Photoproduction of ${\eta }^{\prime }$ mesons off nuclei and their properties in the nuclear medium

Abstract

We study the photoproduction of ${\eta }^{\prime }$ mesons from nuclei near the threshold within the collision model based on the nuclear spectral function. The model takes properly into account both primary photon-nucleon and secondary pion-nucleon ${\eta }^{\prime }$ production processes as well as the effect of the nuclear ${\eta }^{\prime }$ mean-field potential on these processes. We find that the secondary pion-induced reaction channel $\pi N\to {\eta }^{\prime }N$ plays an insignificant role in the ${\eta }^{\prime }$ photoproduction off nuclei. We calculate the transparency ratio for $et{a}^{\prime }$ mesons and compare it to the available experimental data. The comparison indicates an inelastic ${\eta }^{\prime }N$ cross section of the order of 6-10 mb. We show that the existing transparency ratio measurements do not allow one to distinguish between two adopted ${\eta }^{\prime }$ in-medium modification scenarios. Our studies also demonstrate that the momentum distribution and excitation function for ${\eta }^{\prime }$ production in $\gamma A$ reactions reveal some sensitivity to these scenarios, which means that such observables may be an important tool to get a valuable information on the ${\eta }^{\prime }$ in-medium properties.

17 pages

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Cited by in corpus (16)

• Meson-nucleus potentials and the search for meson-nucleus bound states
• Determination of the η'-nucleus optical potential
• Determination of the real part of the η'-Nb optical potential
• Momentum dependence of the imaginary part of the $\omega$- and ${\eta }^{\prime }$-nucleus optical potential
• Search for ${\eta }^{\prime }$ bound nuclei in the ${}^{12}\mathrm{C}(\gamma ,p)$ reaction with simultaneous detection of decay products
• The η'-carbon potential at low meson momenta
• Testing the $\varphi$-nuclear potential in pion-induced $\varphi$ meson production on nuclei near threshold
• Near-threshold J/Psi production in proton-nucleus collisions
• Probing the structure of $X(3872)$ in photoproduction
• Medium effects in antikaon-induced ${\Xi }^{-}$ hyperon production on nuclei near threshold
• Near-threshold ${\eta }^{\prime }$ meson production in ${\pi }^{-}A$ reactions
• Transparency of the $\gamma (n,p){\pi }^{-}$ reaction in nuclei
• Momentum dependence of near-threshold photoproduction of ${\Xi }^{-}$ hyperons off nuclei and their properties in the nuclear medium
• Nuclear effects on the $\rho$ meson produced in the inclusive photonuclear reaction
• Forward coherent $\omega$ and $\varphi$ mesons production in the photon induced reaction on nuclei
• Absorption of $\psi (2S)$ mesons in nuclei