Search for CP Violation in the Decays ${D^{\pm} \to K^0_{\scriptscriptstyle S} K^\pm$, ${D_s^{\pm} \to K^0_{\scriptscriptstyle S} K^\pm$, and ${D_s^{\pm} \to K^0_{\scriptscriptstyle S} π^\pm$

Riccardo Cenci

paper

Search for CP Violation in the Decays ${D^{\pm} \to K^0_{\scriptscriptstyle S} K^\pm$, ${D_s^{\pm} \to K^0_{\scriptscriptstyle S} K^\pm$, and ${D_s^{\pm} \to K^0_{\scriptscriptstyle S} π^\pm$

arXiv:1209.0138

Abstract

We report on a search for CP violation in the decays K^0_{\scriptscriptstyle S} K^\pm $,$ {D_s^{\pm} \to K^0_{\scriptscriptstyle S} K^\pm $, an d$ {D_s^{\pm} \to K^0_{\scriptscriptstyle S} π^\pm $u s in g a d a t a se t cor r es p o n d in g t o anin t e g r a t e d l u min os i t y o f$ 469\,\invfb$ collected with the BaBar detector at the PEP-II asymmetric energy \epem storage rings. The CP-violating decay rate asymmetries $A_{CP} $a r e d e t er min e d t o b e$ (+0.13 \pm 0.36 \stat \pm 0.25 \syst)% $,$ (-0.05 \pm 0.23 \stat \pm 0.24 \syst)% $, an d$ (+0.6 \pm 2.0 \stat \pm 0.3 \syst)%$, respectively for the three modes, before correction for the relevant K^0_{\scriptscriptstyle S} asymmetry. After this correction, all the measurements are consistent with zero within one standard deviation. These are currently the most precise measurements of these asymmetries.

To appear in the proceedings of The 5th International Workshop on Charm Physics (Charm 2012)