The $X_0(2900)$ and its heavy quark spin partners in molecular picture

Abstract

The $X_0(2900)$ observed by the LHCb Collaboration recently in the $D^{-}{K}^{+}$ invariant mass of the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ process is the first exotic candidate with four different flavors, which opens a new era for the hadron community. Under the assumption that the $X_0(2900)$ is a $I(J^P)=0(0^{+})$ ${\bar{D}}^{\ast }{K}^{\ast }$ hadronic molecule, we extract the whole heavy-quark symmetry multiplet formed by the $\left(\bar{D},{\bar{D}}^{\ast }\right)$ doublet and the $K^{\ast }$ meson. For the bound state case, there would be two additional $I(J^P)=0(1^{+})$ hadronic molecules associated with the $\bar{D}{K}^{\ast }$ and ${\bar{D}}^{\ast }{K}^{\ast }$ channels as well as one additional $I(J^P)=0(2^{+})$ ${\bar{D}}^{\ast }{K}^{\ast }$ molecule. In the light quark limit, they are $36.66\mathrm{MeV}$ and $34.22\mathrm{MeV}$ below the $\bar{D}{K}^{\ast }$ and ${\bar{D}}^{\ast }{K}^{\ast }$ thresholds, respectively, which are unambiguously fixed by the mass position of the $X_0(2900)$. For the virtual state case, there would be one additional $I(J^P)=0(1^{+})$ hadronic molecule strongly coupling to the $\bar{D}{K}^{\ast }$ channel and one additional $I(J^P)=0(2^{+})$ ${\bar{D}}^{\ast }{K}^{\ast }$ molecule. Searching for these heavy quark spin partners will help shed light on the nature of the $X_0(2900)$.

arXiv commentpublished in Chinese Physics C

References in corpus (57)

• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda }_b^0\to J/\psi K^{-}p$ decays
• The $XYZ$ states: experimental and theoretical status and perspectives
• Multiquark Resonances
• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Pentaquark and Tetraquark states
• Heavy-Quark QCD Exotica
• A New Expansion for Nucleon-Nucleon Interactions
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Exotics: Heavy Pentaquarks and Tetraquarks
• Isospin breaking of the narrow charmonium state of Belle at 3872 MeV as a deuson
• Implications of a DK Molecule at 2.32 GeV
• On heavy-light meson resonances and chiral symmetry
• Observed D_s(2317) and tentative D(2100-2300) as the charmed cousins of the light scalar nonet
• Higher Charmonia and X,Y,Z states with Screened Potential
• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
• Consequences of Heavy Quark Symmetries for Hadronic Molecules
• Heavy quark spin structure in Z_b resonances
• Amplitude analysis of the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decay
• Model-independent study of structure in $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decays
• Coupled-channel model for charmonium levels and an option for X(3872)
• Dynamically generated 1^+ heavy mesons
• Radiative transitions from Upsilon(5S) to molecular bottomonium
• A new interpretation for the $D_{s2}^{\ast }(2573)$ and the prediction of novel exotic charmed mesons
• Coupled-Channel and Screening Effects in Charmonium Spectrum
• Dynamical origin and the pole structure of X(3872)
• Subleading contributions to the width of the D_{s0}*(2317)
• $X_0(2866)$ as a $D^{\ast }{\bar{K}}^{\ast }$ molecular state
• Implications of heavy quark spin symmetry on heavy meson hadronic molecules
• Decays of the X(3872) and ${\chi }_{c1}(2P)$ charmonium
• Possible S-wave Bound-States of Two Pseudoscalar Mesons
• Mass of D*_sJ(2317) and Coupled Channel Effect
• $X_0(2900)$ and $X_1(2900)$: hadronic molecules or compact tetraquarks
• Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrisation for line shapes
• Open-charm tetraquark $X_c$ and open-bottom tetraquark $X_b$
• Ambiversion of X(3872)
• The coupled-channel analysis of the D and D_s mesons
• Strong decays of ${\bar{D}}^{\ast }{K}^{\ast }$ molecules and the newly observed $X_{0,1}$ states
• The line shapes of the $Z_b(10610)$ and $Z_b(10650)$ in the elastic and inelastic channels revisited
• A practical parametrization for line shapes of near-threshold states
• X(3872) is not a true molecule
• Open charm and bottom tetraquarks in an extended relativized quark model
• Study of open-charm $0^{+}$ states in unitarized chiral effective theory with one-loop potentials
• Continuum bound states K-long, D_{1}(2420), D_{s1}(2536) and their partners K-short, D_{1}(2400), D*_{sJ}(2463)
• Hadron loops effect on mass shifts of the charmed and charmed-strange spectra
• The BESIII Physics Programme
• Spin partners of the $Z_b(10610)$ and $Z_b(10650)$ revisited
• Delicate interplay between the D0-D*0, rho0-J/psi, and omega-J/psi channels in the X(3872) resonance
• Spin partners $W_{bJ}$ from the line shapes of the $Z_b(10610)$ and $Z_b(10650)$
• Bottomonium-like states: physics case for energy scan above the $B\bar{B}$ threshold at Belle-II
• Spin degeneracy in multi-hadron systems with a heavy quark
• Chiral radiative corrections and D_s(2317)/D(2308) mass puzzle
• Light Quark Spin Symmetry in $Z_b$ Resonances?
• Quasi-bound states in the continuum: a dynamical coupled-channel calculation of axial-vector charmed mesons

