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CP Violation by A. I. Sanda, I. I. Bigi

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22

Summary and perspectives

The discovery that the weak forces break previously unquestioned discrete symmetries – first parity P and charge conjugation C, then CP and T – had a revolutionizing impact on our perception of nature and how we analyse the elements of its grand design. We realized that symmetries should not be taken for granted; some even began questioning that sacrosanct fruit of quantum field theory, CPT invariance. We learnt from the violation of CP symmetry – not from that of P and C separately – that left and right or positive and negative charge are dynamically distinct rather than being mere labels based on a convention; furthermore that nature distinguishes between past and future even on the microscopic level. From 1964 to ...

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