Th. Feldmann

Mixing and Decay Constants of Pseudoscalar Mesons

We propose a new eta-eta mixing scheme where we start from the quark flavor basis and assume that the decay constants in that basis follow the pattern of particle state mixing. On exploiting the divergences of the axial vector currents - which embody the axial vector anomaly - all basic parameters are fixed to first order of flavor symmetry breaking. That approach naturally leads to a mass matrix, quadratic in the masses, with specified elements. We also test our mixing scheme against experiment and determine corrections to the first order values of the basic parameters from phenomenology. Finally, we generalize the mixing scheme to include the eta(c). Again the divergences of the axial vector currents fix the mass matrix and, hence, mixing angles and the charm content of the eta and eta.

Exclusive radiative and electroweak

Abstract.We provide standard model expectations for the rare radiative decays

b \to d

Bto K^*gamma

and

,

b \to s

Bto rhogamma

penguin decays at NLO

and

Linking parton distributions to form-factors and Compton scattering

Btoomegagamma

Skewed parton distributions for

, and the electroweak penguin decays

B\to \pi

Bto K^*ell^ + ell^-

transitions

and