HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information

# Measurements of branching fractions and CP-violating asymmetries in B meson decays to charmless two-body states containing a $K^0$

Abstract : We present measurements of branching fractions and \CP-violating asymmetries in decays of $B$ mesons to two-body final states containing a \Kz. The results are based on a data sample of approximately 88 million \upsbb decays collected with the \babar detector at the \pep2 asymmetric-energy $B$ Factory at SLAC. We measure $\BR(\Bp\to\Kz\pip) = (22.3 \pm 1.7 \pm 1.1)\times 10^{-6}$, $\BR(\Bz\to\Kz\piz) = (11.4\pm 1.7\pm 0.8)\times 10^{-6}$, $\BR(\Bp\to\Kzb\Kp) < 2.5\times 10^{-6}$, and $\BR(\Bz\to\KzKzb) < 1.8\times 10^{-6}$, where the first uncertainty is statistical and the second is systematic, and the upper limits are at the 90% confidence level. In addition, the following \CP-violating asymmetries have been measured: ${\cal A}_{CP}(\Bp\to\Kz\pip) = -0.05 \pm 0.08 \pm 0.01$ and ${\cal A}_{CP}(\Bz\to\Kz\piz) = 0.03 \pm 0.36\pm 0.11$.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00022145
Contributor : Claudine Bombar Connect in order to contact the contributor
Submitted on : Tuesday, July 27, 2004 - 5:27:40 PM
Last modification on : Tuesday, January 25, 2022 - 12:48:06 PM

### Citation

B. Aubert, R. Barate, D. Boutigny, F. Couderc, J.M. Gaillard, et al.. Measurements of branching fractions and CP-violating asymmetries in B meson decays to charmless two-body states containing a $K^0$. Physical Review Letters, American Physical Society, 2004, 92, pp.201802. ⟨in2p3-00022145⟩

Record views