Λc(2940)+: a possible molecular state?

He, Xiao‐Gang; Li, Xue–Qian; Liu, Xiang; Zeng, X.

doi:10.1140/epjc/s10052-007-0347-y

Cited by 77 publications

(47 citation statements)

References 24 publications

(22 reference statements)

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“…In this mass region, it can be J P 5=2 , J P 3=2 , J P 1=2 , or J P 5=2 ÿ , as suggested by the quark model [41]. The 3 P 0 model [6] suggests that its configuration favors , while a molecular state with J P 1=2 ÿ is also proposed [42].…”

Section: C 2880mentioning

confidence: 95%

Charmed baryon strong decays in a chiral quark model

2008

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Charmed baryon strong decays are studied in a chiral quark model. The data for the decays of $\Lambda^+_c(2593)$, $\Lambda^+_c(2625)$, $\Sigma^{++,+,0}_c$ and $\Sigma^{+,0}_c(2520)$, are accounted for successfully, which allows to fix the pseudoscalar-meson-quark couplings in an effective chiral Lagrangian. Extending this framework to analyze the strong decays of the newly observed charmed baryons, we classify that both $\Lambda_c(2880)$ and $\Lambda_c(2940)$ are $D$-wave states in the N=2 shell; $\Lambda_c(2880)$ could be $|\Lambda_c ^2 D_{\lambda\lambda}{3/2}^+>$ and $\Lambda_c(2940)$ could be $|\Lambda_c ^2 D_{\lambda\lambda}{5/2}^+>$. Our calculation also suggests that $\Lambda_c(2765)$ is very likely a $\rho$-mode $P$-wave excited state in the N=1 shell, and favors a $|\Lambda_c ^4P_\rho 1/2^->$ configuration. The $\Sigma_c(2800)$ favors being a $|\Sigma_c ^2P_\lambda{1/2}^->$ state. But its being $|\Sigma^{++}_c ^4 P_\lambda{5/2}^->$ cannot be ruled out.Comment: 22 pages, 16 tables; typos corrected;version to appear in PR

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Section: C 2880mentioning

confidence: 95%

Charmed baryon strong decays in a chiral quark model

2008

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“…The proximity of their masses to the thresholds inspired molecular explanations of these structures [196,215,216,202,217,218,219,220,221,222,223,224,225,203,226,200,227,228,229,230,231,232,233,234,235,236,237,238,239]. With the refinement of the meson exchange model, many subtle aspects of this framework were investigated, such as the S-D wave mixing effect [185,197], coupled-channel effect [240,241,242], and recoil correction [243,244].…”

Section: The Meson Exchange Modelmentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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“…[11] no quantitative results were presented yet. This is because an unknown coupling constant for the vertex N D * Σ c occured in the considerations of Ref.…”

Section: +8 +27mentioning

confidence: 99%

“…This is because an unknown coupling constant for the vertex N D * Σ c occured in the considerations of Ref. [11]. However, a quantitative prediction for the three-body decay widths of Λ c (2940) + → Λ c (2286) + + 2π could be done using information about two-body decays Λ c (2940) + → Σ c (2455)+π done in Ref.…”

Section: +8 +27mentioning

confidence: 99%

Strong three-body decays ofΛc(2940)+in a hadronic molecule picture

et al. 2011

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The Λc (2940) + baryon with quantum numbers+ is considered as a hadronic molecule composed of a nucleon and D * meson. We give predictions for the width of the strong three-body decay processes Λc (2940) + → Λc(2286) + π + π − and Λc(2286) + π 0 π 0 in this interpretation. Upcoming experimental facilities like a Super B factory at KEK or LHCb might be able to provide data on these decay modes.

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Λc(2940)+: a possible molecular state?

Cited by 77 publications

References 24 publications

Charmed baryon strong decays in a chiral quark model

Charmed baryon strong decays in a chiral quark model

The hidden-charm pentaquark and tetraquark states

Strong three-body decays ofΛc(2940)+in a hadronic molecule picture

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