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arXiv · 2004.08999

Charmed baryon spectrum from lattice QCD near the physical point

Huseyin Bahtiyar·Kadir Utku Can·Guray Erkol·Philipp Gubler·Makoto Oka·Toru T. Takahashi
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Abstract

We calculate the low-lying spectrum of charmed baryons in lattice QCD on the $32^3\times64$, $N_f=2+1$ PACS-CS gauge configurations at the almost physical pion mass of $\sim 156$ MeV/c$^2$. By employing a set of interpolating operators with different Dirac structures and quark-field smearings for the variational analysis, we extract the ground and first few excited states of the spin-$1/2$ and spin-$3/2$, singly-, doubly-, and triply-charmed baryons. Additionally, we study the $\Xi_c$-$\Xi_c^\prime$ mixing and the operator dependence of the excited states in a variational approach. We identify several states that lie close to the experimentally observed excited states of the $\Sigma_c$, $\Xi_c$ and $\Omega_c$ baryons, including some of the $\Xi_c$ states recently reported by LHCb. Our results for the doubly- and triply-charmed baryons are suggestive for future experiments.

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Huseyin Bahtiyar, Kadir Utku Can, Guray Erkol, Philipp Gubler, Makoto Oka, Toru T. Takahashi. 2020-04-20. Charmed baryon spectrum from lattice QCD near the physical point. https://doi.org/10.1103/physrevd.102.054513

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