Meson-Meson interaction in a non-perturbative chiral approach

Abstract

A non-perturbative method which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe the meson-meson interaction up to about 1.2 GeV. The approach uses the O(p^2) and O(p^4) chiral Lagrangians. The seven free parameters of the O(p^4) Lagrangian are fitted to the data. The results are in good agreement with a vast amount of experimental analyses. The amplitudes develop poles in the complex plane corresponding to the f0, a0, rho, K*, phi, sigma and kappa resonances; the latter two, very broad. The total and partial decay widths of the resonances are also well reproduced. Further extensions and applications of this chiral non-perturbative scheme are also discussed.

27 pages, 12 figures. LaTeX, uses psfig

References in corpus (5)

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• Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions
• Effective Field Theory Description of the Pion Form Factor
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• The low lying scalar resonances in the $D^0$ decays into $K_s^0$ and $f_0(500)$, $f_0(980)$, $a_0(980)$
• Clues for the existence of two $K_1(1270)$ resonances
• Final State Interactions in Hadronic D decays
• The $N^{\ast }(1710)$ as a resonance in the $\pi \pi N$ system
• The Mixing Angle of the Lightest Scalar Nonet
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• Exotic baryons from a heavy meson and a nucleon -- Negative parity states --
• Effects of S-wave thresholds
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• Finite volume effects in pion-kaon scattering and reconstruction of the kappa(800) resonance
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• K pi scattering and the K* decay width from lattice QCD
• The $KD$, $\eta D_s$ interaction in finite volume and the nature of the $D_{s^{\ast }0}(2317)$ resonance
• Magnetic moments of the Lambda(1405) and Lambda(1670) resonances
• Dynamical coupled-channel approaches on a momentum lattice
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• Lambda(1405) poles obtained from pi0-Sigma0 photoproduction data
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• Unitary coupled channel analysis of the $\Lambda (1520)$ resonance
• Left Hand Singularities, Hadron Form Factors and the Properties of the Sigma Meson
• Unitary chiral dynamics in J/Psi to VPP decays and the role of scalar mesons
• Investigation of a0-f0 mixing
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• Improved dispersion relations for γγ\to π^0π^0
• Hidden beauty baryon states in the local hidden gauge approach with heavy quark spin symmetry
• Chiral study of the $a_0(980)$ resonance and $\pi \eta$ scattering phase shifts in light of a recent lattice simulation
• Multi-particle systems on the lattice and chiral extrapolations: a brief review
• $a_0(980)$ revisited
• Nucleon resonances $N(1875)$ and $N(2100)$ as strange partners of LHCb pentaquarks
• The pion-kaon scattering amplitude constrained with forward dispersion relations up to 1.6 GeV
• Pseudocalar meson and vector meson interactions and dynamically generated axial-vector mesons
• Study of the $J/\psi \to \varphi (\omega )f_2(1270)$, $J/\psi \to \varphi (\omega )f_2^{\prime }(1525)$ and $J/\psi \to K^{\ast 0}(892){\bar{K}}_2^{\ast 0}(1430)$ decays
• Unitary coupled-channels model for three-mesons decays of heavy mesons
• Chiral Perturbation Theory, the $1/N_c$ expansion and Regge behaviour determine the structure of the lightest scalar meson
• Lattice QCD study of the s-wave $\pi \pi$ scattering lengths in the I=0 and 2 channels
• f0(980) meson as a K bar K molecule in a phenomenological Lagrangian approach
• The Inverse Amplitude Method in $\pi \pi$ Scattering in Chiral Perturbation Theory to Two Loops
• A cross-channel study of pion scattering from lattice QCD
• Investigating the nature of light scalar mesons with semileptonic decays of D mesons
• Dynamical generation and dynamical reconstruction
• LHC sensitivity to the resonance spectrum of a minimal strongly interacting electroweak symmetry breaking sector
• Dynamical generation of pseudoscalar resonances
• The mass spectra and decay properties of dimesonic states, using the Hellmann potential
• Prediction of exotic doubly charmed baryons within chiral effective field theory
• Radiative corrections to WL WL scattering in composite Higgs models
• Searching for signatures around 1920 MeV of a $N^{\ast }$ state of three hadron nature
• Low-lying even parity meson resonances and spin-flavor symmetry
• The kappa in E791 data for D->K-pi-pi
• On the ϕ(1020)f_0(980) S-wave scattering and the Y(2175) resonance
• Can $X(5568)$ be described as a $B_s\pi$, $B\bar{K}$ resonant state?
