PoS - Proceedings of Science
Volume 129 - The 13th International Conference on B-Physics at Hadron Machines (BEAUTY 2011) - Main session
Time-dependent angular analysis of $B^0_s \rightarrow J/\psi \phi$ events at LHCb
U. Uwer
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Published on: October 10, 2011
The determination of the CP-violating phase $\phi_s$ in $B^0_s \to J/\psi\phi$ decays through a time dependent angular analysis is one of the key goals of the LHCb experiment. Here, the first LHCb measurement of the mixing phase $\phi$s using a data sample corresponding to 36 pb$^{−1}$ of proton-proton collision taken in 2010 at a center-of-mass energy of 7 GeV is presented. The analysis of (860 $\pm$ 60) selected $B^0_s \to J/\psi\phi$ candidates constrains $\phi_s$ to $−2.7 < \phi_s < −0.5$ at 68% CL.
DOI: https://doi.org/10.22323/1.129.0051
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