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ALICE finds first ever evidence of the antimatter partner of hyperhelium-4

The finding also represents the first evidence of the heaviest antimatter hypernucleus yet at the LHC Illustration of the production of antihyperhelium-4 (a bound state of two antiprotons, an antineutron and an antilambda) in lead–lead collisions. (Image: Janik Ditzel for the ALICE collaboration) Collisions between heavy ions at the Large Hadron Collider (LHC) create quark–gluon plasma, a hot and dense state of matter that is thought to have filled the Universe around one millionth of a second a...

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