1201.5897 (J. P. Lees et al.)

Study of CP violation in Dalitz-plot analyses of B0 --> K+K-KS, B+ -->
K+K-K+, and B+ --> KSKSK+    [PDF]

J. P. Lees, others

We perform amplitude analyses of the decays $B^0 \rightarrow K^+K^-K^0_S$,
$B^+ \rightarrow K^+K^-K^+$, and $B^+ \rightarrow K^0_S K^0_S K^+$, and measure
CP-violating parameters and partial branching fractions. The results are based
on a data sample of approximately $470\times 10^6$ $B\bar{B}$ decays, collected
with the BABAR detector at the PEP-II asymmetric-energy $B$ factory at the SLAC
National Accelerator Laboratory. For $B^+ \rightarrow K^+K^-K^+$, we find a
direct CP asymmetry in $B^+ \to \phi(1020)K^+$ of $A_{CP}= (12.8\pm 4.4 \pm
1.3)%$, which differs from zero by $2.8 \sigma$. For $B^0 \rightarrow
K^+K^-K^0_S$, we measure the CP-violating phase $\beta_{\rm eff}
(\phi(1020)K^0_S) = (21\pm 6 \pm 2)^\circ$. For $B^+ \rightarrow K^0_S K^0_S
K^+$, we measure an overall direct CP asymmetry of $A_{CP} = (4 ^{+4}_{-5} \pm
2)%$. We also perform an angular-moment analysis of the three channels, and
determine that the $f_X(1500)$ state can be described well by the sum of the
resonances $f_0(1500)$, $f_2^{\prime}(1525)$, and $f_0(1710)$.

View original: http://arxiv.org/abs/1201.5897