Eta bound states in nuclei: a probe of flavour-singlet dynamics

Abstract

We argue that eta bound states in nuclei are sensitive to the singlet component in the eta. The bigger the singlet component, the more attraction and the greater the binding. Thus, measurements of eta bound states will yield new information about axial U(1) dynamics and glue in mesons. Eta - etaprime mixing plays an important role in understanding the value of the eta-nucleon scattering length.

8 pages, version to appear in PLB

References in corpus (10)

• The Spin Structure of the Proton
• Roper Resonance and S_{11}(1535) from Lattice QCD
• Experimental study of pp eta dynamics in the pp --> ppeta reaction
• Formation of η'(958)-mesic nuclei and axial U_A(1) anomaly at finite density
• eta-Nucleon Scattering Length and Effective Range uncertainties
• Formation of mesic nuclei by (γ,p) reactions
• Excited nucleons with chirally improved fermions
• eta-Nucleus interactions and in-medium properties of N*(1535) in chiral models
• Study of the $\eta \pi$ and ${\eta }^{\prime }\pi$ spectra and interpetation of possible exotic $J^{PC}=1^{-+}$ mesons
• Gluon field distribution in baryons

Cited by in corpus (56)

• Measurement of the dp -->3He eta reaction near threshold
• Meson-nucleus potentials and the search for meson-nucleus bound states
• Binding of Hypernuclei in the Latest Quark-Meson Coupling Model
• η- and η'-mesic nuclei and U_A(1) anomaly at finite density
• Nuclear-bound quarkonia and heavy-flavor hadrons
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Formation of eta-prime(958)-mesic nuclei by (p,d) reaction
• Eta-nuclear bound states revisited
• Determination of the eta'-proton scattering length in free space
• In medium eta' mass and eta' N interaction based on chiral effective theory
• Measurement of excitation spectra in the ${}^{12}$C$(p,d)$ reaction near the ${\eta }^{\prime }$ emission threshold
• Interaction of eta mesons with nuclei
• How the axial anomaly controls flavor mixing among mesons
• Search for eta-mesic 4He in the dd->3He n pi0 and dd->3He p pi- reactions with the WASA-at-COSY facility
• Determination of the real part of the η'-Nb optical potential
• Missing-mass spectroscopy of the ${}^{12}\mathrm{C}(p,d)$ reaction near the ${\eta }^{\prime }$-meson production threshold
• Strong and radiative decays of excited vector mesons and predictions for a new $\varphi (1930)$ resonance
• U_A(1) Anomaly in Hot and Dense QCD and the Critical Surface
• Parameter Optimisation for the Latest Quark-Meson Coupling Energy Density Functional
• Influence of the axial anomaly on the decay $N(1535)\to N\eta$
• Search for He-eta bound states with the WASA-at-COSY facility
• Constraining the optical potential in the search for eta-mesic 4He
• ${\eta }_c$-nucleus bound states
• Comprehensive study of mass modifications of light mesons in nuclear matter in the three-flavor extended Linear Sigma Model
• Momentum distribution of N${}^{\ast }$ in nuclei
• \boldmath{${\rm Y}$} and \boldmath{${\eta }_b$} mass shifts in nuclear matter
• Photoproduction of hypernuclei within the quark-meson coupling model
• Production of cascade hypernuclei via the (K-,K+) reaction within a quark-meson coupling model
• Resonance-like structure near the $\eta d$ threshold in the $\gamma d${$\to$}${\pi }^0\eta d$ reaction
• Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV
• Few-body aspects of the near threshold pseudoscalar meson production
• MESON2016 -- Concluding Remarks
• Search for the $\eta$ mesic ${}^3$He in the $pd\to dp{\pi }^0$ reaction with the WASA-at-COSY facility
• $\eta$ and ${\eta }^{\prime }$ mesons in nuclear matter and nuclei
• Search for eta mesic 3He with the WASA-at-COSY facility in the pd-> 3He 2gamma and pd-> 3He 6gamma reactions
• The ${\eta }^{\prime }N$ interaction from a chiral effective model and ${\eta }^{\prime }$-$N$ bound state
• Structure of eta' mesonic nuclei in a relativistic mean field theory
• Spectroscopy of ${\eta }^{\prime }$-nucleus bound states at GSI and FAIR --- very preliminary results and future prospects ---
• Spectral function of the ${\eta }^{\prime }$ meson in nuclear medium based on phenomenological models
• Search for the manifestation of the mesic-nuclei on the dd-->3HeNpi excitation function measured with WASA-at-COSY
• Coherent photoproduction of the neutral pion and eta meson on the deuteron at incident energies below 1.15 GeV
• Study of the N N eta' production with COSY-11
• Luminosity determination for the proton-deuteron reaction using pd -> 3He eta channel with WASA-at-COSY detector
• Upper limit of the total cross section for the pn --> pn eta' reaction
• Lambda beta-decay in-medium
• Theoretical study of photoproduction of ${\eta }^{\prime }N$ bound state on deuteron target with forward proton emission
• Search for the eta-mesic Helium bound state with the WASA-at-COSY facility
• Study of in-medium ${\eta }^{\prime }$ properties in the ($\gamma$, ${\eta }^{\prime }p$) reaction on nuclei
• Possible ${\eta }^{\prime }d$ bound state and its $s$-channel formation in the $\gamma d\to \eta d$ reaction
• Status of the search for $\eta$-mesic nuclei with particular focus on $\eta$-Helium bound states
• Effect of the final state interaction of ${\eta }^{\prime }N$ on the ${\eta }^{\prime }$ photoproduction off nucleon
• Study of conventional and non-conventional scalar and vector mesons
• QCD symmetries and the eta and etaprime in nuclei
• Close to threshold eta' meson production in proton-proton collisions at COSY-11
• Direct measurement of the in-medium ${\eta }^{\prime }$ mass spectrum through the $\gamma \gamma$ decay channel
• Lifetime of the eta' meson at low temperature