90 citations · 171 across the 7 of their papers we have counts for
7 papers
How Universal is the Coupling in the Sigma Model?
Denis Parganlija, Francesco Giacosa, Dirk H. Rischke
We calculate pion-pion scattering lengths and sigma, rho and a1 decay widths from a gauged linear sigma model with two flavours and its globally invariant generalisation.
Radiative decays with derivative interactions
Francesco Giacosa, Giuseppe Pagliara
We study the line shapes of radiative -decays involving virtual and mesons which decay, via derivative couplings, to and respecti…
Light scalars as tetraquarks: decays and mixing with quarkonia
Francesco Giacosa
The tetraquark assignement for light scalar states below 1 GeV is discussed on the light of strong decays. The next-to-leading order in the large-N expansion for the strong decays…
On the two-photon decay width of the sigma meson
Francesco Giacosa, Thomas Gutsche, Valery E. Lyubovitskij
We shortly report on the two-photon decay width of the light -meson interpreted as a quarkonium state. Results are given in dependence on the -mass and the constituent mass o…
On the spectral functions of scalar mesons
Francesco Giacosa, Giuseppe Pagliara
In this work we study the spectral functions of scalar mesons in one- and two-channel cases. When the propagators satisfy the Källen-Lehman representation a normalized spectral fun…
Nonperturbative screening of the Landau pole
Francesco Giacosa, Ralf Hofmann
Based on the trace anomaly for the energy-momentum tensor, an effective theory for the thermodynamics of the deconfining phase, and by assuming the asymptotic behavior to be determ…