Hi Chukwudi,

yes, that is the cut I was referring to.

Effectively this cut (with the numbers as used in VirUtil) requires the
angular distance of the triue Breco and the reco'd Breco to be smaller
than 0.4, where the angular distance is defined as
d=sqrt((delta theta)^2 + (delta phi)^2)
and delta theta and delta phi are the angular differences in the azimutal
and the polar angle, respectively.

Those at the first glance funny looking numbers come from the fact that we
originally considered other variables for the matching as well (the Breco
seed and the number of daughters of the Breco) and effectively used a bit
map, but those two did not turn out to be very helpful. The cut below
selects all events with small angular distance, independent of the other
criteria. You can find some description of this in BAD 894v7 in Sect.
2.3.3.

Cheers,
Kerstin



On Tue, 7 Mar 2006, CHUKWUDI KWEKU CLARKE wrote:

> Hi Kerstin, I managed to find brecoqual by using grep and saw that there
> is some sort of cut (in VirUtil.icc) that looks like
> sprintf(unfcuts,"%s%f","lepYaSe && (brecoqualy==1||brecoqualy==5
> ||brecoqualy==7)&&allmes>5.27&&vxbtyp==-11&&elmom>",lepcut);
>
> Is this ((brecoqualy==1||brecoqualy==5||brecoqualy==7)) what you where
> talking about? And if so could you tell me what the numbers, 1, 5 and 7
> stand for?
> Cheers, C.C.
>
>