May 6 – 12, 2012
Peniche, Portugal
Europe/Lisbon timezone

Phenomenology of Dilaton in a Chiral Linear Sigma Model with Vector Mesons

May 8, 2012, 6:30 PM
30m
Peniche, Portugal

Peniche, Portugal

Hotel Praia Norte, Av. Monsenhor Bastos, 2520-206 Peniche, Portugal

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.

Primary 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)

Presentation materials