# Formation of antihydrogen atoms in an ultra-cold positron-antiproton plasma

Source: [Formation of antihydrogen atoms in an ultra-cold positron-antiproton plasma](<https://www.sota2.com/research/paper/68fa34541e209131ce8983b4>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T20:37:30.765Z

Authors: P. O. Fedichev

Published: 1996-11-06T13:18:32.000Z

## Abstract

We discuss the formation of antihydrogen atoms ($\\bar{\\rm H}$) in an ultra-cold positron-antiproton plasma. For positron densities $n\_p\\agt 10^8$ cm$^{-3}$ the characteristic formation time of stable $\\bar{H}$ is determined by collisional relaxation of highly excited atoms produced in the process of 3-body Thompson recombination. Relying on the mechanisms of \`\`replacement collisions'' and \`\`transverse collisional drift'' we find a bottleneck in the relaxation kinetics and analyze the physical consequences of this phenomenon.

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/physics/9611005>)

[PDF](<https://arxiv.org/pdf/physics/9611005.pdf>)