Determination of the η'-nucleus optical potential

Abstract

The excitation function and momentum distribution of ${\eta }^{\prime }$ mesons have been measured in photon induced reactions on ${}^{12}$C in the energy range of 1250-2600 MeV. The experiment was performed with tagged photon beams from the ELSA electron accelerator using the Crystal Barrel and TAPS detectors. The data are compared to model calculations to extract information on the sign and magnitude of the real part of the ${\eta }^{\prime }$-nucleus potential. Within the model, the comparison indicates an attractive potential of -($37\pm 10(stat)\pm 10(syst)$) MeV depth at normal nuclear matter density. Since the modulus of this depth is larger than the modulus of the imaginary part of the ${\eta }^{\prime }$-nucleus potential of -($10\pm 2.5$) MeV, determined by transparency ratio measurements, a search for resolved ${\eta }^{\prime }$-bound states appears promising.

13 pages, 6 figures

References in corpus (5)

• Measurement of the beam asymmetry in eta-photoproduction off the proton
• η- and η'-mesic nuclei and U_A(1) anomaly at finite density
• Formation of eta-prime(958)-mesic nuclei by (p,d) reaction
• Feasibility Study of Observing eta' Mesic Nuclei with (p,d) Reaction
• ${\eta }^{\prime }$ meson under partial restoration of chiral symmetry in nuclear medium

Cited by in corpus (47)

• Meson-nucleus potentials and the search for meson-nucleus bound states
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Determination of the eta'-proton scattering length in free space
• Measurement of excitation spectra in the ${}^{12}$C$(p,d)$ reaction near the ${\eta }^{\prime }$ emission threshold
• In-medium Eta-Nucleon interactions and Eta nuclear bound states
• 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
• Momentum dependence of the imaginary part of the $\omega$- and ${\eta }^{\prime }$-nucleus optical potential
• QCD symmetries in eta and etaprime mesic nuclei
• Scatter fraction of the J-PET tomography scanner
• Proton-${\eta }^{\prime }$ interactions at threshold
• Search for ${\eta }^{\prime }$ bound nuclei in the ${}^{12}\mathrm{C}(\gamma ,p)$ reaction with simultaneous detection of decay products
• Experimental constraints on the $\omega$-nucleus real potential
• The η'-carbon potential at low meson momenta
• Overview of the software architecture and data flow for the J-PET tomography device
• Overview of the software architecture and data flow for the J-PET tomography device
• Comprehensive study of mass modifications of light mesons in nuclear matter in the three-flavor extended Linear Sigma Model
• Few-body aspects of the near threshold pseudoscalar meson production
• 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
• Spectroscopy of ${\eta }^{\prime }$-nucleus bound states at GSI and FAIR --- very preliminary results and future prospects ---
• Structure of eta' mesonic nuclei in a relativistic mean field theory
• Search for the manifestation of the mesic-nuclei on the dd-->3HeNpi excitation function measured with WASA-at-COSY
• Study of the N N eta' production with COSY-11
• Near-threshold J/Psi production in proton-nucleus collisions
• Luminosity determination for the deutron-deutron reactions using free and quasi-free reactions with WASA-at-COSY detector
• On the determination of the $D$ meson width in the nuclear medium with the transparency ratio
• Theoretical study of photoproduction of ${\eta }^{\prime }N$ bound state on deuteron target with forward proton emission
• Study of in-medium ${\eta }^{\prime }$ properties in the ($\gamma$, ${\eta }^{\prime }p$) reaction on nuclei
• Search for the eta-mesic Helium bound state with the WASA-at-COSY facility
• Antikaon-induced $K_1(1270{)}^{+}$ meson production on nuclei near threshold
• Formation of eta'(958) bound states by (gamma, d) reaction
• Medium effects in antikaon-induced ${\Xi }^{-}$ hyperon production on nuclei near threshold
• Effect of the final state interaction of ${\eta }^{\prime }N$ on the ${\eta }^{\prime }$ photoproduction off nucleon
• Possible ${\eta }^{\prime }d$ bound state and its $s$-channel formation in the $\gamma d\to \eta d$ reaction
• Formation of eta'(958) Meson Bound States by the 6Li(gamma,d) reaction
• Near-threshold ${\eta }^{\prime }$ meson production in ${\pi }^{-}A$ reactions
• Revisiting ${\eta }^{\prime }(958)$ nuclear states
• Search for Pentaquark Theta+ in Hadronic Reaction at J-PARC
• QCD symmetries and the eta and etaprime in nuclei
• Search for the 4He-eta bound state in dd->(4He-eta)_{bound}->3He n pi0 and dd->(4He-eta)_{bound}->3He p pi- reactions with the WASA-at-COSY facility
• Close to threshold eta' meson production in proton-proton collisions at COSY-11
• Lifetime of the eta' meson at low temperature
• Direct measurement of the in-medium ${\eta }^{\prime }$ mass spectrum through the $\gamma \gamma$ decay channel
• Backward-angle electroproduction of ${\eta }^{\prime }$ mesons off protons at $W=2.13\text{GeV}$ and $Q^2=0.46{\left(\text{GeV}/c\right)}^2$
• Populating Low-Spin States in Radioactive Nuclei to Measure Magnetic Moments Using the Transient Field Technique