Elastic scattering, polarization and absorption of relativistic antiprotons on nuclei

Abstract

We perform Glauber model calculations of the antiproton-nucleus elastic and quasielastic scattering and absorption in the beam momentum range $\sim 0.5÷10$ GeV/c. A good agreement of our calculations with available LEAR data and with earlier Glauber model studies of the $\bar{p}A$ elastic scattering allows us to make predictions at the beam momenta of $\sim 10$ GeV/c, i.e. at the regime of the PANDA experiment at FAIR. The comparison with the proton-nucleus elastic scattering cross sections shows that the diffractive minima are much deeper in the $\bar{p}A$ case due to smaller absolute value of the ratio of the real-to-imaginary part of the elementary elastic amplitude. Significant polarization signal for $\bar{p}A$ elastic scattering at 10 GeV/c is expected. We have also revealed a strong dependence of the $\bar{p}A$ absorption cross section on the slope parameter of the transverse momentum dependence of the elementary $\bar{p}N$ amplitude. The $\bar{p}A$ optical potential is discussed.

arXiv comment36 pages, 14 figures, minor revisions, results unchanged, version accepted in Nucl. Phys. A

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• Distillation of scalar exchange by coherent hypernucleus production in antiproton-nucleus collisions
• Color transparency in $\bar{p}d\to {\pi }^{-}{\pi }^{0}p$ reaction
• Review of opportunities at the HESR-Collider with PANDA at FAIR
• Rescattering effects in antiproton-induced exclusive $J/\psi$ and ${\psi }^{\prime }$ production on the deuteron