Observation of the eta(c)(2S) in Exclusive B-->KK(S)K-pi(+) Decays.
Phys Rev Lett
; 89(10): 102001, 2002 Sep 02.
Article
em En
| MEDLINE
| ID: mdl-12225186
ABSTRACT
We report the observation of a narrow peak in the K(S)K-pi(+) invariant mass distribution in a sample of exclusive B-->KK(S)K-pi(+) decays collected with the Belle detector at the KEKB asymmetric e(+)e(-) collider. The measured mass of the peak is M=3654+/-6(stat)+/-8(syst) MeV/c(2), and we place a 90% confidence level upper limit on the width of Gamma<55 MeV/c(2). The properties agree with heavy-quark potential model expectations for the eta(c)(2S) meson, the n=2 singlet S charmonium state.
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MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2002
Tipo de documento:
Article