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Discrete Symmetries and CP ViolationFrom Experiment to Theory$
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Marco Sozzi

Print publication date: 2007

Print ISBN-13: 9780199296668

Published to Oxford Scholarship Online: January 2008

DOI: 10.1093/acprof:oso/9780199296668.001.0001

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CHARGE CONJUGATION

CHARGE CONJUGATION

Chapter:
(p.88) 3 CHARGE CONJUGATION
Source:
Discrete Symmetries and CP Violation
Author(s):

M. S. Sozzi

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199296668.003.0003

This chapter discusses charge conjugation symmetry, which emerges naturally out of the mating of quantum theory to special relativity, with the antiparticle concept. Despite not being related to space-time, this symmetry turns out to be closely linked to space-time inversions; its consequences are somewhat less widespread than those of parity symmetry, mainly because only neutral systems can be eigenstates of charge conjugation. Charge conjugation symmetry is maximally violated by weak interactions in a way that is closely linked to parity violation. The large violation of parity and charge conjugation symmetries in weak interactions, the intrinsic difficulties in experimenting with composite antimatter systems, and the fact that CPT symmetry constrains several properties of matter and antimatter to be equal, all contribute to the fact that investigations shifted towards the study of the combined symmetry CP instead. A list of further reading and a selection of exercise problems are presented at the end of the chapter.

Keywords:   charge conjugation symmetry, charge conjugation transformation, charge conjugation violation, special relativity, space-time, parity symmetry, CPT symmetry

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