• The Case of a WW Dynamical Scalar Resonance within a Chiral Effective Description of the Strongly Interacting Higgs Sector
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• Strong and radiative decays of the scalars f0(980) and a0(980) in a hadronic molecule approach
• Chiral Dynamics and S-wave Contributions in Semileptonic B decays
• Effective Restoration of the U_A(1) symmetry in the SU(3) linear sigma model
• The s-sbar and K-Kbar nature of f_0(980) in D_s decays
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• In-medium pi-pi Correlation Induced by Partial Restoration of Chiral Symmetry
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• A search for J^{PC}=1^{-+} exotic mesons in the pi- pi- pi+ and pi- pi0 pi0 systems
• $\eta \to {\pi }^0\gamma \gamma$ decay within unitarized chiral perturbation theory
• Chiral dynamics in U(3) unitary chiral perturbation theory
• Measuring K${}_{\mathrm{S}}^0$K${}^{\pm }$ interactions using Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Finite width effects in ϕradiative decays
• The cusp effect in eta' --> eta pi pi decays
• $K_0^{\ast }(800)$ as a companion pole of $K_0^{\ast }(1430)$
• $f_0(500)$, $f_0(980)$ and $a_0(980)$ production in the ${\chi }_{c1}\to \eta {\pi }^{+}{\pi }^{-}$ reaction
• Charm and hidden charm scalar mesons in the nuclear medium
• The bound state problem of S-wave heavy quark meson-aitimeson systems
• Is the Theta+ a K pi N bound state?
• $K\Lambda (1405)$ configuration of the $K\bar{K}N$ system
• Strange resonance poles from $K\pi$ scattering below 1.8 GeV
• New results from a number operator interpretation of the compositeness of bound and resonant states
• Connecting physical resonant amplitudes and lattice QCD
• The pole structure of the Lambda(1405) in a recent QCD simulation
• Constraint on K Kbar compositeness of the a0(980) and f0(980) resonances from their mixing intensity
• Photoproduction of ${\pi }^{+}{\pi }^{-}$ meson pairs on the proton
• Unitarity and causality constraints in composite Higgs models
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• The small $K\pi$ component in the $K^{\ast }$ wave functions
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• Semileptonic Decays of Charmed Mesons to Light Scalar Mesons
• Effects to Scalar Meson Decays of Strong Mixing between Low and High Mass Scalar Mesons
• On the mass, width and coupling constants of the f0(980)
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• Resonance on top of thresholds: the ${\Lambda }_c(2595{)}^{+}$ as an extremely fine-tuned state
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• New spectrum of negative-parity doubly charmed baryons: Possibility of two quasistable states
• The pion-pion Interaction in the rho Channel in Finite Volume
• Determination of the lightest strange resonance $K_0^{\ast }(700)$ or $\kappa$, from a dispersive data analysis
• Sigma meson in pole-dominated QCD sum rules
• Two dynamical generated $a_0$ resonances by interactions between vector mesons
• A Three-Flavor Chiral Effective Model with Four Baryonic Multiplets within the Mirror Assignment
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• Vacuum fluctuations of \bar{q}q and values of low-energy constants
• Final state interaction and a light mass "exotic" resonance
• Theoretical support for the $\pi (1300)$ and the recently claimed $f_0(1790)$ as molecular resonances
• Unveiling the $K_1(1270)$ double-pole structure in the $\bar{B}\to J/\psi \rho \bar{K}$ and $\bar{B}\to J/\psi {\bar{K}}^{\ast }\pi$ decays
• Review of the low-lying excited baryons ${\Sigma }^{\ast }(1/2^{-})$
• Correlated two-pion exchange and large-N(C) behavior of nuclear forces
• First measurement of direct $f_0(980)$ photoproduction on the proton
