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$\Sigma_c\Sigma_c$ interactions in chiral effective field theory
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abstract
We study the interactions of the $\Sigma_c\Sigma_c$ system in the framework of chiral effective theory. We consider the contact, one-pion and two-pion exchange interactions and bridge the low energy constants of the $\Sigma_c\Sigma_c$ system to those of the $\Sigma_c^{(*)}\bar{D}^{(*)}$ systems through the quark-level ansatz for the contact interaction. We explore the influence of intermediate channels in the two-pion exchange diagrams of the $\Sigma_c\Sigma_c$ system. We obtain a deep bound state $[\Sigma_c\Sigma_c]_{J=0}^{I=0}$ and a shallow bound state $[\Sigma_c\Sigma_c]_{J=1}^{I=1}$. As a byproduct, we further investigate the interactions of the $\Lambda_c\Lambda_c$ and $\Lambda_c\Sigma_c$ systems.
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Cited by 1 Pith paper
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Investigating the two-pion exchange of the double charm $DD^*$ chiral interactions and $T_{cc}$
In this chiral EFT calculation the I=0 DD* two-pion-exchange potential is repulsive, and its near-cancellation with attractive contact and one-pion terms provides the weak binding of Tcc.
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