A model for the mass-number independence of the antiproton annihilation on nuclei at low energies
نویسندگان
چکیده
منابع مشابه
N 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 = [...
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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...
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15 صفحه اول05 v 2 5 N 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 = [...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2001
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)01284-9