Abstract
We use QCD sum rules to study mass spectra of $P$-wave charmed baryons of the $SU(3)$ flavor $\mathbf{6}_F$. We also use light-cone sum rules to study their $S$- and $D$-wave decays into ground-state charmed baryons together with light pseudoscalar and vector mesons. We work within the framework of heavy quark effective theory, and we also consider the mixing effect. Our results can explain many excited charmed baryons as a whole, including the $\Sigma_c(2800)^0$, $\Xi_c(2923)^0$, $\Xi_c(2939)^0$, $\Xi_{c}(2965)^{0}$, $\Omega_c(3000)^0$, $\Omega_c(3050)^0$, $\Omega_c(3066)^0$, $\Omega_c(3090)^0$, and $\Omega_c(3119)^0$. Their masses, mass splittings within the same multiplets, and decay properties are extracted for future experimental searches.
Highlights
−5.0 MeV; The singly heavy baryon system is an ideal platform to study the fine structure of hadron spectra [1,2,3,4], where light quarks and gluons circle around the nearly static heavy quark, and the whole system behaves as the QCD analogue of the hydrogen [5,6,7,8]
The 1⁄26F ; 1; 0; ρ doublet contains altogether six charmed baryons: Σc ð12− =32− Þ, Ξc ð12− =32− Þ, and Ωc ð12− =32− Þ. We study their S- and D-wave decays into ground-state charmed baryons together with light pseudoscalar and vector mesons
The 1⁄26F ; 0; 1; λ doublet contains altogether three charmed baryons: Σc ð12− Þ, Ξc ð12− Þ, and Ωc ð12− Þ
Summary
−5.0 MeV; The singly heavy baryon system is an ideal platform to study the fine structure of hadron spectra [1,2,3,4], where light quarks and gluons circle around the nearly static heavy quark, and the whole system behaves as the QCD analogue of the hydrogen [5,6,7,8]. Important experimental progresses have been made in the field of excited singly charmed baryons; e.g., the Λc ð2595Þ, Λc ð2625Þ, Ξc ð2790Þ, and Ξc ð2815Þ can be well interpreted as the P-wave charmed baryons completing two SUð3Þ flavor 3̄F multiplets of J P 1⁄4 1=2− and 3=2− [9,10,11,12]. The. Σc ð2800Þ, Ξc ð2930Þ, and Ξc ð2970Þ are P-wave charmed baryon candidates of the SUð3Þ flavor 6F , whose experimental parameters are [13,14,15,16,17,18,19,20,21], Σc ð2800Þþþ ∶ M 1⁄4 2801þ4. In the past five years, the LHCb Collaboration discovered as many as eight excited charmed baryons:. Ωc ð3119Þ0 in the Ξþ c K invariant mass spectrum with a sample of pp collision data, whose experimental parameters are [22]
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