• The quadratic scalar radius of the pion and the mixed $\pi -K$ radius
• Finite volume treatment of pi pi scattering and limits to phase shifts extraction from lattice QCD
• Classification of the scalar mesons: a strange pole expedition into charm and beauty territory
• Role of a triangle singularity in the $\pi \Delta$ decay of the $N(1700)(3/2^{-})$
• Abnormal isospin violation and $a_0-f_0$ mixing in the $D_s^{+}\to {\pi }^{+}{\pi }^0{a}_0(980)(f_0(980))$ reactions
• An update on the Kappa
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• Collision times in pi-pi and pi-K scattering and spectroscopy of meson resonances
• Theoretical analysis of the $\gamma \gamma \to {\pi }^0\eta$ process
• Electron-positron annihilation into phi f_{0}(980) and clues for a new 1^{--} resonance
• $I=1/2$ $S$-wave and $P$-wave $K\pi$ scattering and the $\kappa$ and $K^{\ast }$ resonances from lattice QCD
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• The SU(2) and SU(3) chiral phase transitions within Chiral Perturbation Theory
• Chiral Dynamics and S-wave contributions in Semileptonic $D_s/B_s$ decays into ${\pi }^{+}{\pi }^{-}$
• Long distance expansion for the NJL model with SU(3) and U_A(1) breaking
• $\Lambda (1520)$ and $\Sigma (1385)$ in the nuclear medium
• Triangle singularities in $J/\psi \to \eta {\pi }^0\varphi$ and ${\pi }^0{\pi }^0\varphi$
• Determination of the pi Sigma scattering lengths from the weak decays of Lambda_c
• $\eta \to {\pi }^0\gamma \gamma$ decay within a chiral unitary approach revisited
• Scalar Lambda N and Lambda Lambda interaction in a chiral unitary approach
• Elementarity of composite systems
• The [1,2] Padé Amplitudes for $\pi \pi$ Scatterings in Chiral Perturbation Theory
• Renormalization of the 1S0 One-Pion-Exchange NN Interaction in Presence of Derivative Contact Interactions
• The eta-prime -> eta pi pi decay in U(3) chiral perturbation theory
• How to employ ${\bar{B}}_d^0\to J/\psi (\pi \eta ,\bar{K}K)$ decays to extract information on $\pi \eta$ scattering
• Is the $f_0(600)$ meson a dynamically generated resonance? -- a lesson learned from the O(N) model and beyond
• The $K\bar{K}\pi$ decay of the $f_1(1285)$ and its nature as a $K^{\ast }\bar{K}-cc$ molecule
• Chiral loops and VMD in the V->PPgamma decays
• The role of the next-to-leading order triangle-shaped diagram in two-body hadronic decays
• Hadronic three-body D decays mediated by scalar resonances
• Off-shell effects on the interaction of Nambu-Goldstone bosons and $D$ mesons
• Axion-pion thermalization rate in unitarized NLO chiral perturbation theory
• The phi to pi+ pi- decay within a chiral unitary approach
• Implications of chiral symmetry on $S$-wave pionic resonances and the scalar charmed mesons
• ${\chi }_{c0}(1P)$ decay into $\bar{\Sigma }\Sigma \pi$ in search of an $I=1$, $1/2^{-}$ baryon state around $\bar{K}N$ threshold
• Radiative open charm decay of the Y(3940), Z(3930), X(4160) resonances
• Simultaneous Softening of sigma and rho Mesons associated with Chiral Restoration
• Analysis of the scalar nonet mesons with the QCD sum rules
• Meson-meson interactions and Regge propagators
• Scalar resonances in the $D^{+}\to K^{-}{K}^{+}{K}^{+}$ decay
• Introducing tools to test Higgs interactions via $WW$ scattering I: one-loop calculations and renormalization in the HEFT
• A prediction of $D^{\ast }$-multi-$\rho$ states
• The composite nature of the $\Lambda (1520)$ resonance
• Decays of the vector glueball
• Measuring the Relative Strong Phase in $D^0\to K^{\ast +}{K}^{-}$ and $D^0\to K^{\ast -}{K}^{+}$ Decays
• The light scalar mesons within quark models
• A study of $\eta K\bar{K}$ and ${\eta }^{\prime }K\bar{K}$ with the fixed center approximation to Faddeev equations
