1. The meson as a tetraquark state
- Author
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Bracco, M.E., Lee, S.H., Nielsen, M., and da Silva, R. Rodrigues
- Subjects
- *
MESONS , *QUANTUM chromodynamics , *SUM rules (Physics) , *QUARKS , *BOREL sets , *STOCHASTIC convergence , *CURRENTS (Calculus of variations) - Abstract
Abstract: We test the validity of the QCD sum rules applied to the meson , by considering a diquark–antidiquark type of current with and with . We find that, with the studied currents, it is possible to find an acceptable Borel window. In such a Borel window we have simultaneously a good OPE convergence and a pole contribution which is bigger than the continuum contribution. We get and for the currents with and , respectively. We conclude that the QCD sum rules results favors quantum numbers for the meson. [Copyright &y& Elsevier]
- Published
- 2009
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