(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. This latest discovery from Belle demonstrates the existence of exotic hadrons containing at least four quarks in a particle system including bottom quarks .
in PhysOrg (follow the link to read entire article)The Belle experiment conducts collisions between electrons and positrons.
Highlights of the Belle experiment so far include
- the first observation of CP-violation outside of the kaon system (2001)
- observation of: and
- measurement of ϕ3 using the Dalitz plot
- measurement of the CKM quark mixing matrix elements | Vub | and | Vcb |
- observation of direct CP-violation in and
- observation of transitions
- evidence for
- observations of a number of new particles including the X(3872)
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