Symmetries in particle physics
Symmetries in particle physics
Symmetries in particle physics
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Discrete symmetries:<br />
Some examples<br />
Charge conjugation, parity, time reversal<br />
In addition to cont<strong>in</strong>uous symmetries, which can<br />
reflect properties of space-time (like, e.g. under<br />
rotations, boosts, etc.) or of dynamics (gauge<br />
symmetries), there may also be discrete symmetries.<br />
Most important examples:<br />
Charge conjugation: ALL charges (electric, colour, etc.)<br />
are <strong>in</strong>verted. Operator for that:<br />
Parity: Move from a left-handed coord<strong>in</strong>ate system to a<br />
right-handed one (mirror). Realised through<br />
Time reversal: Invert time axis, operator:
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