THE ROLE OF CP AND T IN HIGH-ENERGY PHYSICS. Phenomenology of CP and T Direct CP Violation Measurements NA48, KTEV T Violation in rare Kaon decays KTEV Direct checks of T Violation CPLEAR Outlook. L.Gatignon / CERN. PHENOMENOLGY OF CP AND T. C: Charge conjugation
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L.Gatignon / CERN
Symposium Marie Curie
C: Charge conjugation
Replace all particles by their anti-particles
Space inversion: x -x
T: Time reversal
Invert the arrow of time t - t
CPT Theorem:within any quantum field theory, all interactions are invariant under the succession of the three operations
C, P and T in any order.
This theorem is based on very general assumptions.
Like r xp
We can now verify the behaviour of these quantities under the operators
In High-Energy physics, direct checks of T-violation
are not so easy to do.
Here we will see 3 approaches:
Parity is violated
But CP transforms a left-handed n into a right-handedn
Is CP conserved ???
This implies also that the matter/anti-matter ratio
increases with time, thus giving a direction to time.