Bottom eta meson

Summary

The bottom eta meson (
η
b
) or eta-b meson is a flavourless meson formed from a bottom quark and its antiparticle. It was first observed by the BaBar experiment at SLAC in 2008, and is the lightest particle containing a bottom and anti-bottom quark.

Bottom eta meson (
η
b
)
Composition
b

b
StatisticsBosonic
FamilyMesons
InteractionsStrong, weak, electromagnetic, gravity
Symbol
η
b
AntiparticleSelf
DiscoveredSLAC (2008)
Types1
Mass9388.9+3.1
−2.3
 MeV/c2
Electric charge0 e
Spin0
Isospin0
Hypercharge0
Parity-1
C parity+1

See alsoEdit

ReferencesEdit

  1. Aubert, B.; et al. (2008). "Observation of the Bottomonium Ground State in the Decay
    ϒ
    (3S)→
    γ

    η
    b
    ". Physical Review Letters. 101 (7): 071801. arXiv:0807.1086. Bibcode:2008PhRvL.101g1801A. doi:10.1103/PhysRevLett.101.071801. PMID 18764521.
  2. Godfrey, S. (2008). "Searching high and low for bottomonium". Physics. Vol. 1. p. 11. Bibcode:2008PhyOJ...1...11G. doi:10.1103/Physics.1.11.