Implications of a DK Molecule at 2.32 GeV

Abstract

We discuss the implications of a possible quasinuclear DK bound state at 2.32 GeV. Evidence for such a state was recently reported in D_s^+pi^o by the BaBar Collaboration. We first note that a conventional quark model c-sbar assignment is implausible, and then consider other options involving multiquark systems. An I=0 c sbar n nbar baryonium assignment is one possibility. We instead favor a DK meson molecule assignment, which can account for the mass and quantum numbers of this state. The higher-mass scalar c-sbar state expected at 2.48 GeV is predicted to have a very large DK coupling, which would encourage formation of an I=0 DK molecule. Isospin mixing is expected in hadron molecules, and a dominantly I=0 DK state with some I=1 admixture could explain both the narrow total width of the 2.32 GeV state as well as the observed decay to D_s^+ pi^o. Additional measurements that can be used to test this and related scenarios are discussed.

6 pages, 1 figure

References in corpus (6)

• Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32 GeV/c^2
• Scalar mesons above and below 1 GeV
• Scalar Mesons in $\varphi$ Radiative Decay: their implications for spectroscopy and for studies of CP-violation at $\varphi$ factories
• Isospin breaking exposed in f0(980)- a0(980) mixing
• New Predictions for Multiquark Hadron Masses
• The Status of Molecules

Cited by in corpus (228)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Diquark-Antidiquarks with Hidden or Open Charm and the Nature of X(3872)
• Pentaquark and Tetraquark states
• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• The New Heavy Mesons: A Status Report
• A review of the open charm and open bottom systems
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Constituent quark model study of the meson spectra
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Dynamically Generated Open and Hidden Charm Meson Systems
• The D*0 D0bar threshold resonance
• Observed D_s(2317) and tentative D(2100-2300) as the charmed cousins of the light scalar nonet
• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
• Observation of the DsJ(2317) and DsJ(2457) in B decays
• Multiquark States
• Heavy-light meson spectroscopy and Regge trajectories in the relativistic quark model
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Molecular States of Heavy Quark Mesons
• Dynamics and Decay of Heavy-Light Hadrons
• Strong and radiative decays of the Ds0*(2317) meson in the DK-molecule picture
• Interactions of Charmed Mesons with Light Pseudoscalar Mesons from Lattice QCD and Implications on the Nature of the D_{s0}^*(2317)
• Coupled-channel model for charmonium levels and an option for X(3872)
• Dynamically generated 1^+ heavy mesons
• Understanding $D_{sJ}(2317)$
• Open-charm meson resonances with negative strangeness
• Axial Resonances in the Open and Hidden Charm Sectors
• Exotic Hadrons from Heavy Ion Collisions
• Weak decays of heavy hadrons into dynamically generated resonances
• Measurements of the $D_{sJ}$ resonance properties
• Assignments of ${\Lambda }_Q$ and ${\Xi }_Q$ baryons in the heavy quark-light diquark picture
• A Comprehensive Four-Quark Interpretation of D_s(2317), D_s(2457) and D_s(2632)
• Four-quark spectroscopy within the hyperspherical formalism
• New Hadron States
• Studying Exotic Hadrons in Heavy Ion Collisions
• Two-pole structure of the $D_0^{\ast }(2400)$
• Understanding the $D_{sJ}^{+}(2317)$ and $D_{sJ}^{+}(2460)$ with Sum Rules in HQET
• Scattering lengths of Nambu-Goldstone bosons off $D$ mesons and dynamically generated heavy-light mesons
• Evidence that the Y(4660) is a f_0(980)psi' bound state
• All-charm tetraquarks
• Radiative transitions of $D_{sJ}^{\ast }(2317)$ and $D_{sJ}(2460)$
• D* K molecular structure of the Ds1(2460) meson
• Masses and decay constants of the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ from $N_f=2$ lattice QCD close to the physical point
• Towards a theory of hadron resonances
• Charmed-strange mesons revisited: mass spectra and strong decays
• The DsJ(2317): what can the Lattice say?
