dorsal/arxiv
View SchemaAntiproton-Hydrogen annihilation at sub-kelvin temperatures
| Authors | A. Yu. Voronin, J. Carbonell |
|---|---|
| Categories | |
| ArXiv ID | physics/9805033 |
| URL | https://arxiv.org/abs/physics/9805033 |
| DOI | 10.1103/PhysRevA.57.4335 |
| Journal | Physical Review A, vol.57 n.5 (1998) |
Abstract
The main properties of the interaction of ultra low-energy antiprotons ($% E\le10^{-6}$ a.u.) with atomic hydrogen are established. They include the elastic and inelastic cross sections and Protonium (Pn) formation spectrum. The inverse Auger process ($Pn+e \to H+\bar{p}$) is taken into account in the framework of an unitary coupled-channels model. The annihilation cross-section is found to be several times smaller than the predictions made by the black sphere absorption models. A family of $\bar{p}H$ nearthreshold metastable states is predicited. The dependence of Protonium formation probability on the position of such nearthreshold S-matrix singularities is analysed. An estimation for the $H\bar{H}$ annihilation cross section is obtained.
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"abstract": "The main properties of the interaction of ultra low-energy antiprotons ($%\nE\\le10^{-6}$ a.u.) with atomic hydrogen are established. They include the\nelastic and inelastic cross sections and Protonium (Pn) formation spectrum. The\ninverse Auger process ($Pn+e \\to H+\\bar{p}$) is taken into account in the\nframework of an unitary coupled-channels model. The annihilation cross-section\nis found to be several times smaller than the predictions made by the black\nsphere absorption models. A family of $\\bar{p}H$ nearthreshold metastable\nstates is predicited. The dependence of Protonium formation probability on the\nposition of such nearthreshold S-matrix singularities is analysed. An\nestimation for the $H\\bar{H}$ annihilation cross section is obtained.",
"arxiv_id": "physics/9805033",
"authors": [
"A. Yu. Voronin",
"J. Carbonell"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.57.4335",
"journal_ref": "Physical Review A, vol.57 n.5 (1998)",
"title": "Antiproton-Hydrogen annihilation at sub-kelvin temperatures",
"url": "https://arxiv.org/abs/physics/9805033"
},
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