Speaker
Dmitri Melikhov
(HEPHY)
Description
We study four-point functions of bilinear quark currents in QCD at large-Nc and obtain conditions for the existence of narrow tetraquark states. We then discuss three-point functions involving one tetraquark interpolating current and two biblinear quark currents and obtain the large-Nc behavior of the tetraquark decay constants. Finally, we discuss the implications of these results for the analyses of tetraquark mesons within the method of QCD sum rules.
Authors
Dmitri Melikhov
(HEPHY)
Wolfgang Lucha
(Austrian Academy of Sciences)
Hagop Sazdjian
(University Paris-Sud)
