The Effect of Penguins in the Bd to J/psi K0 CP asymmetry
M. Ciuchini, M. Pierini, L. Silvestrini
Abstract
Performing a fit to the available experimental data, we quantify the effect of long-distance contributions from penguin contractions in B0 to J/psi K0 decays. We estimate the deviation of the measured SCP term of the time-dependent CP asymmetry from sin(2 beta) induced by these contributions and by the penguin operators. We find Delta S = 0.000 +- 0.012 ([-0.025,0.024] @ 95% probability).
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