Origin of resonances in the chiral unitary approach

Abstract

We study the origin of the resonances associated with pole singularities of the scattering amplitude in the chiral unitary approach. We propose a "natural renormalization" scheme using the low-energy interaction and the general principle of the scattering theory. We develop a method to distinguish dynamically generated resonances from genuine quark states [Castillejo-Dalitz-Dyson (CDD) poles] using the natural renormalization scheme and phenomenological fitting. Analyzing physical meson-baryon scatterings, we find that the Lambda(1405) resonance is largely dominated by the meson-baryon molecule component. In contrast, the N(1535) resonance requires a sizable CDD pole contribution, while the effect of the meson-baryon dynamics is also important.

RevTeX4, 14 pages, 4 figures, 4 tables, title changed by editors, final version to appear in Phys. Rev. C

References in corpus (10)

• Dynamically Generated Open and Hidden Charm Meson Systems
• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
• Effective Kbar N interaction based on chiral SU(3) dynamics
• On the Strangeness -1 S-wave Meson-Baryon Scattering
• Transition form factors of the N*(1535) as a dynamically generated resonance
• Study of exotic hadrons in S-wave scatterings induced by chiral interaction in the flavor symmetric limit
• Structure of the Lambda(1405) baryon resonance from its large Nc behavior
• Exotic hadrons in s-wave chiral dynamics
• How and when can one identify hadronic molecules in the baryon spectrum
• Study of exotic hadrons in s-wave chiral dynamics

Cited by in corpus (49)

• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Heavy quark spin symmetric molecular states from ${\bar{D}}^{(\ast )}{\Sigma }_c^{(\ast )}$ and other coupled channels in the light of the recent LHCb pentaquarks
• Hidden gauge formalism for the radiative decays of axial-vector mesons
• Isospin breaking effects in the X(3872) resonance
• The s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry
• Comprehensive analysis of the wave function of a hadronic resonance and its compositeness
• Hidden charm N and Delta resonances with heavy-quark symmetry
• Kaonic production of Lambda(1405) off deuteron target in chiral dynamics
• K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation
• Odd parity bottom-flavored baryon resonances
• Interaction of vector mesons with baryons and nuclei
• anti-K anti-K N molecule state in three-body calculation
• Structure of the $\mathbf{\Lambda }(1405)$ from Hamiltonian effective field theory
• Electromagnetic mean squared radii of Lambda(1405) in chiral dynamics
• On the nature of the $\Lambda (1405)$ and $\Lambda (1670)$ from their $N_c$ behavior in chiral dynamics
• Generalized weak-binding relations of compositeness in effective field theory
• Formation of eta-mesic nuclei by (pi,N) reaction and N^*(1535) in medium
• Determination of the ${\mathbf{\eta }}^3\mathrm{He}$ threshold structure from the low energy $\mathbf{pd}\to {\mathbf{\eta }}^3\mathrm{He}$ reaction
• Electromagnetic Transition Form Factors of Baryon Resonances
• Lambda(1405)-induced non-mesonic decay in kaonic nuclei
• Mixing of pseudoscalar-baryon and vector-baryon in the $J^P=1/2^{-}$ sector and the $N^{\ast }$(1535) and $N^{\ast }$(1650) resonances
• Plausible explanation of the ${\Delta }_{5/2^{+}}(2000)$ puzzle
• Open charm meson in nuclear matter at finite temperature beyond the zero range approximation
• Valence quark and meson cloud contributions for the gamma* Lambda -> Lambda* and gamma* Sigma0 -> Lambda* reactions
• Kaon induced Lambda(1405) production on a deuteron target at DAFNE
• Role of the $N^{\ast }$(1535) in the $J/\psi \to \bar{p}\eta p$ and $J/\psi \to \bar{p}{K}^{+}\Lambda$ reactions
• Nature of the sigma meson as revealed by its softening process
• The nature of Lambda(1405) hyperon resonance in chiral dynamics
• Formation spectra of light kaonic nuclei by in-flight ($\bar{K},N$) reactions with chiral unitary amplitude
• Elementarity of composite systems
• New insights into the nature of the $\Lambda (1380)$ and $\Lambda (1405)$ resonances away from the SU(3) limit
• The investigations of the $P$-wave $B_s$ states combining quark model and lattice QCD in the coupled channel framework
• ${\eta }^{\prime }$ meson under partial restoration of chiral symmetry in nuclear medium
• Pole trajectories of the $\Lambda (1405)$ helps establish its dynamical nature
• Is two-poles' $\Lambda (1405)$ one state or two?
• Recent developments in antikaon-nucleon dynamics
• Nature of excited $\Xi$ baryons with threshold effects
• Study of the resonance contributions in the ${\Xi }_b^{-}\to p{K}^{-}{K}^{-}$ decay
• Looking for bound states and resonances in the ${\eta }^{\prime }K\bar{K}$ system
• Systematic study of hadronic excitation energy using Schottky anomaly
• Reanalysis of lattice QCD spectra leading to the $D_{s0}^{\ast }(2317)$ and $D_{s1}^{\ast }(2460)$
• The structure of N(1535) in the aspect of chiral symmetry
• Search for the low-lying excited baryon ${\Sigma }^{\ast }(1/2^{-})$ through process ${\Lambda }_c^{+}\to \Lambda K^0{\pi }^{+}$
• Interactions of the Pseudoscalar Meson Octet and the Baryon Decuplet in the Continuum and a Finite Volume
• Probing the isospin structure and low-lying resonances in ${\Lambda }_c^{+}\to n{\bar{K}}^0{\pi }^{+}$ decays
• Interaction of vector mesons with baryons and vectors in the nuclear medium
• Chiral dynamics and baryon resonances
• Compositness and wave function of shallow bound states in relation to scattering observables
• Understanding the 1P- and 2S-wave nucleon resonances within the extended Lee-Friedrichs Model