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arXiv · 1503.06740

Analysis of the $Λ_c(2625)$ and $Ξ_c(2815)$ with QCD sum rules

Zhi-Gang Wang
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Abstract

In this article, we study the charmed baryon states $Λ_c(2625)$ and $Ξ_c(2815)$ with the spin-parity ${3\over 2}^-$ by subtracting the contributions from the corresponding charmed baryon states with the spin-parity ${3\over 2}^+$ using the QCD sum rules, and suggest a formula $ μ=\sqrt{M_{Λ_c/Ξ_c}^2-{\mathbb{M}}_c^2}$ with the effective mass ${\mathbb{M}}_c=1.8\,\rm{GeV}$ to determine the energy scales of the QCD spectral densities, and make reasonable predictions for the masses and pole residues. The numerical results indicate that the $Λ_c(2625)$ and $Ξ_c(2815)$ have at least two remarkable under-structures.

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Zhi-Gang Wang. 2015-07-24. Analysis of the $Λ_c(2625)$ and $Ξ_c(2815)$ with QCD sum rules. https://doi.org/10.1140/epjc%2Fs10052-015-3588-1

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