# CP asymmetries at D0

Source: [CP asymmetries at D0](<https://www.sota2.com/research/paper/68fa23212c2a376019392f53>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-28T13:52:23.732Z

Authors: K. Holubyev

Published: 2007-10-15T15:44:11.000Z

## Abstract

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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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/0710.2851>)

[PDF](<https://arxiv.org/pdf/0710.2851.pdf>)