The first lattice QCD study of Lambda_c Lambda_c scattering finds a repulsive interaction with scattering length a0 = -0.21(4)(8) fm.
Doubly charmed multibaryon systems
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abstract
We study two- and three-baryon systems with two units of charm looking for possible bound states or resonances. All two-baryon interactions are consistently derived from a constituent quark model tuned in the light-flavor hadron phenomenology: spectra and interactions. The presence of the heavy quarks makes the two-body interactions simpler than in the light-flavor sector. Our results show a narrow two-body resonance with quantum numbers $(I,J^P)=(0,0^+)$. It is located 6.2 MeV below the $\Sigma_c\Sigma_c$ threshold and has a width of 4.7 MeV. The foregoing two-body state contributes to generate a $N \Sigma_c\Sigma_c$ resonance with quantum numbers $(I,J^P)=(1/2,1/2^+)$ and a separation energy of 0.2 MeV.
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Lattice QCD study of $\Lambda_c \Lambda_c$ scattering
The first lattice QCD study of Lambda_c Lambda_c scattering finds a repulsive interaction with scattering length a0 = -0.21(4)(8) fm.