Those are hypothetical cp odd scalar particles\, whose mass is protect ed by shift symmetries \, causing them to remain naturally light and to hav e suppressed couplings to ordinary matter. Cpviolation cpv was discovered in 1964 in the weak decays of neutral kaons. From experiment to theory the investigation of discrete symmetries is a fascinating subject which. These symmetries are broken for weak interactions only.
Bona flavour physics amd cp violation lecture 1 27 the symmetry cpt is conserved in the standard model. The other symmetries introduced here are broken by some amount. This symmetry breaking is understood in the standard model as a consequence. Operational discrete symmetries and cpviolation core. Download citation discrete symmetries and cp violation.
Discrete symmetries and cp violation request pdf researchgate. The investigation of discrete symmetries is a fascinating subject which has been central to the agenda of physics research for fifty years, and has been the target of many experiments, ongoing and. In the chosen basis one is easily convinced that cp may be violated spontaneously by the relative geometrical phases of the higgs vevsandof types ii iii in 2. Discrete flavour symmetries, neutrino mixing and leptonic. Cp and other symmetries of symmetries andreas trautner.
The book discusses discrete symmetries parity, charge conjugation, time reversal, and of course cp symmetry in microscopic atomic, nuclear, and particle. As the source of cp violation we identify quadratic and cubic couplings of the higgs potential after the ssb. Discrete symmetries and cp violation paperback marco sozzi. Request pdf on jun 1, 20, david bailin and others published discrete symmetries and cp violation find, read and cite all the research you need on. Now, the strong cp problem, which is the main focus of chapter 4, is rather of the opposite nature to cp violation in the electroweak sector. The probab ly bestknown instance are axions\, advocated to solve the strong cp probl em. The presence of cp violating physical phases which are independent of couplings and calculable as a consequence of the assumed symmetries is called geometrical cp violation 2. Cp violation will be discussed in detail in the next lecture 14. Petcov1,2,a 1 sissainfn, via bonomea 265, 346 trieste, italy. Lecture discrete symmetries p, c, and t parity p charge conjugation c time reversal t cp violation p and c violation in weak decays tests of cpt invariance 1. The investigation of discrete symmetries is a fascinating subject which has been central to the agenda of physics research for 50 years, and has. Therefore, not allowing for an enhancement of the discrete symmetry. Cp violation in qcd, axions and possible connections to.
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