Speaker
Gregorio Herdoiza
(IFT UAM-CSIC)
Description
The electromagnetic coupling receives significant contributions to its
running from non-perturbative QCD effects. We present an update of our
study of the Adler function and of its application to the
determination of leading order hadronic contribution to the running of
the QED coupling. We use a high-statistics lattice QCD computation
with two flavours of O(a) improved Wilson fermions in a broad range of
the momentum transfer Q^2. The running of the QED coupling, including
valence contributions from u, d, s and c quarks, is compared to
phenomenological results at intermediate Q^2 values.
Primary author
Gregorio Herdoiza
(IFT UAM-CSIC)
Co-authors
Dr
Benjamin Jaeger
(Swansea University)
Hanno Horch
(Uni Mainz)
Prof.
Hartmut Wittig
(Institut für Kernphysik, Johannes Gutenberg-Universität Mainz)
