Ciao Antonio,

thanks for your posting! I think we are starting to understand what is going on...
I notice from your table that Run1-2 and Run3 are very compatible for what 
concerns both N_u and N_sl yields. The same is true for Run4 and Run5. Well, there 
is a difference between these two big run periods, as Tina recently pointed out to 
me: trickle injection. I think that signal/noise ratio can go significantly down 
because of the higher level of background caused by trickle injection - I believe 
that this was discussed in the DQG a few years back and drops in tagging 
efficiency have been reported. Do we have a measurement of our Breco efficiency 
for Run4 and Run5? I believe we still rely on measurements made on Run1-2...

All the best,

Roberto

PS: the bug you uncovered affects the output I used to prepare the table I posted 
yesterday, am I right?

Antonio Petrella wrote:
> Hi all,
> 
> discussing yesteday's post, Roberto noticed that the fit was not 
> sensible to mm2 cut, since varying the upper limit on mm2, the results 
> were identical.
> I have investigated this today and discovered a small bug in VVF.
> 
> The behavior was that even if we didn't specify to cut on Emiss-Pmiss 
> instead of mm2 in the definition of All Cut selection (this is possible 
> using -empm flag in subVirFit.pl), the variable Emiss-Pmiss was actually 
> picked up to make the All Cut selection.
> 
> I have fixed this and submitted jobs for the three analyses (cut on mm2).
> 
> As VVF jobs complete I update tables posted in 
> http://www.slac.stanford.edu/~petrella/datafit/data.html
> (old results are still available at 
> http://www.slac.stanford.edu/~petrella/datafit/data_empm.html)
> 
> So far only mx analysis has completed.
> 
> There are encouraging changes since the BRBR values are not so spread, 
> ranging now from 0.0209 for Run 4 to 0.0298 for run 3, where we had 
> 0.0114 for Run 4 up to 0.0333 for Run1-2.
> 
> Looking at the final mx fit plot, I can see that the vub/vcb ratios in 
> the signal region (Mx<1.55) change too:
> 
> Run1-2 (mm2) ~1   Run1-2 (emiss-pmiss) ~ 0.83
> Run3 (mm2) ~ 1.3  Run3 (emiss-pmiss) ~ 0.5
> Run4 (mm2) ~ 0.9  Run4 (emiss-pmiss) ~ 0.25
> Run5 (mm2) ~ 0.9  Run5 (emiss-pmiss) ~ 0.45
> 
> ciao,
>  Antonio