Pentaquarks: scientists find new “exotic” configurations of quarks
They hope they will help us understand the “strong force” that holds the insides of atoms together. …
Some of these may have a less fleeting existence – perhaps a hundred billionth of a second. That is brief by human standards, but because these particles travel at close to the speed of light, they would leave trails a few millimetres long, which would be a treasured footprint for physicist sleuths to follow.
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