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)