1. Introduction
---------------
All results and input files are available at 

  http://www.slac.stanford.edu/xorg/hfag/semi/pdg04/pdg04.shtml

In the  following (in  no particular order),  the updates for  PDG 2004
with respect to PDG  2003 (web update) are discussed.

As usual, most of the error breakdowns can be found in

  http://www.slac.stanford.edu/xorg/hfag/semi/pdg04/pdg04.xls
spreadsheet.



2. Changes to common parameters
-------------------------------
We use the updated input  parameters for mixing and lifetimes from the
HFAG PDG 2004 update. For more information, please see


  http://lepbosc.web.cern.ch/LEPBOSC/combined_results/combined_results/nov21b
  
and

  http://lepbosc.web.cern.ch/LEPBOSC/combined_results/nov21b/changes.txt


The changes are:

  ----------------------------------------------
  Parameter      PDG 2003          PDG 2004
  ----------------------------------------------
  
  fbd            39.0 +/-1.0      39.7 +/-1.0
  tb0            1.537+/-0.014    1.536+/-0.01
  fbs            10.1 +/-1.3      10.7 +/-1.1
  fbar           11.9 +/-2.0      9.85 +/-1.7
  dkp            3.80 +/-0.09     3.85 +/-0.09
  dkpzp          13.1 +/-0.9      13.1 +/-1.6
  dkzpp          2.96 +/-0.18     2.99 +/-0.18     
  chi            0.089+/-0.004    0.091+/-0.003 

  fbpb0          1.053+/-0.055    1.029+/-0.056    
  chi (=chid*f0) 0.091+/-0.004    0.089+/-0.004
  ----------------------------------------------

Notes:
------

fbpb0:The quoted value is based on the average by Olivier Schneider of
two results by CLEO, one by BABAR, and one by BELLE. 

chi: chi = f0*chi_d. This is based on fbpb0 as derived above. The
impact of the size of the error is on BF(B -> X l nu)
   ! s(chi)=0.003 -> 10.74
   ! s(chi)=0.001 -> 10.74
   ! s(chi)=0.009 -> 10.73


3. Delphi
---------

In a second  part, the accepted but not yet  published recent paper by
Delphi is included in the averages. These averages can be found at the
bottom of the page.


4. Conclusion
-------------

Your critical comments will be much appreciated. Please send them to