Abstract
The first measurement of CP asymmetries in the decay \( {B}_s^0\to J/\psi {\overline{\mathrm{K}}}^{\ast }{(892)}^0 \) and an updated measurement of its branching fraction and polarisation fractions are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. Together with constraints from B 0 → J/ψ ρ 0, the results are used to constrain additional contributions due to penguin diagrams in the CP -violating phase ϕ s , measured through B 0 s decays to charmonium.
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The LHCb collaboration., Aaij, R., Adeva, B. et al. Measurement of CP violation parameters and polarisation fractions in \( {\mathrm{B}}_{\mathrm{s}}^0\to \mathrm{J}/\psi {\overline{\mathrm{K}}}^{\ast 0} \) decays. J. High Energ. Phys. 2015, 82 (2015). https://doi.org/10.1007/JHEP11(2015)082
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DOI: https://doi.org/10.1007/JHEP11(2015)082