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arXiv · 1011.5477

Search for CP Violation in the Decay D+/- -> Ks pi+/-

The BABAR Collaboration·P. del Amo Sanchez
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Abstract

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.

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The BABAR Collaboration, P. del Amo Sanchez. 2010-11-24. Search for CP Violation in the Decay D+/- -> Ks pi+/-. https://doi.org/10.1103/physrevd.83.071103

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