• Subleading contributions to the width of the D_{s0}*(2317)
• Study of $D_J$ meson decays to $D^{+}{\pi }^{-}$, $D^0{\pi }^{+}$ and $D^{\ast +}{\pi }^{-}$ final states in pp collision
• Implications of heavy quark spin symmetry on heavy meson hadronic molecules
• $X_0(2866)$ as a $D^{\ast }{\bar{K}}^{\ast }$ molecular state
• Canonical Interpretation of the D_{sJ}(2860) and D_{sJ}(2690)
• Possible S-wave Bound-States of Two Pseudoscalar Mesons
• Future Prospects for Hadron Physics at PANDA
• Mass of D*_sJ(2317) and Coupled Channel Effect
• Towards a new paradigm for heavy-light meson spectroscopy
• Disentangling two- and four-quark state pictures of the charmed scalar mesons
• Effects of S-wave thresholds
• Pionic Decays of $D_{sj}(2317)$, $D_{sj}(2460)$ and $B_{sj}(5718)$, $B_{sj}(5765)$
• Molecular components in P-wave charmed-strange mesons
• Light meson mass dependence of the positive parity heavy-strange mesons
• A Canonical Ds(2317)?
• Low-energy interactions of Nambu-Goldstone bosons with $D$ mesons in covariant chiral perturbation theory
• Strong and radiative decays of the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$
• A Study of the DsJ(2317) and DsJ(2460) Mesons in Inclusive ccbar Production Near sqrt(s) = 10.6 GeV
• Novel coupled channel framework connecting quark model and lattice QCD: an investigation on near-threshold $D_s$ states
• Open-charm meson spectroscopy
• Study of B -> DsJ(*)+ Dbar(*) Decays
• A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation
• Chromomagnetism, flavour symmetry breaking and S-wave tetraquarks
• Excited B mesons from the lattice
• How the X(5568) challenges our understanding of QCD
• Searching for possible ${\Omega }_c-$like molecular states from ${\Xi }_c^{\ast }\bar{K}/{\Xi }_c{\bar{K}}^{\ast }/{\Xi }_c^{\prime }{\bar{K}}^{\ast }$ interaction
• More kaonic bound states and a comprehensive interpretation of the D_{sJ} states
• Light Pseudoscalar Meson and Heavy Meson Scattering Lengths
• $DK$, $DDK$, and $DDDK$ molecules--understanding the nature of the $D_{s0}^{\ast }(2317)$
• Molecular structure of the Bs0*(5725) and Bs1(5778) bottom-strange mesons
• Study of the $DK$ interaction with femtoscopic correlation functions
• Contribution of constituent quark model $c\bar{s}$ states to the dynamics of the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ resonances
• The $X_0(2900)$ and its heavy quark spin partners in molecular picture
• $DDK$ system in finite volume
• $D_{s0}(2317)$ as a tetraquark state with QCD sum rules in heavy quark limit
• Study of open-charm $0^{+}$ states in unitarized chiral effective theory with one-loop potentials
• $D_{s0}^{\ast }(2317)$ and $DK$ scattering in $B$ decays from BaBar and LHCb data
• Even- and Odd-Parity Charmed Meson Masses in Heavy Hadron Chiral Perturbation Theory
• Bottomonium Spectrum with Coupled-Channel Effects
• Exclusive semileptonic B_s decays to excited D_s mesons: Search of D_{sJ}(2317) and D_{sJ}(2460)
• Study on $B_s\to D_{sJ}(2317,2460)l\bar{\nu }$ Semileptonic Decays in the CQM Model
• Masses of tetraquarks with open charm and bottom
• Heavy-strange meson molecules and possible candidates $D_{s0}^{\ast }(2317)$, $D_{s1}(2460)$, and $X_0(2900)$
• On the mass differences between the scalar and pseudoscalar heavy-light mesons
• Kinematical Cusp and Resonance Interpretations of the $X(2900)$
• The bound state problem of S-wave heavy quark meson-aitimeson systems
• Compositeness of S-wave weakly-bound states from next-to-leading order Weinberg's relations
• $K^{\ast }$ mesons with hidden charm arising from $KX(3872)$ and $K{Z}_c(3900)$ dynamics
• Triangle singularities in $B^{-}\to K^{-}{\pi }^{-}{D}_{s0}^{+}$ and $B^{-}\to K^{-}{\pi }^{-}{D}_{s1}^{+}$
• Strong decays of $D_{sJ}(2317)$ and $D_{sJ}(2460)$
• Heavy-Quark Symmetry and the Electromagnetic Decays of Excited Charmed Strange Mesons
• Understanding the nature of $D_s(2317)$ and $D_s(2460)$ through nonleptonic B Decays
• A QCD sum rule study for a charged bottom-strange scalar meson
• Contribution of $DK$ Continuum in the QCD Sum Rule for $D_{sJ}(2317)$
• Spectroscopy behavior of fully heavy tetraquarks
• Studying the scalar bound states of the $K\bar{K}$ system in the Bethe-Salpeter formalism
• Hadronic B Decays Involving Even Parity Charmed Mesons
• Open-flavor charmed/bottom $sq\bar{q}\bar{Q}$ and $qq\bar{q}\bar{Q}$ tetraquark states
• Where is the lightest charmed scalar meson?
