P-wave charmed baryons from QCD sum rules

Atsushi Hosaka; Hua-Xing Chen; Qiang Mao; Shi-Lin Zhu; Wei Chen; Xiang Liu

P-wave charmed baryons from QCD sum rules

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arxiv 1502.01103 v2 pith:VANTDTVL submitted 2015-02-04 hep-ph hep-exhep-lat

P-wave charmed baryons from QCD sum rules

Hua-Xing Chen , Wei Chen , Qiang Mao , Atsushi Hosaka , Xiang Liu , Shi-Lin Zhu This is my paper

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We study the P-wave charmed baryons using the method of QCD sum rule in the framework of heavy quark effective theory (HQET). We consider systematically all possible baryon currents with a derivative for internal rho- and lambda-mode excitations. We have found a good working window for the currents corresponding to the rho-mode excitations for Lambda_c(2595), Lambda_c(2625), Xi_c(2790) and Xi_c(2815) which complete two SU(3) 3F_bar multiplets of J(P)=1/2(-) and 3/2(-), while the currents corresponding to the lambda-mode excitations seem also consistent with the data. Our results also suggest that there are two Sigma_c(2800) states of J(P)=1/2(-) and 3/2(-) whose mass splitting is 14 \pm 7 MeV, and two Xi_c(2980) states whose mass splitting is 12 \pm 7 MeV. They have two Omega_c partners of J(P) = 1/2(-) and 3/2(-), whose masses are around 3.25 \pm 0.20 GeV with mass splitting 10 \pm 6 MeV. All of them together complete two SU(3) 6F multiplets of J(P)=1/2(-) and 3/2(-). They may also have J(P)=5/2(-) partners. Xi_c(3080) may be one of them, and the other two are Sigma_c(5/2(-)) and Omega_c(5/2(-)), whose masses are 85 \pm 23 and 50 \pm 27 MeV larger.

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Quantum numbers of excited $\Xi_c^\prime$ and $\Omega_c$ baryons and the $P$-wave $\Sigma_c$ spectrum
hep-ph 2026-07 conditional novelty 6.0

The excited Ξ_c and Ω_c baryons share successive J^P = 1/2^-, 3/2^-, 3/2^-, 5/2^- λ-mode assignments, with Ω_c(3119) as a ρ-mode 3/2^- state and four P-wave Σ_c states predicted inside existing structures.