Hi,
participants: Concezio, Kerstin, Heiko
* Concezio has provided a documentation in BAD1383 (Appendix E)
He will correct it a bit since several captions do not coincide with
the quantities shown.
* We have observed that - when applying the correction factor - that
yields in the mES can become negative (since the correction factor
can become negative when fitting the correction factor as a function
of mX with e.g. a second-order polynomial)
This leads to the question if we want to constrain in general the
(signal) yields
from the mES fit being positive.
We had already a discussion at Montreal about this. I do not remember
if we decided there to allow the yields to become negative in order
to avoid a possible bias. Probably, such a bias is not an issue and
we should enforce the mES yield to be positive?
* Looking into the mES fit on the data-depleted sample which is important
input to our correction factor we observe that many fits have problem in
the region around the anchor point of the Peaking BG PDF.
I think we should consider trying to apply the mES correction and see
if the fits behave in a better way. Of course, this does not correctly
correct for the endpoint but is maybe not so important.
Besides studying higher purity cuts: Chukwudi and Wolfgang, could you
please try this? (Wolfgang did already something in this direction.)
Cheers,
Heiko
P.S.: I will leave next Saturday if there is any need for discussion.
Concezio is not any more reachable.
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