Speaker
Mr
Stanislaus Janowski
(Institute for Theoretical Physics, J. W. Goethe University)
Description
We present a two-flavour linear sigma model with global chiral
symmetry and (axial-)vector mesons as well as an additional glueball
degree of freedom. We study the structure of the well-established
scalar resonances f0(1370) and f0(1500): by a
fit to experimentally
known decay widths we
find that f0(1370) is predominantly a
quark-antiquark state and f0(1500) is predominantly a glueball state. The overall phenomenology of these two resonances can be well
described. Other assignments for our mixed quarkonium-glueball states
are also tested, but turn out to be in worse agreement with the
phenomenology. As a by-product of our analysis, the gluon condensate is determined.
Author
Mr
Stanislaus Janowski
(Institute for Theoretical Physics, J. W. Goethe University)
Co-authors
Prof.
Dirk H. Rischke
(Institute for Theoretical Physics, J. W. Goethe University)
Dr
Francesco Giacosa
(Institute for Theoretical Physics, J. W. Goethe University)
