Spectrum of hadrons with strangeness

Abstract

We describe a calculation of the spectrum of strange and nonstrange hadrons that simultaneously correlates the dressed-quark-core masses of meson and baryon ground- and excited-states within a single framework. The foundation for this analysis is a symmetry-preserving Dyson-Schwinger equation treatment of a vector-vector contact interaction. Our results exemplify and highlight the deep impact of dynamical chiral symmetry breaking on the hadron spectrum: an accurate description of the meson spectrum entails a similarly successful prediction of the spectrum of baryons, including those with strangeness. The analysis also provides numerous insights into baryon structure. For example, that baryon structure is largely flavour-blind, the first radial excitation of ground-state baryons is constituted almost entirely from axial-vector diquark correlations, and DCSB is the foundation for the ordering of low-lying baryon levels; viz., (1/2)^+, (1/2)^+, (1/2)^-.

32 pages, 5 figures, 7 tables

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• Masses of ground and excited-state hadrons
• Perspective on rainbow-ladder truncation
• Hadronic unquenching effects in the quark propagator
• Dynamical chiral symmetry breaking and the fermion--gauge-boson vertex
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• Nucleon axial and pseudoscalar form factors from the covariant Faddeev equation
• Flavour symmetry breaking and meson masses
• Mind the gap
• Expanding the concept of in-hadron condensates
• Hadron Physics and the Dyson--Schwinger Equations of QCD
• Polarized structure functions of nucleons and nuclei
• Current quark mass dependence of nucleon magnetic moments and radii
• Impact of dynamical chiral symmetry breaking on meson structure and interactions

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• Explanation and Prediction of Observables using Continuum Strong QCD
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• Bridging a gap between continuum-QCD and ab initio predictions of hadron observables
• Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction
• The pion: an enigma within the Standard Model
• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Nucleon and $\Delta$ elastic and transition form factors
• Completing the picture of the Roper resonance
• Symmetry preserving truncations of the gap and Bethe-Salpeter equations
• Spectrum of light- and heavy-baryons
• Natural constraints on the gluon-quark vertex
• Masses of ground-state mesons and baryons, including those with heavy quarks
• Photocouplings at the Pole from Pion Photoproduction
• On light baryons and their excitations
• Masses of Light and Heavy Mesons and Baryons: A Unified Picture
• Leading-twist parton distribution amplitudes of S-wave heavy-quarkonia
• Parton distribution amplitudes of light vector mesons
• Nucleon spin structure at very high-x
• Pion distribution amplitude from lattice-QCD
• Three Lectures on Hadron Physics
• Elastic and transition form factors of the Δ(1232)
• From Bethe-Salpeter Wave Functions to Generalised Parton Distributions
• Nucleon tensor charges and electric dipole moments
• Baryon and meson screening masses
• Revealing dressed-quarks via the proton's charge distribution
• Understanding the nucleon as a Borromean bound-state
• Masses of positive- and negative-parity hadron ground-states, including those with heavy quarks
• Structure of the nucleon's low-lying excitations
• Charmonia in a Contact Interaction
• Charmed mesons with a symmetry-preserving contact interaction
• Flavour symmetry breaking in the kaon parton distribution amplitude
• Features and flaws of a contact interaction treatment of the kaon
• Contact-interaction Faddeev equation and, inter alia, proton tensor charges
• Distribution amplitudes of light-quark mesons from lattice QCD
• Contact interaction analysis of pion GTMDs
• Insights into the gamma* N -> Delta transition
• ${\eta }_c$ Elastic and Transition Form Factors: Contact Interaction and Algebraic Model
• Parity partners in the baryon resonance spectrum
• Heavy quarkonia in a contact interaction and an algebraic model: mass spectrum, decay constants, charge radii and elastic and transition form factors
• Dissecting nucleon transition electromagnetic form factors
• Light front distribution of the chiral condensate
• Dressed-quarks and the nucleon's axial charge
• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• Hadronic Observables from Dyson-Schwinger and Bethe-Salpeter equations
• Spectrum and structure of octet and decuplet baryons and their positive-parity excitations
• Dynamical diquarks in the ${\mathbf{\gamma }}^{(\ast )}\mathbf{p}\to \mathbf{N}(1535){\frac{1}{2}}^{-}$ transition
• Zero mode in a strongly coupled quark gluon plasma
• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0{\pi }^{\pm }$-pairs off protons and off neutrons
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Quark anomalous magnetic moment and its effects on the $\rho$ meson properties
• A symmetry preserving contact interaction treatment of the kaon
• Contact interaction analysis of octet baryon axialvector and pseudoscalar form factors
• Electric dipole moment of the rho-meson
• Pion scalar, vector and tensor form factors from a contact interaction
• Progress in the calculation of nucleon transition form factors
• Baryons and the Borromeo
• Color, Flavor, Temperature and Magnetic Field Dependence of QCD Phase Diagram: Magnetic Catalysis and its Inverse
• Light-front Wave Functions of Vector Mesons in an Algebraic Model
• Mass Spectra of One or Two Heavy Quark Mesons and Diquarks within a Nonrelativistic Potential Model
• A contact interaction model for the $\eta$ and ${\eta }^{\prime }$ mesons in a SDE-BSE approach to QCD: masses, decay widths and transition form factors
• Heavy-light mesons spectra in a contact interaction
• Structure of the orbital excited $N^{\ast }$ from the Schwinger-Dyson equations
• The Charm and Beauty of Strong Interactions
• DSE Perspective on QCD Modeling, Distribution Amplitudes, and Form Factors
• Running Masses in the Nucleon and its Resonances
• Chiral Symmetry Restoration and Deconfinement in the Contact Interaction Model of Quarks with a Parallel Electric and Magnetic Fields
• Unified analysis of screening masses for vector and axial-vector mesons and their diquark partners in the Contact Interaction model
• Mesons and Baryons: Parity Partners