Evidence for the η(b)(2S) and observation of h(b)(1P)âη(b)(1S)γ and h(b)(2P)âη(b)(1S)γ.
Phys Rev Lett
; 109(23): 232002, 2012 Dec 07.
Article
em En
| MEDLINE
| ID: mdl-23368184
ABSTRACT
We report the first evidence for the η(b)(2S) using the h(b)(2P)âη(b)(2S)γ transition and the first observation of the h(b)(1P)âη(b)(1S)γ and h(b)(2P)âη(b)(1S)γ transitions. The mass and width of the η(b)(1S) and η(b)(2S) are measured to be m(η(b)(1S))=(9402.4±1.5±1.8) MeV/c(2), m(η(b)(2S))=(9999.0±3.5(-1.9)(+2.8)) MeV/c(2), and Γ(η(b)(1S))=(10.8(-3.7-2.0)(+4.0+4.5)) MeV. We also update the h(b)(1P) and h(b)(2P) mass measurements. We use a 133.4 fb(-1) data sample collected at energies near the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
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Base de dados:
MEDLINE
Assunto principal:
Teoria Quântica
/
Física Nuclear
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article