The Gold plated mode revisited: Sin(2 beta) and B0 ---> J / Psi K(S) in the standard model

We study the corrections to the determination of sin(2 beta) from the time dependent CP asymmetry of B^0 to J/Psi K_S which arise in the standard model. Although a precise prediction of these corrections is not possible we find that they are indeed extremely small, of the order of less than a per mil of the observed value. This means in turn that any deviation visible at the B factories will be a clear signal for new physics.

11.30.Er
13.25.Hw
12.38.Cy
14.40.Nd
B0: hadronic decay
J/psi(3100)
CP: violation
time dependence
effective Hamiltonian
B0 anti-B0: mixing angle

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Figures(0)

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