• Analysis on the composite nature of the light scalar mesons $f_0(980)$ and $a_0(980)$
• Thermal behaviors of light scalar resonances at low temperatures
• Chiral Nonet Mixing in ${\eta }^{\prime }\to \eta \pi \pi$ Decay
• Annihilation contribution and $B\to a_0\pi ,f_{0}K$ decays
• $D{\bar{D}}^{\ast }$ scattering and ${\chi }_{c1}(3872)$ in nuclear matter
• Two-photon decays of pi^0, eta and eta-prime
• $X(3872)$, $X(4014)$, and their bottom partners at finite temperature
• Possible experimental signatures at the LHC of strongly interacting electro-weak symmetry breaking
• Interpretation of $Y(4390)$ as an isoscalar partner of $Z(4430)$ from $D^{\ast }(2010){\bar{D}}_1(2420)$ interaction
• Further study of $f_0(1710)$ with coupled-channel approach and hadron molecular picture
• The phi(1020) a0(980) S-wave scattering and hints for a new vector-isovector resonance
• Vector meson dominance and the rho meson
• Study of the $f_2(1270)$, $f_2^{\prime }(1525)$, ${\bar{K}}_2^{\ast }(1430)$, $f_0(1370)$ and $f_0(1710)$ production from $\psi (nS)$ and ${\rm Y}(nS)$ decays
• Light scalar mesons in $J/psi->$NN$mesonmeson$ decays in a chiral unitary approach
• Unitarized pion-nucleon scattering within Heavy Baryon Chiral Perturbation Theory
• Quark Schwinger-Dyson Evaluation of the l1, l2 Coefficients in the Chiral Lagrangian
• Strategies for an accurate determination of the X(3872) energy from QCD lattice simulations
• Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
• Chiral behavior of vector meson self energies
• Discerning the two $K_1(1270)$ poles in $D^0\to {\pi }^{+}VP$ decay
• Bound states on the lattice with partially twisted boundary conditions
• On the role of meson loops in the $f_0(1710)$ decay into $V\gamma$
• The $DN$, $\pi {\Sigma }_c$ interaction in finite volume and the ${\Lambda }_c(2595)$ resonance
• Predicting the existence of a 2.9 GeV $D{f}_0(980)$ molecular state
• Evaluation of the $\pi \pi$ scattering amplitude in the $\sigma$-channel at finite density
• Photoproduction of scalar mesons on protons and nuclei
• Estimating sigma-meson couplings from D \to 3πdecays
• Chiral Symmetry and light resonances in hot and dense matter
• Final state interactions in the decays J/psi->VPP
• Molecular states of $D^{\ast }{D}^{\ast }{\bar{K}}^{\ast }$ nature
• Interference effects in the decay ϕ\to π^{0}π^{0}γand the coupling constant g_{ϕσγ}
• Interpreting a 2 TeV resonance in WW scattering
• $\theta$-dependence of the lightest meson resonances in QCD
• ${\bar{B}}^0$ decay into $D^0$ and $f_0(500)$, $f_0(980)$, $a_0(980)$, $\rho$ and ${\bar{B}}_s^0$ decay into $D^0$ and $\kappa (800)$, $K^{\ast 0}$
• A new method to study the number of colors in the final-state interactions of hadrons
• The $\sigma K$ coupling in the chiral unitary approach and the isoscalar $\bar{K}N$, $\bar{K}A$ interaction
• Pseudotensor mesons as three-body resonances
• Global parametrizations of $\pi \pi$ scattering with dispersive constraints: Beyond the S0 wave
• On the ${\eta }_1(1855)$, ${\pi }_1(1400)$ and ${\pi }_1(1600)$ as dynamically generated states and their SU(3) partners
• S-wave Meson-Meson Scattering from Unitarized U(3) Chiral Lagrangians
• Probing the substructure of $f_0(1370)$
• Rho meson properties from combining QCD-based models
• $P$-wave charmonium contribution to hidden-charm states from reanalysis of lattice QCD data
• Chiral condensate thermal evolution at finite baryon chemical potential within Chiral Perturbation Theory
• Unveiling the $a_0(1710)$ nature in the process $J/\psi \to {\bar{K}}^0{K}^{+}{\rho }^{-}$
• Hadronic molecules with four charm or beauty quarks
• To understand the rare decay $B_s\to {\pi }^{+}{\pi }^{-}{\ell }^{+}{\ell }^{-}$
• Chiral symmetry constraints on resonant amplitudes
