B Hadron Fragmentation Fractions

The B hadron relative fragmentation fractions have been measured using semileptonic B signals in the first 360 pb-1 of data collected with the CDF detector. The five lepton-charm signals reconstructed are lD+, lD0, lD*+, lDs, and l/\c. These are related to four B hadrons B0, B-, Bs, and /\b with a sample composition. These results have been approved at the B meeting on February 16, 2006. A full description of the analysis can be found in CDF note 8140.



                            We measure
 fu
 fd
 =  1.054 ± 0.018 (stat.)   +0.025
0.045
 (syst.) ± 0.082 (BR)
 fs
 fu + fd
 =  0.160 ± 0.005 (stat.)   +0.011
0.010
 (syst.) +0.057
0.034
 (BR)
 f/\b
 fu + fd
 =  0.281 ± 0.012 (stat.)   +0.058
0.056
 (syst.)  +0.128
0.086
 (BR)

                            Poorly measured branching ratios can be factored out of the result, giving
 
 fs    
 fu + f
  BR(Ds->phi pi)  =  (5.76 ± 0.18 (stat.)  +0.45
0.42
 (syst.)) 10-3
 f/\b    
fu + fd 
  BR(/\c->pKpi)  =  (14.1 0.6  (stat.) +5.3
4.4
 (syst.)) 10-3 
 f/\b
 fu + fd
  BR(/\b-> lnu/\cX)   BR(/\c->pKpi)  =  (12.9 ± 0.6  (stat.)  ± 3.4  (syst.)) 10-4 

















The eps versions of all figures blessed in conjunction with this analysis are here:

The eps versions of tables blessed in conjunction with this analysis are here:

Additionally, the number of Ds-> KKpi reflection events in the window [1.78, 1.95], which lie beneath in the D+ signal are calculated to be:

These numbers are determined by measuring the Ds-> KKpi signal which lies within the D+ signal region and scaling it by Monte Carlo predictions:

where

is determined from Monte Carlo. We find

Figures related to the Ds reflection in the D+ signal are here: