Measurements of branching fractions and CP-violating asymmetries in meson decays to charmless two-body states containing a
Collaboration
8 pages
Published in:
- Phys.Rev.Lett. 92 (2004) 201802
e-Print:
- hep-ex/0312055 [hep-ex]
Report number:
- SLAC-PUB-10271,
- BABAR-PUB-03-036
Experiments:
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Citations per year
Abstract:
We present measurements of branching fractions and \CP-violating asymmetries in decays of 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 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.- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
- B: hadronic decay
- final state: (0charm)
- final state: two-particle
- K0
- B+: branching ratio
- B0: branching ratio
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