CP violating phase difference between B→J/ψKS and J/ψKSπ0 from new physics

The P-wave component of B→J/ψK∗ turns out to be small, hence one can measure sin2β using B0→J/ψK∗0→J/ψKSπ0 as well as B0→J/ψKS. Since these modes are color suppressed, new physics enhanced color dipole bsg coupling, as hinted from the persistent Bs.l. and nC problems and the newly observed large B→η′+Xs decay, may have significant impact. We show that it may lead to a difference in sin2β values between B0→J/ψKS and J/ψKSπ0, measurable at the B Factories in the near future.