Belle discovers new heavy ‘exotic hadrons’

(PhysOrg.com) — Two unexpected new hadrons containing bottom quarks have been discovered by the Belle Experiment using the High Energy Accelerator Research Organization (KEK)’s B Factory (KEKB), a highly-luminous, electron-positron collider. These new particles have electric charge and are thought to be “exotic” hadrons — non-standard hadrons, containing at least four quarks. Previously, a series of new and unexpected exotic hadrons containing charm and anti-charm quarks have been observed.

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Belle discovers new heavy ‘exotic hadrons’