Bottom eta meson

Bottom eta meson (
η
_b)
Composition	; b; ; b;
Statistics	Bosonic
Family	Mesons
Interactions	Strong, weak, electromagnetic, gravity
Symbol	; η; b
Antiparticle	Self
Discovered	SLAC (2008)
Types	1
Mass	9388.9+3.1; −2.3 MeV/c2
Electric charge	0 e
Spin	0
Isospin	0
Hypercharge	0
Parity	-1
C parity	+1

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.

References

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. S2CID 17291017.
Godfrey, S. (2008). "Searching high and low for bottomonium". Physics. Vol. 1. p. 11. Bibcode:2008PhyOJ...1...11G. doi:10.1103/Physics.1.11.

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Composition	b b
Statistics	Bosonic
Family	Mesons
Interactions	Strong, weak, electromagnetic, gravity
Symbol	η _b
Antiparticle	Self
Discovered	SLAC (2008)
Types	1
Mass	9388.9+3.1 −2.3 MeV/c²
Electric charge	0 e
Spin	0
Isospin	0
Hypercharge	0
Parity	-1
C parity	+1

See also

References