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$\Lambda_{c}^{+}(2940)$: A Possible Molecular State?

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arxiv hep-ph/0606015 v3 pith:QQGATTWB submitted 2006-06-01 hep-ph

classification hep-ph
keywords statelambdamolecularchannelcollaborationdatastructurebabar
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

A new baryonic state $\Lambda_{c}(2940)^{+}$ has recently been discovered by the Babar collaboration in the $D^{0}p$ channel. Later Belle collaboration also observed this state in the $\Sigma_c(2455)^{0,++} \pi^{\pm}\to \Lambda_{c}^{+}\pi^{+}\pi^{-}$ channel. The mass of $\Lambda_{c}(2940)^{+}$ is just a few MeV below the sum of $D^{*0}$ and $p$ masses suggesting a possibility that this state may be a $D^{*0} p$ molecular state. In this paper we study whether such a molecular state can be consistent with data. We find that the molecular structure can explain data and that if $\Lambda_c(2940)^+$ is a $D^{*0} p$ molecular state it is likely a $1/2^-$ state. Several other decays modes are also suggested to further test the molecular structure of $\Lambda_c^+(2940)$.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Prediction of $QQqq\bar{s}$ molecular pentaquarks within the extended local hidden gauge approach

    hep-ph 2025-08 reject novelty 6.0 of 10

    A model calculation predicts fourteen double-heavy molecular pentaquark states, but their existence and binding energies depend critically on an unconstrained regularization parameter.

  2. Two-body Hidden Charm Decays of $D$ Wave Charmonia

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Using a meson-loop model calibrated to psi(3770) to J/psi eta, the paper predicts Gamma(psi2(3823) to J/psi eta) = 29.6 keV and smaller eta_c omega and psi3(3842) rates.

  3. Investigation of $\Lambda_c$ States and $(\bar{D}N)$ Molecules Production at EicC and EIC

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Photoproduction and electroproduction yields of Lambda_c(2940) as a molecule versus a three-quark state are predicted to be of the same order of magnitude at EicC and EIC, with total yields of 10^5 to 10^7 events.

  4. Study of the exotic three-body $N D^* \bar{K}^*$ system

    hep-ph 2024-11 conditional novelty 5.0 of 10

    A fixed-center Faddeev calculation predicts five N D* K̄* bound states with spin 1/2, 3/2, 5/2 and binding energies of 10 to 30 MeV.

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