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. GaltieriV. 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

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116 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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