• Upper limit for the cross section of the overlapping scalar resonances f0(980) and a0(980) produced in proton-proton collisions in the range of the reaction threshold
• Role of the triangle mechanism in the ${\Lambda }_b\to {\Lambda }_c{\pi }^{-}{f}_0(980)$ reaction
• Two photon decay of neutral scalars below 1.5 GeV in a chiral model for bar{q}q and bar{q}bar{q}qq states
• K Kbar photoproduction and S-P wave interference
• $\pi \pi$ Invariant mass spectrum in $V^{\prime }\to V\pi \pi$ and the $f_0(600)$ pole
• Masses of Heavy and Light Scalar Tetraquarks in a Non-Relativistic Quark Model
• Proximity of $f_0(1500)$ and $f_0(1710)$ to the scalar glueball
• Searching for exotic states in the $N\pi K$ system
• Shedding light on the $X(3930)$ and $X(3960)$ states with the $B^{-}\to K^{-}J/\psi \omega$ reaction
• Synchonisation of Resonances with Thresholds
• Scalar and axial-vector mesons
• Generalized linear sigma model with two glueballs
• Description of $\rho (1700)$ as a $\rho K\bar{K}$ system with the fixed center approximation
• Chiral Unitary Dynamics of Hadrons and Hadrons in a Nuclear Medium
• Renormalization of the f0(980) and a0(980) scalar resonances in a nuclear medium
• The molecular nature of some exotic hadrons
• Density of States of a Coupled-Channel System
• Determination of the compositeness of resonances from decays: the case of the $B_s^0\to J/\psi f_1(1285)$
• Preliminary lattice study of the I=1 $K\bar{K}$ scattering length
• Pole trajectories of the $\Lambda (1405)$ helps establish its dynamical nature
• Relativistic Friedrichs-Lee model and quark-pair creation model
• Composite and elementary nature of a resonance in the sigma model
• Hadronic molecular states with the quark contents $bc\bar{s}\bar{q}$, $b\bar{c}s\bar{q}$, and $b\bar{c}\bar{s}q$
• The bottomed strange molecules with isospin 0
• Decay of vector-vector resonances into $\gamma$ and a pseudoscalar meson
• Constituent and current quark masses at low chiral energies
• $J/\psi \to \gamma \pi \pi$, $\gamma {\pi }^0\eta$ reactions and the $f_0(980)$ and $a_0(980)$ resonances
• Cross sections for inelastic meson-meson scattering via quark-antiquark annihilation
• Chiral Nonet Mixing in $\pi K$ Scattering
• Compositeness of hadron resonances in finite volume
• Estimating transport coefficients of interacting pion gas with K-matrix cross sections
• Two pion mediated scalar isoscalar NN interaction in the nuclear medium
• Comment on Intrinsic and dynamically generated scalar meson states
• Cross sections for inelastic meson-meson scattering
• Study of a possible S=+1 dynamically generated baryonic resonance
• Production of pentaquarks with hidden charm and double strangeness in ${\Xi }_b$ and ${\Omega }_b$ decays
• The scalar-isovector sector in the extended Linear Sigma Model
• On coupled-channel dynamics in the presence of anomalous thresholds
• Spinless mesons and glueballs mixing patterns in SU(3) flavor limit
• Roles of the scalar $f_0(500)$ and $f_0(980)$ in the process $D^0\to {\pi }^0{\pi }^0{\bar{K}}^0$
• Degeneracy patterns of chiral companions at finite temperature
• On ambiguities of sign determination of the S-matrix from energy levels in a finite box
• Light Meson Masses using AdS/QCD modified Soft Wall Model
• Quark and glue spectroscopy of scalars and pseudoscalars in SU(3) flavor limit
• The $D{\bar{D}}^{\ast }$ interaction with isospin zero in an extended hidden gauge symmetry approach
• Cross sections for 2-to-1 meson-meson scattering
• The $\rho NN$ coupling with direct coupling and loops
• Low-mass enhancement of kaon pairs in $B^{+}\to {\bar{D}}^{(\ast )0}{K}^{+}{\bar{K}}^0$ and $B^0\to D^{(\ast )-}{K}^{+}{\bar{K}}^0$ decays
• Is there an isovector companion of the X(2175)?