• Study on $0^{+}$ states with open charm in unitarized heavy meson chiral approach
• From the Kappa via the Ds0*(2317) to the chi_c0: connecting light and heavy scalar mesons
• The family of strange multiquarks related to the Ds(2317) and Ds(2457)
• Structure of the axial-vector meson $D_{s1}(2460)$ and the strong coupling constant $g_{D_{s1}{D}^{\ast }K}$ with the light-cone QCD sum rules
• On the mass of the Ds(0+,1+) system
• Predicting a new resonance as charmed-strange baryonic analog of $D_{s0}^{\ast }(2317)$
• Regge Trajectories Analysis to DsJ(2317), DsJ(2460) and DsJ(2632) Mesons
• Baryonium, tetra-quark state and glue-ball in large N_c QCD
• Tetraquark Spectroscopy: A Symmetry Analysis
• New spectrum of negative-parity doubly charmed baryons: Possibility of two quasistable states
• Structure of the $D_{s0}(2317)$ and the strong coupling constant $g_{D_{s0}DK}$ with the light-cone QCD sum rules
• Radiative decays of the $D_{s0}(2317)$, $D_{s1}(2460)$ and the related strong coupling constants
• Studying the interaction between charm and light-flavor mesons
• Options for the SELEX state D$_{s\J}^+(2632)$
• Tetraquark interpolating fields in a lattice QCD investigation of the $D_{s0}^{\ast }(2317)$ meson
• Study on Decays of $D_{sJ}^{\ast }(2317)$ and $D_{sJ}(2460)$ in terms of the CQM Model
• Measurement of the absolute branching fraction of $D_{s0}^{\ast \pm }(2317)\to {\pi }^0{D}_s^{\pm }$
• Observation of a new excited $D_s^{+}$ meson in $B^0\to D^{-}{D}^{+}{K}^{+}{\pi }^{-}$ decays
• Classification of the scalar mesons: a strange pole expedition into charm and beauty territory
• Radiative decay of the dynamically generated open and hidden charm scalar meson resonances D_{s0}^*(2317) and X(3700)
• Production of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ in $B$ decays as $D^{(\ast )}K$ and $D_s^{(\ast )}\eta$ molecules
• Aspects of the low-energy constants in the chiral Lagrangian for charmed mesons
• Chiral radiative corrections and D_s(2317)/D(2308) mass puzzle
• Weak decays of heavy hadron molecules involving the f0(980)
• Production of P-wave Charmed Mesons in Hadronic B Decays
• Strong decays of the explicitly exotic doubly charmed $DDK$ bound state
• Analysis of exclusive (B_s -> D_{s_0} (2317) l nu_l) decay in "full" QCD
• Is $X(7200)$ the heavy anti-quark diquark symmetry partner of $X(3872)$?
