Speaker
Dr
Giuseppe Finocchiaro
(INFN Laborotorio Nazionale di Frascati)
Description
The B factories have established with great accuracy the violation of the CP symmetry in the B system. However, no direct observation of time-reversal violation had been performed prior to the work, recently published by the BABAR Collaboration, discussed in the present talk. The quantum entanglement of B-Bbar pairs produced in the decay of the Y(4S) resonance at the PEP-II asymmetric B Factory is exploited to perform an unambiguous t-transformation (inversion of the sign of t and exchange of the ``in'' and ``out'' states). The comparison of the decay rates of reference and t-transformed states as a function of the decay time difference allows us to establish for the first time T violation in the B system with a significance of 14 sigma, independently from assumptions on the CPT symmetry.
Author
Dr
Giuseppe Finocchiaro
(INFN Laborotorio Nazionale di Frascati)
