منابع مشابه
Saturation of low - energy antiproton annihilation on nuclei
Recent measurements of very low-energy (p L < 100 MeV/c) ¯ p annihilation on light nuclei reveal apparent suppression of annihilation upon increasing the atomic charge Z and mass number A. Using ¯ p-nucleus optical potentials V opt , fitted to ¯ p-atom energy-shifts and-widths, we resolve this suppression as due to the strong effective repulsion produced by the very absorptive V opt. The low-en...
متن کاملTheoretical antideuteron-nucleus absorptive cross sections.
Antideuteron-nucleus absorptive cross sections for intermediate to high energies are calculated using an ion-ion optical model. Good agreement with experiment (within 15 percent) is obtained in this same model for mean p-nucleus cross sections at laboratory energies up to 15 GeV. We describe a technique for estimating antinucleus-nucleus cross sections from N mean N data and suggest that furt...
متن کاملN ov 1 99 9 Antiproton annihilation on light nuclei at very low energies
The recent experimental data obtained by the OBELIX group on p̄D and p̄He total annihilation cross sections are analyzed. The combined analysis of these data with existing antiprotonic atom data allows, for the first time, the imaginary parts of the S-wave scattering lengths for the two nuclei to be extracted. The obtained values are: Im a 0 = [−0.62±0.02(stat)±0.04(sys)] fm for p̄D and Im a 0 = [...
متن کامل0 Unified optical - model approach to low - energy antiproton annihilation on nuclei and to antiprotonic atoms
A successful unified description of ¯ p nuclear interactions near E = 0 is achieved using a ¯ p optical potential within a folding model, V opt ∼ ¯ v * ρ, where a ¯ pp potential ¯ v is folded with the nuclear density ρ. The potential ¯ v fits very well the measured ¯ pp annihilation cross sections at low energies (p L < 200 MeV/c) and the 1s and 2p spin-averaged level shifts and widths for the ...
متن کامل/ T 359 , UGI - 99 - 07 On Studying Charm in Nuclei through Antiproton Annihilation
We examine the production of open charm in antiproton annihilation on finite nuclei. The enhancement of the subthreshold production cross section, even in a nucleus as light as carbon, should provide a clean signature of the reduction in the masses of these mesons in-medium. We also show that a careful analysis of the D and D spectra can yield important information on the cross section for DN s...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 1992
ISSN: 0375-9474
DOI: 10.1016/0375-9474(92)90257-k