Description
Chair: Malina Rosca
The unitarity condition of the Cabibbo-Kobayashi-Maskawa provides an important precision test of the Standard Model. This test requires a good control of different theoretical contributions. In our work, we discuss the short-distance corrections to the weak effective theory as well as the lattice-to-continuum matching for the semi-leptonic four-fermion operator. We compare different...
We discuss Crewther's relation for gauge-parameter dependent scheme and present an extension to this relation that includes terms codifying the running of the gauge parameter. We argue for the new form of this relation holding in a variety of renormalization schemes and with different gauge fixing terms as evidenced by fixed point data and renormalization group transformations. The Crewther...
In the era of precision phenomenology, quantum electrodynamic (QED) effects are of increasing relevance. However traditional interpolating operators used for dispersive sum rule calculations do not conserve charge. We study QED corrections to leptonic B decays in a new manifestly gauge invariant formalism paying particular attention to large collinear logarithms. Using the same techniques we...
