Speaker
Dr
Paul Rakow
(University of Liverpool)
Description
We present results on the pseudoscalar meson masses from
a fully dynamical simulation of QCD plus QED. We concentrate
particularly on the question of how to divide the measured
masses into a QED contribution and a QCD contribution.
This decomposition is not unique, it depends on the
renormalisation scheme and scale. We suggest a renormalisation
scheme in which Dashen's theorem holds, so that the electromagnetic
self-energies of the neutral mesons are zero, and discuss
how the self-energies change when we transform to a scheme
such as MS-bar, in which Dashen's theorem is violated.
Primary author
Dr
Paul Rakow
(University of Liverpool)
Co-authors
Dr
Arwed Schiller
(Leipzig University)
Prof.
Dirk Pleiter
(Julich, Forschungszentrum & Regensburg U)
Prof.
Gerrit Schierholz
(DESY)
Dr
Hinnerk Stueben
(University of Hamburg)
Dr
Holger Perlt
(Leipzig University)
Dr
James Zanotti
(University of Adelaide)
Dr
Roger Horsley
(University of Edinburgh)
Dr
Ross Young
(University of Adelaide)
Dr
Yoshifumi Nakamura
(RIKEN AICS)