• Photoproduction of $f_0(980)$ and $f_0(1500)$ resonances off a proton target
• Unitarization Technics in Hadron Physics with Historical Remarks
• Dynamical Generation of Hyperon Resonances
• Looking for bound states and resonances in the ${\eta }^{\prime }K\bar{K}$ system
• A Calculation of the Physical Mass of Sigma Meson
• Double strangeness pentaquarks and other exotic hadrons in the ${\Xi }_b\to \Xi J/\Psi \varphi$ decay
• Chiral Nonet Mixing in $\pi \eta$ Scattering
• Remarks on the amplitude of the decay Upsilon(3S) -> Upsilon(1S) pi pi
• Photoproduction of the scalar mesons $f_0(500)$ and $f_0(980)$ off the nucleon
• $\bar{K}$ induced formation of the $f_0(980)$ and $a_0(980)$ resonances on proton targets
• Inelastic Meson-Meson Scattering in Hadronic Matter
• Unitarizing non-relativistic Coulomb scattering
• Kaon-antikaon nuclear optical potentials and the kappa meson in the nuclear medium
• Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach
• On the Determination of Elastic and Inelastic Nuclear Observables from Lattice QCD
• Quark mass dependence of the low-lying charmed mesons at one loop in HH$\chi$PT
• Charge asymmetries in e+e- -> pi+ pi- gamma at the phi resonance
• Unitarization and low-energy scattering data
• Structure of $\Lambda$(1405) resonance and $\gamma p\to K^{+}+(\pi \Sigma {)}^0$ reaction
• Chiral unitary approach to hadron spectroscopy
• Novel nonperturbative approach for radiative ${\bar{B}}^0({\bar{B}}_s^0)\to J/\psi \gamma$ decays
• The role of triangle singularity in the decay process $D^0\to {\pi }^{+}{\pi }^{-}{f}_0(980),f_0\to {\pi }^{+}{\pi }^{-}$
• The $({\pi }^{-},\gamma \gamma )$ reaction in nuclei and the $\sigma$ meson in the medium
• Impact of unitarization on the $J/\psi$-light meson cross section
• Dynamical generation of hadronic resonances
• States generated in the $K$-multi-$\rho$ interactions
• Sigma meson mass and width at finite density
• Role of scalar dibaryon and $f_0(500)$ in the isovector channel of low-energy neutron-proton scattering
• Polarized $p{K}^{-}$ scattering in Unitary Baryon Chiral Perturbation Theory
• Unitarity and Unitarization
• Determining Compositeness of Hadronic Resonances: the $\Lambda (1405)$ Radiative Decay and the $a_0(980)$-$f_0(980)$ Mixing
• Scalar isovector resonance photoproduction through the final state meson-meson interactions
• Introducing tools to test Higgs interactions via $WW$ scattering II: the coupled channel formalism and scalar resonances
• Quarkonium interactions with (hot) hadronic matter
• The theoretical study of $D_s^{+}\to {\pi }^{+}{\pi }^0{\pi }^0$
• The $Z_{cs}$ states and the mixture of hadronic molecule and diquark-anti-diquark components within effective field theory
• Cross sections for 2-to-3 meson-meson scattering
• Study of conventional and non-conventional scalar and vector mesons
• The pseudoscalar meson and baryon octet interaction with strangeness $S=-2$ in the unitary coupled-channel approximation
• Reaction pp -> pp πππas a background for hadronic decays of the eta-prime meson
• From QCD to Physical Resonances
• Pion production in nonequilibrium Chiral perturbation Theory
• $\Lambda (1405)$ and $\bar{\Lambda }(1405)$ in $J/\psi$ four-body decays
• A note on the tensor and vector exchange contributions to $K\bar{K}\to K\bar{K},D\bar{D}\to D\bar{D}$ and ${\pi }^{+}{\pi }^{-}\to {\pi }^{+}{\pi }^{-}$ reactions
• $N_C$ evolution of the light meson resonances
• Role of the strange quark in the rho(770) meson
• Dynamical generation of hadronic resonances in effective models with derivative interactions
• Investigating the two-pion exchange of the double charm $D{D}^{\ast }$ chiral interactions and $T_{cc}$
• A Non-Perturbative Chiral Approach for Meson-Meson Interactions
• Recent Developments in Chiral Unitary Dynamics of Resonances
• Precision dispersive approaches versus unitarized Chiral Perturbation Theory for the lightest scalar resonances $\sigma /f_0(500)$ and $\kappa /K_0^{\ast }(700)$
• A study of the resonances $K_0^{\ast }(800)$ and $K_0^{\ast }(1430)$
• Proposal to detect a moving triangle singularity in $\psi (2S)\to {\pi }^{+}{\pi }^{-}{K}^{+}{K}^{-}$ process
• The dynamically generated $h_1$ state by the $K^{\ast }{\bar{K}}^{\ast }$ interaction and its $K_1(1270)\bar{K}$ and $b_1(1235)\pi$ decays
• Origin of resonances in chiral dynamics
• $a_0(980)$ as a companion pole of $a_0(1450)$
• Strong interaction between kaons in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma