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Charmed baryons at the physical point in 2+1 flavor lattice QCD · Around

2013

Charmed baryons at the physical point in 2+1 flavor lattice QCD

Namekawa, Y., Aoki, S., Ishikawa, K. -I. et al.

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We investigate the charmed baryon mass spectrum using the relativistic heavy quark action on 2+1 flavor PACS-CS configurations previously generated on $32^3 \times 64$ lattice.

The dynamical up-down and strange quark masses are tuned to their physical values, reweighted from those employed in the configuration generation.
At the physical point, the inverse lattice spacing determined from the $\Omega$ baryon mass gives $a^{-1}=2.194(10)$ GeV, and thus the spatial extent becomes $L = 32 a = 2.88(1)$ fm.
Our results for the charmed baryon masses are consistent with experimental values, except for the mass of $\Xi_{cc}$, which has been measured by only one experimental group so far and has not been confirmed yet by others.

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