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Workshop Summary as list of questions selected by the organisers (Jochen,Paul,Tom,Achille)

Workshop Summary as list of questions selected by the organisers (Jochen,Paul,Tom,Achille). ~40 listed questions. Many thanks to the speakers :. Art Snyder, Vera Luth, Justine Serrano, Richard Hill, Paul MacKenzie, Damir Becirevic, Karsten Koeneke, Paul Jackson,

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Workshop Summary as list of questions selected by the organisers (Jochen,Paul,Tom,Achille)

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  1. Workshop Summary as list of questions selected by the organisers (Jochen,Paul,Tom,Achille) ~40 listed questions Many thanks to the speakers : Art Snyder, Vera Luth, Justine Serrano, Richard Hill, Paul MacKenzie, Damir Becirevic, Karsten Koeneke, Paul Jackson, Shoji Hashimoto, Christine Davies, Vittorio Lubicz, Denis Bernard, Estia Eichten • Many points have been raised. We have to • digest them ! • -List of questions is growing… • -Discussions will go on after the meeting and we • hope this workshop has also served for • continuing fruitful collaborations between • theorists and experimentalists Thanks to the participants and especially to theorists which come for the Workshop. List of points we put down to continue the discussion

  2. B exclusive to D : Vcb Babar has the most precise Form factor determination for D* • Useful to further improve the D* ff ? • * Is there theoretical interest on D** ? * F(1) in D* and D room from improvements (today +-3% on 10% difference from 1) ? * Useful to calculate r2 on Lattice ? Useful for experiment or just a check for Lattice ? Comments : Measurements with p,h,r available and will be improved. Possibility to split on many q2 bins B exclusive to u : Vub We want exclusive reach the same precision quoted for inclusive B u decays. * Bhln vs pln useful ? (h,h’ mixing) related question on charm sector) from experiment (background) ? (related question on charm sector) * Which is the optimal q2 region ? from Lattice ? (how to estimate the error on the extrapolation ?) * Br l n (r is not stable). Effect of the width is relevant ? B  wln * Parametrization issue (param. in terms of z) (see related question on charm) * Issue : treatement of radiative decays with PHOTOS

  3. Comment : Babar start to give extremely precise results. D semileptonic decays (Mpole, a,..d) ? Param. in terms of z ? * Pole dominance / Single pole / Modified pole * D->h l v interesting ? Dsf l v vs D K l n (same pole)….? * Dpln possible, interesting proposal of measuring Vub from the ratio with Bpln in same v.k bin. Feasible ? Precision on Vub ? Alternative way to get Vtd/Vts Comments Br(rg) @ 20% radiative decays. * Br(rg)/Br(K*g) ~ form factor ratio ~ 1.2+-0.1 can be improved ? the error is lattice dominated ? * BR(rg) can you calculate the annihiliation on Lattice ? Comments: from Babar Dslv fDs@ 10% using Br(Dsfp) Btn start to be measured Leptonic decays Get fBs/fBd Issue : better determination of BBs/BBd to get x Best way ? * from Lattice calculating directly. * measuring fDs/fD+ and using lattice double ratio calcs. (Damir) * from fp/fK (see results in Christine talk) x@(1-2%)

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