  In this letter we reinterpret and reanalyze the available data of the B meson
factories showing the existence of direct experimental evidence of time
reversal invariance violation in B mesons. This reinterpretation consists of
using the available observables to define a new observable which, in a model
independent way and without assuming CPT invariance, compares a transition
between a $B^0$ and a here-defined $B_\alpha$-state, with its time reversed
transition. The observable then offers a direct way to probe time reversal
invariance and it is therefore independent of any conclusion obtained from
current experimental information on CP violation and CPT invariance. As far as
the authors are concerned, this is the first direct evidence of time reversal
invariance violation in B mesons and also the first one obtained from decaying
particles whose mean life time difference is negligible.
