${\Lambda }_c^{+}(2940)$: A Possible Molecular State?

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 $D^{\ast 0}$ and $p$ masses suggesting a possibility that this state may be a $D^{\ast 0}p$ 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 $D^{\ast 0}p$ molecular state it is likely a $1/2^{-}$ state. Several other decays modes are also suggested to further test the molecular structure of ${\Lambda }_c^{+}(2940)$.

8 pages, 9 figures, 1 table. Some descriptions changed, more references added and typos corrected. Published version in EPJC

References in corpus (12)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Final State Interactions in Hadronic B Decays
• Observation of a Charmed Baryon Decaying to D0 p at a Mass Near 2.94 GeV/c2
• Charmed baryons in a relativistic quark model
• Observation of New States Decaying into ${\Lambda }_c^{+}{\pi }^{-}{\pi }^{+}$
• Rates for the reactions antiproton-proton --> pi phi and gamma phi
• Predictions for s-Wave and p-Wave Heavy Baryons from Sum Rules and Constituent Quark Model (I): Strong Interactions
• Possible Molecular Structure of the Newly Observed Y(4260)
• The Y(4260) as an omega chi_{c1} molecular state
• Threshold effects in excited charmed baryon decays
• Mixing of Pentaquark and Molecular States
• Implications of a $\chi (3.86)$ State for Theoretical Models

Cited by in corpus (55)

• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• Heavy Baryons in a Quark Model
• A review of the open charm and open bottom systems
• Baryon spectroscopy
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• The possible hidden-charm molecular baryons composed of anti-charmed meson and charmed baryon
• X(3872) and Other Possible Heavy Molecular States
• The s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry
• Charmed baryon strong decays in a chiral quark model
• Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation Theory: An Update
• Strong two-body decays of the Lambdac(2940)+ in a hadronic molecule picture
• How Resonances can synchronise with Thresholds
• $Z^{+}(4430)$ as a $D_1^{\prime }{D}^{\ast }$ ($D_1{D}^{\ast }$) molecular state
• Radiative decay of Lambdac(2940)+ in a hadronic molecule picture
• Dynamically generated $J^P=1/2^{-}(3/2^{-})$ singly charmed and bottom heavy baryons
• The observed charmed hadron ${\Lambda }_c(2940{)}^{+}$ and the $D^{\ast }N$ interaction
• $S$-wave $D^{(\ast )}N$ molecular states: ${\Sigma }_c(2800)$ and ${\Lambda }_c(2940{)}^{+}$?
• Role of the ${\Lambda }_c^{+}(2940)$ in the ${\pi }^{-}p\to D^{-}{D}^{0}p$ reaction close to threshold
• Resolving the low mass puzzle of ${\Lambda }_c(2940{)}^{+}$
• Pentaquarks with hidden charm as hadroquarkonia
• Newly observed ${\Lambda }_c(2860{)}^{+}$ at LHCb and its \emph{D}-wave partners ${\Lambda }_c(2880{)}^{+}$, ${\Xi }_c(3055{)}^{+}$ and ${\Xi }_c(3080{)}^{+}$
• Role of the hadron molecule Lambda_c(2940) in the p bar(p) -> p D0 bar(Lambda)_c(2286) annihilation reaction
• Strong decay of ${\Lambda }_c(2940)$ as a $2P$ state in the ${\Lambda }_c$ family
• $D^{(\ast )}N$ interaction and the structure of ${\Sigma }_c(2800)$ and ${\Lambda }_c(2940)$ in chiral effective field theory
• Strong three-body decays of Lambdac(2940)+
• $J^P$ Assignments of ${\Lambda }_c^{+}$ Baryons
• Strong Decays of observed ${\Lambda }_c$ Baryons in the ${}^3{P}_0$ Model
• Production of charmed baryon ${\Lambda }_c(2940{)}^{+}$ at PANDA
• Long-distant contribution and ${\chi }_{c1}$ radiative decays to light vector meson
• Heavy-hadron molecular spectrum from light-meson exchange saturation
• Anticharmed strange pentaquarks from the one-boson-exchange model
• Hadronic molecules for charmed and bottom baryons near thresholds
• Double-charm heptaquark states composed of two charmed mesons and one nucleon
• Molecular charmed baryons and pentaquarks from light-meson exchange saturation
• ${\Lambda }_c(2910)$ and ${\Lambda }_c(2940)$ as the conventional baryons dressed with the $D^{\ast }N$ channel
• ${\Lambda }_c^{+}(2940)$ photoproduction off the neutron
• Production of charmed baryon ${\Lambda }_c(2940)$ by kaon-induced reaction on a proton target
• $ND$ and $NB$ systems in quark delocalization color screening model
• Open charm hadron spectroscopy at B-factories
• Identifying Glueball at 3.02 GeV in Baryonic $B$ Decays
• The newly observed ${\Lambda }_b(6072{)}^0$ structure and its $\rho -$mode nonstrange partners
• Predicting exotic molecular states composed of nucleon and P-wave charmed meson
• What can we learn from the decay of $N_X(1625)$ in molecule picture?
• Possibly New Charmed Baryon States from ${\bar{B}}^0\to p\bar{p}{D}^0$ Decay
• Multiquark contributions to charm baryon spectroscopy
• Charmed baryon resonances with heavy-quark symmetry
• Investigate the pentaquark resonance in the $NK$ system
• Photoproduction of the $X(3872)$ beyond vector meson dominance: the open-charm coupled-channel mechanism
• Unveiling the Composition of the Single-Charm Molecular Pentaquarks: Insights from Radiative Decay and Magnetic Moment
• Possibility of ${\Sigma }_c(2800)$ and ${\Lambda }_c(2940{)}^{+}$ as $S$-wave $D^{(\ast )}N$ molecular states
• Production of open-charm pentaquark molecules in decay $B^0\to {\bar{D}}^{0}p\bar{p}$
• Octet baryon and heavy meson interactions in chiral effective field theory
• Towards the decays of ${\bar{N}}_X(1625)$ in the molecular picture
• Electromagnetic probes revealing the inner structure of the ${\Lambda }_c(2940)$