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Evidence for the eta_b(2S) and observation of h_b(1P) -> eta_b(1S) gamma and h_b(2P) -> eta_b(1S) gamma

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arxiv 1205.6351 v2 pith:TL2CSYUY submitted 2012-05-29 hep-ex

Belle Collaboration: R. Mizuk , D. M. Asner , A. Bondar , T. K. Pedlar , I. Adachi , H. Aihara , K. Arinstein , V. Aulchenko
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T. Aushev T. Aziz A. M. Bakich A. Bay K. Belous V. Bhardwaj B. Bhuyan M. Bischofberger G. Bonvicini A. Bozek M. Bračko T. E. Browder V. Chekelian A. Chen P. Chen B. G. Cheon K. Chilikin R. Chistov I. -S. Cho K. Cho S. -K. Choi Y. Choi J. Dalseno M. Danilov Z. Doležal Z. Drásal A. Drutskoy S. Eidelman D. Epifanov J. E. Fast V. Gaur N. Gabyshev A. Garmash B. Golob J. Haba T. Hara K. Hayasaka H. Hayashii Y. Horii Y. Hoshi W. -S. Hou Y. B. Hsiung H. J. Hyun T. Iijima A. Ishikawa R. Itoh M. Iwabuchi Y. Iwasaki T. Iwashita I. Jaegle T. Julius J. H. Kang P. Kapusta T. Kawasaki H. J. Kim H. O. Kim J. H. Kim K. T. Kim M. J. Kim Y. J. Kim K. Kinoshita B. R. Ko S. Koblitz P. Kodyš S. Korpar R. T. Kouzes P. Križan P. Krokovny T. Kuhr T. Kumita A. Kuzmin Y. -J. Kwon J. S. Lange S. -H. Lee J. Li J. Libby C. Liu Y. Liu Z. Q. Liu D. Liventsev R. Louvot D. Matvienko S. McOnie K. Miyabayashi H. Miyata G. B. Mohanty D. Mohapatra A. Moll N. Muramatsu R. Mussa M. Nakao Z. Natkaniec C. Ng S. Nishida K. Nishimura O. Nitoh T. Nozaki T. Ohshima S. Okuno S. L. Olsen Y. Onuki P. Pakhlov G. Pakhlova C. W. Park H. Park R. Pestotnik M. Petrič L. E. Piilonen A. Poluektov M. Röhrken Y. Sakai S. Sandilya D. Santel T. Sanuki Y. Sato O. Schneider C. Schwanda K. Senyo O. Seon M. E. Sevior M. Shapkin C. P. Shen 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. Sumihama T. Sumiyoshi K. Tanida G. Tatishvili Y. Teramoto I. Tikhomirov K. Trabelsi T. Tsuboyama M. Uchida S. Uehara T. Uglov Y. Unno S. Uno P. Vanhoefer G. Varner K. E. Varvell A. Vinokurova V. Vorobyev C. H. Wang M. -Z. Wang P. Wang X. L. Wang M. Watanabe Y. Watanabe K. M. Williams E. Won B. D. Yabsley J. Yamaoka Y. Yamashita C. Z. Yuan Z. P. Zhang V. Zhilich
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keywords gammaetabevidencefirstmassobservationasymmetric-energybelle
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We report the first evidence for the eta_b(2S) using the h_b(2P)->eta_b(2S)gamma transition and the first observation of the h_b(1P)->eta_b(1S)gamma and h_b(2P)->eta_b(1S)gamma transitions. The mass and width of the eta_b(1S) and eta_b(2S) are measured to be m_etab(1S)=(9402.4+-1.5+-1.8)MeV/c^2, m_etab(2S)=(9999.0+-3.5 +2.8-1.9)MeV/c^2 and Gamma_etab(1S)=(10.8 +4.0-3.7 +4.5-2.0)MeV. We also update the h_b(1P) and h_b(2P) mass measurements. We use a 133.4/fb data sample collected at energies near the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 80 citations worldwide. Full citation record

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    Using five lattice spacings with physical quark masses, the authors obtain Gamma(h_c->eta_c gamma)=0.604(24) MeV and the first lattice QCD estimate Gamma(h_b->eta_b gamma)=46.0(4.8) keV.

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