List of Questions
Experiment
1. Which is the largest experimental phase-space
region that can be achieved for the different analyses by the end of
data-taking? For SF theory: above what point in Ee or below what point in Mx does
the partial rate calculation become essentially SF independent (say
where SF errors are well below 1%)? 10
2. Would be helpful
to provide values of the partial branching fraction for different sets
of cuts? (e.g. like in the endpoint analysis). For which analyses?
3. Can the partial branching fractions be presented in
the B rest frame (instead of the Y(4S) rest frame) for the end point
analyses and would it be useful for theorists?
4. Can an unfolded spectrum be available for all the
distributions? Would is be useful for the theorists if unfolded spectra were made available?
5. Given a dataset (e.g. Breco), several
kinematical distributions are looked at in more than a kinematical
variable and accordingly different values of
Vub are given. Should we choose among them? Eg the one with the
smallest experimental
error when quoting the final results?
Theory - present
6. Are there independent checks of the theory calculations? Eg. other measurements?
7. Is the current theoretical error estimation in
the experimental papers and HFAG, fitting tools (eg CKMfitter, UTFit,
etc) etc. correctly performed?
8. b-quark mass: what to use? how can it be
translated to your scheme, if needed? Which are the corresponding
uncertainties of using predicted moments in the translation (as HFAG
currently does)? Should instead an analytical transformation
be used and does it have the same properties?
9. Breco-based analyses: what errors should be
assigned to the ratios of calculated rates? Eg.
DeltaGamma(P+<0.66) / DeltaGamma(Mx<1.7,q2>8)? Do you
agree in using the ratio of rates as less dependent on mb? (checked
on SF and DGE theories)
Theory - future
10. What improvements are foreseen in the calculations in
the next couple of years? How would they affect the current
errors? Which uncertainties do we not know how to reduce?
11. How can we estimate the Weak Annihilation error in an improved way?
12. What's your opinion on the q^2 cut (in both directions) and
can one learn something about weak annihilation unambiguously
from a q^2 spectrum?
13. How much is the uncertainty on the gluon
splitting? How can we measure the gluon splitting experimentally?
14. Quark-hadron duality: how can we probe its region of
validity? How should we treat the regions (e.g. at low hadron mass in
b->sg or b->ulnu) where it clearly breaks down? How would you
assign an uncertainty? What can we do to improved our MC simulation?
15. How do different theoretical approaches fit into each other?
How should we interpret theoretical errors of different
approaches? Which approaches should we use? i.e. can we devise a
criteria to choose among them? (to be continued on Sunday if needed)