• Diquark-Antidiquark with open charm in QCD sum rules
• A note on possible interpretations for the $D_{SJ}^{+}(2632)$ observed by SELEX
• Triple-charm molecular states composed of $D^{\ast }{D}^{\ast }D$ and $D^{\ast }{D}^{\ast }{D}^{\ast }$
• The charmed strange meson system
• Search of $D_{sJ}^{\ast }$ mesons in $B$ meson decays
• Revisiting $D_{s0}^{\ast }(2317)$ as a $0^{+}$ tetraquark state from QCD sum rules
• Radiative decays of dynamically generated charmed baryons
• Nonleptonic Weak Decays of B to D_s and D mesons
• Hadronic-loop induced mass shifts in scalar heavy-light mesons
• Lattice calculations of hadron properties
• Hadronic decay of a scalar B meson from the lattice
• Implications of chiral symmetry on $S$-wave pionic resonances and the scalar charmed mesons
• The $D_{s0}(2590{)}^{+}$ as the dressed $c\bar{s}(2^1{S}_0)$ meson in a coupled-channels calculation
• Review of Heavy Hadron Spectroscopy
• Decay constants of P-wave heavy-light mesons from unquenched lattice QCD
• Spectra of heavy-light mesons in a relativistic model
• Molecular Interpretation of the Supercharmonium State Z(4475)
• Meson-Baryon Scattering in QCD_2 for any Coupling
• Light pseudoscalar meson and heavy meson scattering lengths to $\mathcal{O}(p^4)$ in heavy meson chiral perturbation theory
• The Strong Decays of Orbitally Excited $B_{sJ}^{\ast }$ Mesons by Improved Bethe-Salpeter Method
• Nonleptonic $B\to D^{(\ast )}{D}_{sJ}^{(\ast )}$ decays and the nature of the orbitally excited charmed-strange mesons
• Charm Physics - A Field Full with Challenges and Opportunities
• The XYZs of Charmonium at BES
• Lowest lying even-parity ${\bar{B}}_s$ mesons: heavy quark spin-flavor symmetry, chiral dynamics, and constituent quark model bare masses
• Measurements of $B\to \bar{D}{D}_{s0}^{\ast +}(2317)$ decay rates and a search for isospin partners of the $D_{s0}^{\ast +}(2317)$
• Measurement of the mass and width of the Ds1(2536)+ meson
• Chiral SU(3) Quark Model Study of Tetraquark States: $cn\bar{n}\bar{s}/cs\bar{s}\bar{s}$
• A quark model suggestion against Ds*(2317) and Ds*(2460) as chiral partners of standard Ds
• Study on production of exotic $0^{+}$ meson $D_{sJ}^{\ast }(2317)$ in decays of $\psi (4415)$
• Decay Constants of $D_{sJ}^{\ast }$(2317) and $D_{sJ}$(2460)
• Decay properties of new D-mesons
• The mixing of $D_{s1}(2460)$ and $D_{s1}(2536)$
• 0^+ and 1^+ States of B and B_s Mesons
• $D_{s0}^{\ast }(2317{)}^{+}$ in the decay of $B_c$ into $J/\psi DK$
• Quadruply charmed baryons as heavy quark symmetry partners of the $D_{s0}^{\ast }(2317)$
• Four-quark structure of the excited states of heavy mesons
• X(1576) as Diquark-Antidiquark Bound State
• Axial vector tetraquark with S=+2
• One way to verify the molecular picture of exotic hadrons --from $DK$ to $DDK/D{\bar{D}}^{(\ast )}K$
• The investigations of the $P$-wave $B_s$ states combining quark model and lattice QCD in the coupled channel framework
• $D_{s0}^{\ast \pm }(2317)$ and $KD$ scattering from $B_s^0$ decay
• Strong Decays of the Radial Excited States $B(2S)$ and $D(2S)$
• Colloquium: Hadron Production in Open-charm Meson Pair at $e^{+}{e}^{-}$ Collider
• Isospin-conserving hadronic decay of the $D_{s1}(2460)$ into $D_s{\pi }^{+}{\pi }^{-}$
• Nonleptonic ${\Lambda }_b$ decays to $D_s(2317)$, $D_s(2460)$ and other final states in Factorization
• Unified covariant treatment of hyperfine splitting for heavy and light mesons
• XYZ States: Theory Overview
• Charmonium possibility of X(3872)
• QCD quark cyclobutadiene and light tetraquark spectrum
