And if not, what prevents us? Is there a mathematical equation describing the loss rate?

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    $\begingroup$ How long were LEP runs? Based on the data I found around 2-3 hours... so that's already a lot longer than for anti-hydrogen. See figure 3 in "A Brief History of the LEP Collider" Ralph Aßmann, Mike Lamont and Steve Myers a for the LEP team. $\endgroup$ – CuriousOne Jul 5 '15 at 7:52
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    $\begingroup$ I'm voting to close this question because it is about a 'world record' in physics and not physics. $\endgroup$ – Kyle Kanos Jul 5 '15 at 11:25
  • $\begingroup$ I'm not looking for a world record per se. I'm just curious about for how long it's possible to store positrons. $\endgroup$ – Kimmo Rouvari Jul 5 '15 at 12:02
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    $\begingroup$ I guess it's going to depend on the quality of your vacuum. Also, if you can keep accelerating them they go too fast to annihilate even if they do occasionally interact. I suspect that the answer will be shorter for low energy positrons - although their low velocity may keep them from "finding" other particles, other particles will still find them - and they will annihilate when that happens. $\endgroup$ – Floris Jul 6 '15 at 2:25
  • $\begingroup$ @KyleKanos, achievements in experimental physics are certainly part of physics and they are of interest to people visiting this site. Calling them "world records" in derogatory sense does not contribute. $\endgroup$ – Ján Lalinský Jul 13 '15 at 7:02

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