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Dibaryon with highest charm number near unitarity from lattice QCD
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abstract
A pair of triply charmed baryons, $\Omega_{ccc}\Omega_{ccc}$, is studied as an ideal dibaryon system by (2+1)-flavor lattice QCD with nearly physical light-quark masses and the relativistic heavy quark action with the physical charm quark mass. The spatial baryon-baryon correlation is related to their scattering parameters on the basis of the HAL QCD method. The $\Omega_{ccc}\Omega_{ccc}$ in the ${^1S_0}$ channel taking into account the Coulomb repulsion with the charge form factor of $\Omega_{ccc}$ leads to the scattering length $a^{\rm C}_0\simeq -19~\text{fm}$ and the effective range $r^{\rm C}_{\mathrm{eff}}\simeq 0.45~\text{fm}$. The ratio $r^{\rm C}_{\mathrm{eff}}/a^{\rm C}_0 \simeq -0.024$, whose magnitude is considerably smaller than that of the dineutron ($-0.149$), indicates that $\Omega_{ccc}\Omega_{ccc}$ is located in the unitary regime.
Forward citations
Cited by 7 Pith papers
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$S$-wave kaon-nucleon interactions from lattice QCD at the physical point
First physical-point lattice QCD calculation of S-wave kaon-nucleon interactions finds no resonance or bound state, with scattering lengths -0.226(5) fm (I=1) and +0.031(62) fm (I=0).
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Lattice QCD Study of Positive Parity Dibaryons with Maximal Charm and Strangeness
Lattice QCD finds the Omega_ccc-Omega_ccc dibaryon likely bound by about 45 MeV in the spin-0 channel, Omega-Omega near threshold, and both spin-2 systems unbound.
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Wavefunction-based operator optimization for two-hadron systems in lattice QCD
Wavefunction-based operator optimization with Z3-noise smearing isolates two nearly degenerate two-hadron states in lattice QCD, demonstrated on Omega_ccc Omega_ccc.
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Decoding Two-Particle States in QCD with Spatial Wavefunctions
A lattice QCD method using spatial wavefunctions and Z3-noise quark smearing resolves two Omega_ccc pair states separated by about 5 MeV.
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Mass spectrum, magnetic moments and Regge trajectories of $\Omega_{ccb}$ and $\Omega_{cbb}$ baryons in the nonrelativistic quark--diquark model
In a nonrelativistic quark-diquark model fitted to B_c meson data, the authors predict ground-state masses of ~8.0 GeV for Ω_ccb and ~11.0 GeV for Ω_cbb along with magnetic moments and Regge trajectories for different...
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Unquenched Charmonium and Beyond
This Lanzhou-group review argues that coupled-channel (unquenched) effects, not exotic constituents, are the common thread explaining charmonium anomalies from the rho-pi puzzle to the Y-problem states.
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Recent progress on charmed hadron interactions from lattice QCD
A review of lattice QCD results on charmed hadron interactions: T_cc near threshold, an attractive N-J/psi force, and an Omega_ccc-Omega_ccc state near unitarity.
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