20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

The Quest for Light Scalar Quarkonia from an Nf=3 Linear Sigma Model with Vectors and Axial-Vectors

Not scheduled
Dauphine (Alpes Congrès - Alpexpo)

Dauphine

Alpes Congrès - Alpexpo

Poster QCD

Speaker

Denis Parganlija (Frankfurt University - Institute for Theoretical Physics)

Description

Current experimental data provide us with five scalar isoscalar meson states in the low-energy region, i.e. the region up to 1.8 GeV: f0(600), f0(980), f0(1370), f0(1500) and f0(1710). The issue of the structure of these states (quark-antiquark, tetraquark, meson-meson molecules...) has been extensively, but not conclusively, debated in the last decades. We use a U(3)xU(3) Linear Sigma Model with vector and axial-vector Mesons to address the nature of the scalar mesons above 1 GeV. A global fit including the masses of scalar, pseudoscalar, vector and axial-vector states is performed and its results favour the scalar mesons in the region above 1 GeV to be quarkonia (quark-antiquark states). We also discuss a possibility to identify the scalar glueball which also turns out to be in the region above 1 GeV, in accordance with the lattice predictions.

Primary author

Denis Parganlija (Frankfurt University - Institute for Theoretical Physics)

Co-authors

Dirk H. Rischke (Frankfurt University - Institute for Theoretical Physics) Dr Francesco Giacosa (Frankfurt University - Institute for Theoretical Physics) György Wolf (RMKI Budapest) Dr Peter Kovacs (RMKI Budapest)

Presentation Materials