Speaker
Mr
Kostyantyn Holubyev
(Lancaster University)
Description
We present a search for direct CP violation in $B^{\pm} \to J/\psi K^{\pm}(\pi^{\pm})$ decays.
The event sample is selected from 2.8 fb$^{-1}$ of $p\bar{p}$ collisions
collected by the D0 experiment in Run II of the Fermilab Tevatron Collider.
The charge asymmetry
$A_{CP}(B^+ \to J/\psi K^+) = +0.0075 \pm 0.0061$(stat.)$\pm 0.0027$(syst.)
is obtained using a sample of approximately 40,000
$B^{\pm} \to J/\psi K^{\pm}$ decays.
The achieved precision is of the same level as the expected deviation
predicted by some extensions of the standard model.
We also report the charge asymmetry
$A_{CP}(B^+ \to J/\psi \pi^+) = -0.09 \pm 0.08$(stat.)$\pm 0.03$(syst.).
| Talk, Poster, or Talk & Poster | talk |
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Primary author
Mr
Kostyantyn Holubyev
(Lancaster University)
