasaki,
  • I. Jaegle,
  • H. B. Jeon,
  • Y. Jin,
  • K. K. Joo,
  • T. Julius,
  • K. H. Kang,
  • T. Kawasaki,
  • H. Kichimi,
  • D. Y. Kim,
  • H. J. Kim,
  • J. B. Kim,
  • K. T. Kim,
  • S. H. Kim,
  • K. Kinoshita,
  • P. Kodyš,
  • S. Korpar,
  • D. Kotchetkov,
  • P. Križan,
  • R. Kroeger,
  • P. Krokovny,
  • R. Kulasiri,
  • Y.-J. Kwon,
  • I. S. Lee,
  • S. C. Lee,
  • L. K. Li,
  • Y. Li,
  • L. Li Gioi,
  • J. Libby,
  • D. Liventsev,
  • T. Luo,
  • M. Masuda,
  • T. Matsuda,
  • D. Matvienko,
  • M. Merola,
  • H. Miyata,
  • R. Mizuk,
  • G. B. Mohanty,
  • H. K. Moon,
  • T. Mori,
  • T. Nanut,
  • K. J. Nath,
  • Z. Natkaniec,
  • M. Nayak,
  • N. K. Nisar,
  • S. Nishida,
  • S. Okuno,
  • H. Ono,
  • Y. Onuki,
  • P. Pakhlov,
  • G. Pakhlova,
  • B. Pal,
  • H. Park,
  • S. Paul,
  • T. K. Pedlar,
  • R. Pestotnik,
  • L. E. Piilonen,
  • M. Ritter,
  • A. Rostomyan,
  • G. Russo,
  • Y. Sakai,
  • M. Salehi,
  • S. Sandilya,
  • T. Sanuki,
  • V. Savinov,
  • O. Schneider,
  • G. Schnell,
  • C. Schwanda,
  • Y. Seino,
  • K. Senyo,
  • O. Seon,
  • M. E. Sevior,
  • V. Shebalin,
  • C. P. Shen,
  • T.-A. Shibata,
  • N. Shimizu,
  • J.-G. Shiu,
  • B. Shwartz,
  • A. Sokolov,
  • E. Solovieva,
  • M. Starič,
  • J. F. Strube,
  • T. Sumiyoshi,
  • M. Takizawa,
  • K. Tanida,
  • F. Tenchini,
  • K. Trabelsi,
  • M. Uchida,
  • S. Uehara,
  • T. Uglov,
  • Y. Unno,
  • S. Uno,
  • P. Urquijo,
  • C. Van Hulse,
  • G. Varner,
  • A. Vinokurova,
  • V. Vorobyev,
  • A. Vossen,
  • B. Wang,
  • C. H. Wang,
  • M.-Z. Wang,
  • P. Wang,
  • X. L. Wang,
  • M. Watanabe,
  • Y. Watanabe,
  • E. Widmann,
  • E. Won,
  • H. Ye,
  • C. Z. Yuan,
  • Y. Yusa,
  • S. Zakharov,
  • Z. P. Zhang,
  • V. Zhilich,
  • V. Zhukova,
  • V. Zhulanov,
  • A. Zupanc

DOI
https://doi.org/10.1140/epjc/s10052-018-6086-4
Journal volume & issue
Vol. 78, no. 8
pp. 1 – 10

Abstract

Read online

Abstract We study bottomonium production in association with an $$\eta $$ η meson in $$e^+e^-$$ e+e- annihilations near the $$\varUpsilon (5S)$$ Υ(5S) , at a centre-of-mass energy of $$\sqrt{s}=10.866$$ s=10.866 GeV. The results are based on the 121.4 fb$$^{-1}$$ -1 data sample collected by the Belle experiment at the asymmetric-energy KEKB collider. Only the $$\eta $$ η meson is reconstructed and the missing-mass spectrum of $$\eta $$ η candidates is investigated. We observe the $$e^+e^-\rightarrow \eta \varUpsilon _J(1D)$$ e+e-→ηΥJ(1D) process and find evidence for the $$e^+e^-\rightarrow \eta \varUpsilon (2S)$$ e+e-→ηΥ(2S) process, while no significant signals of $$\varUpsilon (1S)$$ Υ(1S) , $$h_b(1P)$$ hb(1P) , nor $$h_b(2P)$$ hb(2P) are found. Cross sections for the studied processes are reported.