bb vertex resolution in dAu run

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Hello.  Still continuing a vertex resolution, I finished slewing for 
beam-beam counter (only check run 8404).  As you may already know, some 
people (DB and FV) indicated the bb gains has been changed by some 
reasons.  This means the slewing characteristics is also changed.  If 
you use the current brat, you will get a vertex resolution of about 3 cm 
using a old AuAu(?) slewing. (It is shown in 
http://pii3.brahms.bnl.gov/~hito/bb/dAu_Run/bbvertex_resolution_auauslew.gif 
) That is a lot worse than the one in AuAu run (0.85cm by Big tubes or 
1.5 by small tubes).  (Note: AuAu run had a lot more tubes that are hit 
per event, which helps vertex resolution.)
    Doing a new slwing for dAu run, the resolution has been improved to 
1.6cm (shown in 
http://pii3.brahms.bnl.gov/~hito/bb/dAu_Run/bbvertex_resolution1.gif )  
(I think we could do a little bit better after looking at slewing fits.)

Hiro

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