# Search for CP violation using $T$-odd correlations in $D^+\rightarrow K^+K^0_S\pi^+\pi^-$ and $D_s^+\rightarrow K^+ K^0_S\pi^+\pi^-$ decays

Abstract : We search for CP violation in a sample of 20,000 Cabibbo-suppressed decays, $D^+\rightarrow K^+K^0_S\pi^+\pi^-$, and 30,000 Cabibbo-favored decays, $D_s^+\rightarrow K^+K^0_S\pi^+\pi^-$. We use 520 $fb^{-1}$ of data recorded by the BaBar detector at the PEP-II asymmetric-energy $e^+e^-$ collider operating at center of mass energies near 10.6 $GeV$. We search for CP violation in the difference between the $T$-odd asymmetries obtained using triple product correlations of the $D^+$ ($D_s^+$) and $D^-$ ($D_s^-$) decays, respectively. The $T$ violation parameter values obtained are $\mathcal{A}_T(D^+) = (-12.0 \pm 10.0_{stat} \pm 4.6_{syst})\times 10^{-3}$ and $\mathcal{A}_T(D_s^+) = (-13.6 \pm 7.7_{stat} \pm 3.4_{syst}) \times10^{-3}$, which are consistent with the Standard Model expectations.
Type de document :
Article dans une revue
Physical Review D, American Physical Society, 2011, 84, pp.031103. 〈10.1103/PhysRevD.84.031103〉
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http://hal.in2p3.fr/in2p3-00595433
Contributeur : Claudine Bombar <>
Soumis le : mardi 24 mai 2011 - 17:26:55
Dernière modification le : jeudi 7 février 2019 - 14:57:53

### Citation

J.P. Lees, V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, et al.. Search for CP violation using $T$-odd correlations in $D^+\rightarrow K^+K^0_S\pi^+\pi^-$ and $D_s^+\rightarrow K^+ K^0_S\pi^+\pi^-$ decays. Physical Review D, American Physical Society, 2011, 84, pp.031103. 〈10.1103/PhysRevD.84.031103〉. 〈in2p3-00595433〉

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