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$\Lambda_c(2910)$ and $\Lambda_c(2940)$ as the conventional baryons dressed with the $D^*N$ channel

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arxiv 2210.17188 v2 pith:K436CDYE submitted 2022-10-31 hep-ph hep-ex

Zi-Le Zhang , Zhan-Wei Liu , Si-Qiang Luo , Fu-Lai Wang , Bo Wang , Hao Xu This is my paper · ORCID
classification hep-phhep-ex
keywords lambdaconventionalchanneldressedmassbaryonsconsidercore
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abstract

In this work, we treat $\Lambda_c(2910)^+$ and $\Lambda_c(2940)^+$ as the conventional $udc$ cores dressed with the $D^*N$ channel. We provide a possible interpretation to both $\Lambda_c(2910)^+$ and $\Lambda_c(2940)^+$ within the same framework. In the study, we consider not only the effects between the conventional triquark core and the $D^*N$ channel but also the $D^*N$-$D^*N$ interactions. The mass of $\Lambda_c$ state with $J^P=1/2^-$ is larger than that with $J^P=3/2^-$ in this unquenched picture, which is very different from the prediction of the conventional quenched quark model. Based on the mass spectrum, the spin-parity of $\Lambda_c(2940)^+$ is more likely to be $1/2^-$ while $\Lambda_c(2910)^+$ prefers $3/2^-$. We look forward to the future experiments can test our results with more precise experimental data.

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Cited by 3 Pith papers

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    hep-ph 2026-07 conditional novelty 5.0 of 10

    A quark-model calculation with rigorous orbital mixing reproduces 74 singly heavy baryon masses with an average deviation of 6.96 MeV.

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    In this chiral EFT calculation the I=0 DD* two-pion-exchange potential is repulsive, and its near-cancellation with attractive contact and one-pion terms provides the weak binding of Tcc.

  3. Unquenched Charmonium and Beyond

    hep-ph 2026-02 conditional novelty 2.0 of 10

    This Lanzhou-group review argues that coupled-channel (unquenched) effects, not exotic constituents, are the common thread explaining charmonium anomalies from the rho-pi puzzle to the Y-problem states.

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