We have studied the production of B hadrons in 1.8-TeV p anti-p
collisions. We present measurements of the fragmentation fractions, f_u, f_d,
and f_baryon, of produced b quarks that yield B+, B0, B0(s) and
Delta-bar0_b hadrons. Reconstruction of several electron-charm final states
yields f_s/(f_u + f_d) = 0.213 +/- 0.068 and f_baryon/(f_u + f_d) = 0.118 +/-
0.042, assuming f_u = f_d. If all B hadrons produced in p anti-p collisions
cascade to one of these four hadrons, we determine f_u = f_d = 0.375 +/-
0.023, f_s = 0.160 +/- 0.044 and f_baryon = 0.090 +/- 0.029. If we do not
assume f_u = f_d, we find f_d/f_u = 0.84 +/- 0.16.
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Updated: Friday, 2000 February 25 11:15:30 CST automatically from input from CAROL@FNALD.FNAL.GOV