Amplitude Analysis of D_{s}
Phys Rev Lett
; 123(11): 112001, 2019 Sep 13.
Article
em En
| MEDLINE
| ID: mdl-31573268
ABSTRACT
We present the first amplitude analysis of the decay D_{s}^{+}âπ^{+}π^{0}η. We use an e^{+}e^{-} collision data sample corresponding to an integrated luminosity of 3.19 fb^{-1} collected with the BESIII detector at a center-of-mass energy of 4.178 GeV. We observe for the first time the W-annihilation dominant decays D_{s}^{+}âa_{0}(980)^{+}π^{0} and D_{s}^{+}âa_{0}(980)^{0}π^{+}. We measure the absolute branching fraction B(D_{s}^{+}âa_{0}(980)^{+(0)}π^{0^{(}+)},a_{0}(980)^{+(0)}âπ^{+(0)}η)=(1.46±0.15_{stat}±0.23_{sys})%, which is larger than the branching fractions of other measured pure W-annihilation decays by at least one order of magnitude. In addition, we measure the branching fraction of D_{s}^{+}âπ^{+}π^{0}η with significantly improved precision.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2019
Tipo de documento:
Article
País de publicação:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA