We study the light scalar mesons a0(980) and κ using Nf = 2+1+1 flavor lattice QCD. In order to probe the internal structure of these scalar mesons, and in particular to identify, whether a sizeable tetraquark component is present, we use a large set of operators, including diquarkantidiquark, mesonic molecule and two-meson operators. The inclusion of disconnected diagrams, which are technically rather challenging, but which would allow us to extend our work to e.g. the f0(980) meson, is introduced and discussed.
Wagner, M., Alexandrou, C., Gravina, M., Daldrop, J., Urbach, C., Dalla Brida, M., et al. (2013). Scalar mesons and tetraquarks by means of lattice QCD. Intervento presentato a: 10th Conference on Quark Confinement and the Hadron Spectrum, Confinement 2012 - 8-12 October 2012, Munich, Germany [10.22323/1.171.0108].
Scalar mesons and tetraquarks by means of lattice QCD
Dalla Brida, M.;
2013
Abstract
We study the light scalar mesons a0(980) and κ using Nf = 2+1+1 flavor lattice QCD. In order to probe the internal structure of these scalar mesons, and in particular to identify, whether a sizeable tetraquark component is present, we use a large set of operators, including diquarkantidiquark, mesonic molecule and two-meson operators. The inclusion of disconnected diagrams, which are technically rather challenging, but which would allow us to extend our work to e.g. the f0(980) meson, is introduced and discussed.
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