| Talk | ||||||||||||||||||
| Title | Observation of the weak time’s arrow in B mesons | |||||||||||||||||
| Video |
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| Author(s) | Martinez-Vidal, Fernando (speaker) (IFIC, Universitat de Valencia-CSIC) | |||||||||||||||||
| Corporate author(s) | CERN. Geneva | |||||||||||||||||
| Imprint | 2012-12-18. - Streaming video. | |||||||||||||||||
| Series | (EP Seminar) | |||||||||||||||||
| Lecture note | on 2012-12-18T11:00:00 | |||||||||||||||||
| Subject category | EP Seminar | |||||||||||||||||
| Abstract | The mechanism of CP violation in weak interactions, as arising from the single physical phase in the CKM matrix, has been validated by more than a decade of intense experimental work probing CP violation, particularly with studies with B mesons. Since the Standard Model theory is CPT invariant, it predicts a “weak arrow of time” matching the large observed matter-antimatter asymmetry in B mesons. However, until recently there has been no direct observation of the expected, large time reversal (T) asymmetry. In this seminar we shall discuss how the BABAR experiment at SLAC has conducted a new data analysis where the decays of entangled neutral B mesons allow comparisons between the rates of four different transitions and their inverse, as a function of the time evolution of the B meson. The results lead to the first high significance, direct observation of T non-invariance through the exchange of initial and final states in transitions that can only be connected by a T symmetry transformation. | |||||||||||||||||
| Copyright/License | © 2012-2024 CERN | |||||||||||||||||
| Submitted by | guillaume.unal@cern.ch | |||||||||||||||||
Record created 2012-12-18, last modified 2022-11-02
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