prof. Ludwik Turko

Direct detection of an arrow of time – without CP violation help

Within our Journal Club activity recent result of the BABAR collaboration concerning time-reversal violation will be presented. Time reversal violation was observed till now through observation of CP violation in kaons and B meson decay using the CPT theorem. Recent BABAR study (archive: 1207.5832v3 hep-ex) of B meson decays allows for a direct observation of time-reversal violation without relying on CPT symmetries. This important and basic result is based on the entanglement of B0-antiB0 resulting from Upsilon Y(4s) meson (arxiv: 1203.0171 hep-ph).