
Convenors:
theory
Gino Isidori (Frascati) Vittorio Lubicz (RomaIII)
exp
Edward Blucher (Chicago) Erika
de Lucia (Frascati)

The main topic is the precise determination of the Cabibbo angle through
the determination of the CKM elements V_{ud} and V_{us}

 Determination of V_{us}
 from K_{l3}: new K_{l3} results, measurement and
analysis of K_{l3} Dalitz plot to constrain CHPT parameters,
new lattice results and their errors
 from τ and hyperon decays: estimate of theoretical errors, prospects
 from f_{K}/f_{π}: new lattice results, exhaustive
estimate of unquenched lattice uncertainty
 Determination of V_{ud} from superallowed Fermi transitions,
neutron and pion decays: theoretical and experimental updates
 new ideas, for instance K^{+} → K^{0} l ν
 Determination of V_{cs}, V_{cd}


Convenors:
theory Thomas Mannel (Siegen) Shoji Hashimoto (KEK)
exp Christoph Schwanda (Vienna) Robert
Kowalewski (Victoria) 
The main goal of this group is the determination of V_{ub} and V_{cb} through the
inclusive and exclusive semileptonic B decays 
 determination of V_{cb} inclusive
 Theoretical uncertainties: prospects
 Spectral moments: new results, averages, global fits, scheme differences,
determination of quark masses and hadronic parameters and their combination.
 inclusive charm semileptonic decays: comparison with OPE prediction, D/D^{*},
duality violation, prospects
 determination of V_{ub} inclusive
 Shape function(s): combination with photon spectrum, theoretical
errors, higher dimension operators
 determination of V_{cb} exclusive: theoretical and experimental
update
 F(1) lattice unquenched calculation, LCSR
 discussion on errors
 determination of V_{ub} exclusive: theoretical and experimental update
 differential width as a function of q^{2}
 Form factors from Lattice in the region where lattice performs well.
Role of LCSR
 B→τν
 Exclusive D semileptonic decays and form factors
 D→πlν, extrapolation from D to B and possible determination
of V_{ub}


Convenors:
theory Mikolaj Misiak (Warsaw) Laurent Lellouch (Marseilles)
exp Jeffrey Berryhill (UCSB) Christoph
Paus (MIT) 
The main goal is determination of V_{td}/V_{ts} through meson mixing and rare and radiative decays

 ε_{K}, ΔM_{d}, ΔM_{s}.
 Lattice determination and experimental constraints on F_{Bd}, F_{Bs},
and ζ
 Critical review on quenching and chiral logs associated errors
 B hadron widths and differences: theoretical and experimental update
 Measurement of D_{s}/D^{+}→τ(μ)ν
 Determination of f_{Ds}, f_{D+} and their ratio
 Possible extrapolation to F_{B} and ζ
 Radiative decays as probe of CKM
 theoretical and experimental updates of B→X_{s}γ
 use of b→sγ for moments and for V_{ub} (discussion
in conjunction with WG2)
 CP asymmetry
 feasibility of B→X_{d}γ and the standard model predictions
 B→ργ and B→K^{*}γ
 Results from lattice, LCSR, prospects, long distance contributions
 Role of the radiative charm decays. Bounds?
 B→X_{s}l^{+}l^{}, theoretical and experimental
updates, FB asymmetry
 Rare K decays of relevance to CKM studies
 K→πνν, charged and neutral (theortical and experimental
updates)
 K→πll


Convenors:
theory Martin Beneke (Aachen) Yuval Grossman (Technion/Boston)
exp Andreas Hoecker (Orsay) Masashi
Hazumi (KEK) 
The main goal is to study the measurements of the angles
α (or equivalently γ) and β in charmless B decays.
The limitations and ways to overcome them will be discussed, as well as
new approaches and high statistics projections. We will
concentrate on ways to estimate the SM uncertainties in all these modes
and theoretical and experimental ways to reduce them.

 α(γ) modes: two body decays (ππ),
quasitwobody (Q2B) B decays (ρρ ρπ) and
Dalitz analyses (πππ).
 Are there any "unused'' modes?
 How can we get to α from the different measurements?
How good is the Q2B approximation? How important are Swave
contribution (and other interference) in modes involving
ρ?
 How large are isospin breaking effects? Are there
ways that these errors can be reduced?
 How trustable are theoretical calculations of the
penguin pollution?
 β modes: φK^{0}, η'K^{0}, f_{0}K^{0}, π^{0} K_{S},
K^{+}K^{}K_{S}, K_{S}K_{S}K_{0} and more.
 What are the SM prediction for the deviation from
sin 2β in all these modes? That is, what are
the methods one can use to calculate them and how
these methods can be checked?
 Are there other modes that one can use?
 Can the sign of the deviation be obtained ?
 Are there correlations between the deviation in these modes?
Are there observables or combinations of observables that
have smaller SM uncertainties (sums, ratios etc.) ?
 Interpretation of other charmless decays
 Understanding of the πK modes (γ, electroweak penguins).
 What can be learnt in addition from π K^{*} and
ρK^{*} modes?
 Polarization in B→VV modes
 Comparison and assessment of theoretical approaches based
on factorization and/or flavour symmetries
 What are the theoretical assumptions?
 Which amplitudes are included in the calculations,
and what is the estimated theoretical error?
 Perform comparative studies for "benchmark" modes.
 How predictive are datadriven fits?


Convenors:
theory Amarjit Soni (BNL) Robert Fleischer (CERN)
exp Timothy Gershon (KEK) Gianluca
Cavoto (Roma I) 
The main goal is the
measurement of the angles γ and β from B decays involving D or Charmonium
mesons. The limitations and ways to overcome them will be discussed, as well as
new approaches and high statistics projections 
 B decays to Charmonium
 measurements of β and cos2β
 CPT/T parameters
 Measurements of in B D(*)K(*) decays
 GLW and ADS methods
 Dalitz methods (model dependent/independent)
 Measurements of 2β+γ in B→D^{(*)}π,ρ
decays and related BF measurements (D_{s}π,Dπ^{0}, and D^{(*)}K^{(*)})


Convenors:
theory Luca Silvestrini (Roma I) Gudrun Hiller (Munich)
exp Heiko Lacker (Dresden) Gerhard
Raven(Nikhef) 
The main goals are global fits to the CKM parameters using different
statistical methods and the
new physics scenarios at the B factories, Tevatron, and the future
B facilities. 
 global fit to Unitarity Triangle parameters using all the experimental and theoretical inputs
from all the other WGs
 comparison between direct and indirect determinations of different quantities, for instance UT angles, hadronic parameters. Importance of
different quantities in defining the CKM parameters
 New Physics: experimentoriented review of recent theoretical ideas in
flavor physics; study of a few case scenarios (measurement of ΔM_{s}
and/or B_{s}→μ^{+}μ^{} at Tevatron,
b>s CP asymmetries at B factories,
B→πK) in the global preLHC context; supersymmetric models: can we
already draw some conclusion on the flavor structure?
