Suvarna Garge (Editor)

Upsilon meson

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Composition
  
bb

Symbol
  
ϒ

Discovered
  
E288 experiment

Statistics
  
Bosonic

Antiparticle
  
Self

Upsilon meson

Mass
  
7000946030000000000♠9.46030(26) GeV/c

The Upsilon meson (
ϒ
) is a quarkonium state (i.e. flavourless meson) formed from a bottom quark and its antiparticle. It was discovered by the E288 experiment team, headed by Leon Lederman, at Fermilab in 1977, and was the first particle containing a bottom quark to be discovered because it is the lightest that can be produced without additional massive particles. It has a lifetime of 1.21×10−20 s and a mass about 9.46 GeV/c2 in the ground state.

References

Upsilon meson Wikipedia


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