Test of T violation in neutral B decays

T violation should be tested independently of CP violation. Besides K system, B meson decays provide another good place to study T violation. In the Standard Model, T violation in B0⇌B0̄ oscillation is expected to be small. The angular distribution of B→VV decay permits one to extract the T-odd correlation. In the absence of final state interaction, T violation in B→J/ψ(l+l−)K∗(KSπ0) decay can reach 4−7% via B0−B0̄ mixing.