Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-11-24
Phys.Rev.D83:071103,2011
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages, 3 figures, submitted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevD.83.071103
We report on a search for CP violation in the decay $ D^\pm \to K^0_{\scriptscriptstyle S} \pi^\pm $ using a data set corresponding to an integrated luminosity of $ 469\,\,fb^{-1} $ collected with the \slshape B\kern-0.1em{\smaller A}\kern-0.1em B\kern-0.1em{\smaller A\kern-0.2em R} detector at the PEP-II asymmetric energy $e^+e^-$ storage rings. The CPviolating decay rate asymmetry $A_{CP}$ is determined to be $(-0.44 \pm 0.13 \mathrm{(stat)} \pm 0.10 \mathrm{(syst)})%$, consistent with zero at 2.7 $\sigma$ and with the standard model prediction of $(-0.332 \pm 0.006)%$. This is currently the most precise measurement of this parameter.
"The BABAR Collaboration
Amo Sanchez del P.
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