The role of Vcb in the global picture: impact of the Vcb puzzle on UT and NP searches
Review recent measurements with focus on current limitations: are we already systematically limited? how to circumvent this? Is there a Vcb dependence on parametrisation (recent measurements do not indicate so)? Dependence on truncation on BGL expansion, how to choose (eg. nested hypothesis tests)? New ideas, eg down-feed D* in D categories to measure the w spectrum
Which measurements can we provide to improve knowledge on form factors? What are the shortcomings of unfolded distributions? What can we provide beyond/along-with them? What can angular analyses add?
What are the tension: review/comparison of recent calculations by Fermilab/MILC,HPQCD,JLQCD. What are the key differences among the 3 calculations and possible origin of the tension? What's needed to identify the origin of the tension: what short-term future results/calculations are planned?
What is the current knowledge of D(*)(n)pi l nu decays? What do we do to fill the gap? Are our assumptions and uncertainties (not only for Vcb) reliable? Can we do better and what recent measurements brought?
Can hadronic B decays (eg. B->D*eta pi) supplement info on SL-gap modes? Under which assumptions/limitations? Would like to stimulate a discussion on what measurements are possible and pressing on Bhad
This talk will explore the successful endeavors of the BES-III experiment in simulating the decay processes of charmed mesons. Advanced decay models for multibody charm decays based on dedicated partial wave amplitude measurements will be introduced.
To overcome the current used value affected by large isospin-breaking uncertainty, and to account for any c.m.-energy dependence
The slow-pion efficiency and its associated systematic uncertainty is currently the major limitation of the exclusive measurement with B->D*(D0 pi_s) l nu decays. Can we improve the slow-pion efficiency? Can we reduce its systematic uncertainty?
A key ingredient of SL measurements are LID efficiencies, their corrections and systematic uncertainties. The talk review on this topic with particular focus on current limitations and modelling of LID uncertainty correlations.
Review of Belle/Belle II most recent measurements (q2 moments). Measurement of BR(B->Xc l nu) and other going/planned activities on Belle II: Mx, El moments from previous measurements can be updated using Belle II data; angular moments measurement is ongoing. Status, issues and needs for a new determination of the inclusive measurements (e.g. w/ q2 thresholds, approach for handling syst.).
Recent Belle result (first BRs ratio measurement from inclusive decays) and prospects for the decay-width-ratio calculation (a part of th. error can be cancelled in ratio)
Lattice calculation of relevant form factors and future prospects
Status (only Mx and El moments used), pros/cons of leptonic and hadronic moments. Would a global analysis ever be possible (and useful)? Guidance towards a global analysis -> fit OPE parameters, quark masses, BR
Discuss any recent ore foreseen developments and needs from analyst (can also collect inputs in advance from Belle 2 people if needed)
Prospecst for Vcb and what we would like to have in 3 years (possibly taking also inputs from the discussion during the workshop)