• Theoretical investigation of the molecular nature of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ and the possibility of observing the $D\bar{D}K$ bound state $K_{c\bar{c}}(4180)$ in inclusive $e^{+}{e}^{-}\to c\bar{c}$ collisions
• Higher Charmonium
• B_c meson rare decays in the light-cone quark model
• Study of $B\to D^{\ast \ast }\pi$ decays
• Exploring the mass spectrum and the electromagnetic properties of the possible ${\Xi }_{cc}{K}^{(\ast )}$ and ${\Xi }_{cc}{\bar{K}}^{(\ast )}$ molecules
• Measurements of Born Cross Sections of $e^{+}{e}^{-}\to D_s^{\ast +}{D}_{sJ}^{-}+c.c.$
• Search for a doubly-charged $DDK$ bound state in ${\rm Y}(1S,2S)$ inclusive decays and via direct production in $e^{+}{e}^{-}$ collisions at $\sqrt{s}$ = 10.520, 10.580, and 10.867 GeV
• Possible charmed-strange molecular dibaryons
• Productions of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ in $B_{(s)}$ and ${\Lambda }_b({\Xi }_b)$ decays
• Microscopic derivation of the pion coupling to heavy-light mesons
• Masses and radiative decay widths of the $D_{s0}^{\ast }(2317)$ and $D_{s1}^{\prime }(2460)$ and their bottom analogs
• P-Wave Charmed-Strange Mesons
• Isospin symmetry breaking in an algebraic pairing Sp(4) model
• S-wave DK interactions in the chiral SU(3) quark model
• Phase shifts of the light pseudoscalar meson and heavy meson scattering in heavy meson chiral perturbation theory
• Triquark structure and isospin symmetry breaking in exotic Ds mesons
• Predictions of α-decay half-lives for neutron-deficient nuclei with the aid of artificial neural network
• Radiative decays of the p-wave charmed heavy baryons
• Semileptonic decays of $B_{s1}$, $B_{s2}^{\ast }$, $B_{s0}$ and $B_{s1}^{\prime }$
• No Radial Excitations in Low Energy QCD. I. Diquarks and Classification of Mesons
• Charge-conjugation asymmetry and molecular content: the $D_{s0}^{\ast }(2317{)}^{\pm }$ in matter
• $\bar{K}\bar{D}N$ molecular state as a "$uuds\bar{c}$ pentaquark" in a three-body calculation
• Investigation of the $D_{s1}$ structure via $B_c$ to $D_{s1}{l}^{+}{l}^{-}/\nu \bar{\nu }$ transitions in QCD
• SU(3)-symmetry breaking effects and mass splitting in scalar and pseudoscalar $D^{+}$ mesons from QCD sum rules
• D_{s0}^+(2317) as an iso-triplet four-quark meson
• Are compact open-charm tetraquarks consistent with recent lattice results?
• $B_{(s)}\to D_{s0}^{\ast }(2317)P(V)$ decays in perturbative QCD approach
• $B_{s1}(5778)$ as a $B^{\ast }\bar{K}$ molecule in the Bethe-Salpeter equation approach
• Probing $D_{s0}^{\ast }(2317)$ in the decays of $B$ to two charmed mesons
• Prediction of the masses and decay processes of strange, charmed and bottomed pentaquarks from the linear molecular crypto-heptaquark model
• Decay properties of $D_{s0}^{\ast }(2317{)}^{+}$ as a conventional $c\bar{s}$ meson
• Beyond CP violation: hadronic physics at BaBar
• Analysis of the hadronic molecules $DK$, $D^{\ast }K$, $D{K}^{\ast }$ and their bottom analogs with QCD sum rules
• Charm and Charmonium Spectroscopy
• Hadronic molecules and multiquark states
• Recent issues in hadron spectroscopy
• Exotic open and hidden charm states
• Understanding open-charm mesons
• Evidence for the existence of a flavor-sextet charmed meson?
• Development of electromagnetic calorimeter detectors and simulations for spectroscopic measurements of charmonium with PANDA
• Radiative decays of hadronic molecules: From confusion to inspiration
• Systematic exploration of triply heavy tetraquarks: spectroscopic and decay characteristics
• What can we learn from the radiative decays of the $D_{s1}(2460)$ meson?
• Correlation function for the $n{\bar{D}}_{s0}^{\ast }(2317)$ interaction and the issue of elastic unitarity