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Effects of S-wave thresholds
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abstract
The opening of a new S-wave threshold is frequently accompanied by an abrupt dip in the magnitude of an amplitude for an already-open channel. One familiar example is the behavior of the I=0 S-wave $\pi \pi$ scattering amplitude at $K \bar K$ threshold. Numerous other examples of this phenomenon in recent data are noted, and a unified description of the underlying dynamics is sought.
Forward citations
Cited by 2 Pith papers
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QCD Sum Rule Analysis of Triply Heavy $(Q\bar{Q})(Q\bar{q})$ Tetraquark States with $J^P=0^{\pm}$
QCD sum rule analysis predicts four (c cbar)(c qbar) tetraquark candidates with J^P=0+/- (4.76, 5.00, 5.04 and 5.37 GeV) and (b bbar)(b qbar) states near 13.8 to 14.2 GeV, with some expected to be narrow.
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Investigating triply heavy tetraquark states through QCD sum rules
QCD sum rules with condensates up to dimension 9 predict triply heavy tetraquark masses of 5.4 to 6.2 GeV for charm systems and 14.9 to 15.7 GeV for bottom systems.
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