Production of ϒ(1S) mesons from χb decays in p¯p collisions at √s=1.8TeV

  • T. Affolder
  • , H. Akimoto
  • , A. Akopian
  • , M. G. Albrow
  • , P. Amaral
  • , S. R. Amendolia
  • , D. Amidei
  • , J. Antos
  • , G. Apollinari
  • , T. Arisawa
  • , T. Asakawa
  • , W. Ashmanskas
  • , M. Atac
  • , F. Azfar
  • , Azzi P. Bacchetta
  • , N. Bacchetta
  • , M. W. Bailey
  • , S. Bailey
  • , P. De Barbaro
  • , Barbaro A. Galtieri
  • V. E. Barnes, B. A. Barnett, M. Barone, G. Bauer, F. Bedeschi, S. Belforte, G. Bellettini, J. Bellinger, D. Benjamin, J. Bensinger, A. Beretvas, J. P. Berge, J. Berryhill, S. Bertolucci, B. Bevensee, A. Bhatti, C. Bigongiari, M. Binkley, D. Bisello, R. E. Blair, C. Blocker, K. Bloom, B. Blumenfeld, B. S. Blusk, A. Bocci, A. Bodek, W. Bokhari, G. Bolla, Y. Bonushkin, D. Cronin-Hennessy, CDF Collaboration

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

We have reconstructed the radiative decays χb(1P)→ ϒ(1S)ϒ and χb(2p)→ ϒ(1S)ϒ in p¯p collisions at v√s=1.8TeV, and measured the fraction of ϒ(1S) mesons that originate from these decays. For ϒ(1S) mesons with pϒ T>8.0GeV/c, the fractions that come from χb(1P) and χb(2P) decays are [27.1±6.9(stat)±4.4(syst)]% and [10.5±4.4(stat)±1.4(syst)]%, respectively. We have derived the fraction of directly produced ?(1S) mesons to be [50.9±8.2(stat)±9.0(syst)]%.

Original languageEnglish (US)
Pages (from-to)2094-2099
Number of pages6
JournalPhysical review letters
Volume84
Issue number10
DOIs
StatePublished - 2000

Bibliographical note

Funding Information:
We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Science and Culture of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; and the A. P. Sloan Foundation.

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