CP asymmetries at D0

Details CP asymmetries at D0 CP asymmetries at D0

2007-10-15

arxiv.org/abs/0710.2851v1

J.Phys.Conf.Ser.110:052023,2008

Physics

High Energy Physics

High Energy Physics - Experiment

contributed paper to EPS07, Manchester, UK, manuscript number EPSHEPP172

Scientific paper

10.1088/1742-6596/110/5/052023

Using two independent measurements of the semileptonic CP asymmetry in the $B_s$ system, we constrain the CP violating phase of the $B_s$ system to be $\phi_s = -0.70^{+0.47}_{-0.39}$. The data sample corresponds to an integrated luminosity of 1.1 fb$^{-1}$ accumulated with D0 detector at the Fermilab Tevatron collider. We also measure the direct CP violating asymmetry in the decay $B^+ \to J/\psi K^+$ to be $A_{CP}(B^+ \to J/\psi K^+) = +0.0067 \pm 0.0074$(stat)$\pm0.0026$(syst). The data corresponds to an integrated luminosity of 1.6 fb$^{-1}$.

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