Evidence for the suppressed decay B(-)âDK(-), DâK(+)π(-).
Phys Rev Lett
; 106(23): 231803, 2011 Jun 10.
Article
em En
| MEDLINE
| ID: mdl-21770499
ABSTRACT
The suppressed decay chain B(-)âDK(-), DâK(+)π(-), where D indicates a D(¯)(0) or D(0) state, provides important information on the CP-violating angle Ï(3). We measure the ratio R(DK) of the decay rates to the favored mode B(-)âDK(-), DâK(-)π(+) to be R(DK)=[1.63(-0.41)(+0.44)(stat)(-0.13)(+0.07)(syst)]×10(-2), which indicates the first evidence of the signal with a significance of 4.1σ. We also measure the asymmetry A(DK) between the charge-conjugate decays to be A(DK)=-0.39(-0.28)(+0.26)(stat)(-0.03)(+0.04)(syst). The results are based on the full 772×10(6) BB(¯) pair data sample collected at the Υ(4S) resonance with the Belle detector.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article