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Quark model with Hidden Local Symmetry and its application to $T_{cc}$
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abstract
We propose a chiral quark model including the $\omega$ and $\rho$ meson contributions in addition to the $\pi$ and $\sigma$ meson contributions. We show that the masses of the ground state baryons such as the nucleon, $\Lambda_c$ and $\Lambda_b$ are dramatically improved in the model with the vector mesons compared with the one without them. The study of the tetraquark $T_{cc}$ is also performed in a coupled channel calculation and the resultant mass is much closer to its experimental value than the result without vector meson contribution. This approach can be applied to the future study of multi-quark systems.
Forward citations
Cited by 3 Pith papers
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Singly heavy tetraquarks
A hybrid quark model with gluon and meson exchange predicts that LHCb's T-c̄s̄0(2870) and T-cs̄0(2900) are compact tetraquarks, and that Ds0(2317), Ds1(2460), Tbs(5568), and Tcs(2327) are not.
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Inverse Excitation Hierarchy in Doubly-Heavy Tetraquarks within the Diquark Model
In a diquark-model calculation, the ρ-mode excitation of Tcc (inside the light diquark) lies below the λ-mode excitation (between diquarks), an 'inverse hierarchy' driven by the light diquark's large size.
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Establishing the vector-meson-exchange dominance for the short range interactions of light quarks
The paper claims that vector meson exchange, not one gluon exchange, dominates short-range quark interactions by pointing to agreement between a dibaryon study and earlier model work.
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