Structure of the Scalars
classification
✦ hep-ph
keywords
modelquarkbelongbeyondconsequentlydiscusseddistinguisheven
read the original abstract
The PDG Tables list more scalar mesons than can fit into one quark model nonet: indeed, even more than can belong to two multiplets. Consequently, some of these must be states beyond the quark model. So which of these is ${\bar q}q$ or ${\bar{qq}}qq$ or multi-meson molecule or largely glue? How experiment can help us distinguish between these possibilities is discussed.
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