Observation of e+e- â π+π-π(0)(χbJ) and Search for X(b) â ωÏ(1S) at sqrt[s] = 10.867 GeV.
Phys Rev Lett
; 113(14): 142001, 2014 Oct 03.
Article
em En
| MEDLINE
| ID: mdl-25325633
ABSTRACT
The e(+)e(-) â π(+)π(-)π(0)χ(bJ) (J = 0,1,2) processes are studied using a 118 fb(-1) data sample acquired with the Belle detector at a center-of-mass energy of 10.867 GeV. Unambiguous π(+)π(-)π(0)χ(bJ) (J = 1,2), ωχ(b1) signals are observed, and indication for ωχ(b2) is seen, both for the first time, and the corresponding cross section measurements are presented. No significant π(+)π(-)π(0)χ(b0) or ωχ(b0) signals are observed, and 90% confidence level upper limits on the cross sections for these two processes are obtained. In the π(+)π(-)π(0) invariant mass spectrum, significant non-ω signals are also observed. We search for the X(3872)-like state (named X(b)) decaying into ωÏ(1S); no significant signal is observed with a mass between 10.55 and 10.65 GeV/c(2).
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article