CP Violation : Past , Present
نویسنده
چکیده
CP symmetry and its violation are important guides to fundamental quark properties and to the understanding of the matter-antimatter asymmetry of the Universe. In this review, an updated version of one presented earlier in the year [1], we describe past, present, and future aspects of CP violation studies. After an illustration of fundamental iscrete symmetries in Maxwell's equations (Sec. II), we recall the history of CP violation's discovery [2] in the decays of neutral kaons (Sec. III). The product CPT so far seems to be conserved, as is expected in local Lorentz-invariant quantum eld theories [3]. We then discuss the electroweak theory's explanation of CP violation [4] in terms of phases of the Cabibbo-Kobayashi-Maskawa (CKM) [4, 5] matrix in Sec. IV), and mention some present tests of this theory with kaons (Sec. V) B mesons (Sec. VI), and charmed particles (Sec. VII). The future of CP violation studies (Sec. VIII) is very rich, with a wide variety of experiments relevant to physics beyond the Standard Model and the baryon asymmetry of the Universe.
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