Speaker
sasa prelovsek
(University of Ljubljana)
Please give a brief summary of your poster
Some properties of the lowest lying scalar mesons are in conflict with the conventional $\bar qq$ assignment and can be naturally explained if these are tetraquark states. We present a search for possible existence of light scalar tetraquarks on the lattice. The spectrum of physical states with a given isospin and J^PC=O^++ is determined using a large number of tetraquark interpolators at the source and the sink. In the I=0 channel, we unavoidably find discrete two-pion states, but we also find an additional light state which could be possibly related to the sigma resonance with a strong tetraquark component. In the exotic I=2 channel, where no resonance is expected, we find no light state in addition to two-pion states.
Primary author
sasa prelovsek
(University of Ljubljana)
Co-authors
Prof.
Christian Lang
(University of Graz)
Daniel Mohler
(University of Graz)
Prof.
Keh-Fei Liu
(University of Kentucky)
Marcus Limmer
(University of Graz)
Prof.
Nilmani Mathur
(Tata Institute, India)
Prof.
Terry Draper
(University of Kentucky)