Cited by in corpus (37)

• An updated review of the new hadron states
• Hadronic molecules in B decays
• Mass spectrum and strong decays of tetraquark $\bar{c}\bar{s}qq$ states
• New scalar resonance $X_0(2900)$ as a ${\overline{D}}^{\ast }{K}^{\ast }$ molecule: Mass and width
• How to understand the $X(2900)$?
• The $\mathbf{sQ}\bar{\mathbf{q}}\bar{\mathbf{q}}$ $(\mathbf{q}=\mathbf{u},\mathbf{d};\mathbf{Q}=\mathbf{c},\mathbf{b})$ tetraquarks in the chiral quark model
• Excited $K$ meson, $K_c(4180)$, with hidden charm as a $D\bar{D}K$ bound state
• Tetraquarks with open charm favor
• The $T_{c\bar{s}}(2900)$ as a threshold effect from the interaction of the $D^{\ast }{K}^{\ast }$, $D_s^{\ast }\rho$ channels
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Production of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ in $B$ decays as $D^{(\ast )}K$ and $D_s^{(\ast )}\eta$ molecules
• Mass spectra and decays of open-heavy tetraquark states
• On the structures of new scalar resonances $T_{cs0}^a(2900{)}^{++}$ and $T_{cs0}^a(2900{)}^0$
• X_1(2900) as a D_1 K molecule
• Monte-Carlo Based QCD Sum Rules Analysis of $X_0(2900)$ and $X_1(2900)$
• Modeling the resonance $T_{cs0}^a(2900{)}^{++}$ as a hadronic molecule $D^{\ast +}{K}^{\ast +}$
• Spectrum of the molecular tetraquarks: Unraveling the $T_{cs0}(2900)$ and $T_{c\bar{s}0}^a(2900)$
• Analysis of the $T_{c\bar{s}}(2900)$ and related tetraquark states with the QCD sum rules
• Color flux-tube nature of the states $T_{cs}(2900)$ and $T_{c\bar{s}}^a(2900)$
• The ${\bar{B}}^0\to D^{\ast +}{\bar{D}}^{\ast 0}{K}^{-}$ reaction to detect the $I=0,J^P=1^{+}$ partner of the $X_0(2866)$
• Unified description of the $Qs\bar{q}\bar{q}$ molecular bound states, molecular resonances and compact tetraquark states in the quark potential model
• Prediction of possible $D{K}_1$ bound states
• The roles of the $T_{c\bar{s}0}(2900{)}^0$ and $D_0^{\ast }(2300)$ in the process $B^{-}\to D_s^{+}{K}^{-}{\pi }^{-}$
• Magnetic moment of the $X_1(2900)$ state in the diquark-antidiquark picture
• Molecular states of $D^{\ast }{D}^{\ast }{\bar{K}}^{\ast }$ nature
• Looking for the exotic $X_0(2866)$ and its $J^P=1^{+}$ partner in the ${\bar{B}}^0\to D^{(\ast )+}{K}^{-}{K}^{(\ast )0}$ reactions
• Searching for $X_0(2900)$ and $X_1(2900)$ through the kaon induced reactions
• Is the resonance $X_0(2900)$ a ground-state or radially excited scalar tetraquark $[ud][\overline{c}\overline{s}]$?
• Method to observe the $J^P=2^{+}$ partner of the $X_0(2866)$ in the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ reaction
• Possible open charm molecular pentaquarks from ${\Lambda }_c{K}^{(\ast )}/{\Sigma }_c{K}^{(\ast )}$ interactions
• Double pole structures of $X_1(2900)$ as the $P$-wave ${\bar{D}}^{\ast }{K}^{\ast }$ resonances
• Observation of the open-charm tetraquark candidate $T_{cs0}^{\ast }(2870{)}^0$ in the $B^{-}\to D^{-}{D}^0{K}_{\mathrm{S}}^0$ decay
• Theoretical study of the open-flavor tetraquark $T_{c\bar{s}}(2900)$ in the process ${\bar{B}}_s^0\to K^0{D}^0{\pi }^0$
• $D_1(2420)$ and its interactions with a kaon: open charm states with strangeness
• Five-flavor molecular pentaquarks in the ${\Xi }_b^{(\prime ,\ast )}{\bar{D}}^{(\ast )}$ and ${\Xi }_c^{(\prime ,\ast )}{B}^{(\ast )}$ systems
• Investigation of $T_{cs0}^{\ast }(2870{)}^0$ in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the PACIAE model
• Exotic hadrons associated with $b$-quark