Description
By systematic analysis, the contributions to two- and three-point Green functions that involve operators interpolating multiquark hadrons may be unambiguously and disjointly separated into those that may support a given multiquark and those that definitely do not. Upon evaluation of any such Green function within the framework of QCD sum rules, the rigorously identifiable latter contributions may and should be split off, whereas the former contributions constitute “multiquark-adequate” QCD sum rules potentially capable of providing information about the exotic hadron under study. The “multiquark-phile” contributions to Green functions necessarily involve at least two gluon exchanges of appropriate topology.
Primary author
Wolfgang LUCHA
(Austrian Academy of Sciences)
Co-authors
Dmitri Melikhov
(Moscow State University)
Hagop Sazdjian
(IPN Orsay)
