We have reconstructed the radiative decays chi(b)(1P) --> Upsilon(1S)
gamma and chi(b)(2P) --> Upsilon(1S) gamma in p anti-p collisions at s**(1/2) = 1.8
TeV, and measured the fraction of Upsilon(1S) mesons that originate from these
decays. For Upsilon(1S) mesons with pupsilon_T >gt; 8.0 GeV/c, the fractions
that come from chi(b)(1P) and chi(b)(2P) decays are (27.1 +/- 6.9(stat) +/-
4.4(sys))% and (10.5 +/- 4.4(stat) +/- 1.4(sys))%, respectively. We have
derived the fraction of directly produced Upsilon(1S) mesons to be (50.9 +/-
8.2(stat) +/- 9.0(sys))%.
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Updated: Thursday, 2000 March 30 14:11:58 CST automatically from input from CAROL@FNALD.FNAL.GOV