Comments on CP, T and CPT violation in neutral kaon decays

Ellis, John R.; Mavromatos, N.E.

doi:10.1016/S0370-1573(99)00058-7

Comments on CP, T and CPT violation in neutral kaon decays

John R. Ellis
(
- CERN
)
,
N.E. Mavromatos
(
- CERN and
- Oxford U.
)

Mar, 1999

20 pages

Published in:

Phys.Rept. 320 (1999) 341-354

e-Print:

hep-ph/9903386 [hep-ph]

DOI:

10.1016/S0370-1573(99)00058-7

Report number:

CERN-TH-99-60,
OUTP-99-17-P

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Abstract:

We comment on CP, T and CPT violation in the light of interesting new data from the CPLEAR and KTeV Collaborations on neutral kaon decay asymmetries. Other recent data from the CPLEAR experiment, constraining possible violations of CPT and the

\Delta S = \Delta Q

rule, exclude the possibility that the semileptonic-decay asymmetry

A_{T}

measured by CPLEAR could be solely due to CPT violation, confirming that their data constitute direct evidence for T violation. The CP-violating asymmetry in

K_L \to e^-e^+\pi^-\pi^+

recently measured by the KTeV Collaboration does not by itself provide direct evidence for T violation, but we use it to place new bounds on CPT violation.

Note:

Contribution to the Festschrift for L.B. Okun, to appear in a special issue of Physics Reports, eds. V.L. Telegdi and K. Winter •
20 pages LaTeX, Contribution to the Festschrift for L.B. Okun, to appear in a special issue of Physics Reports, eds. V.L. Telegdi and K. Winter Report-no: CERN-TH/99-60, OUTP-99-17P

CP: violation
time reversal: violation
violation: CPT
anti-p p: annihilation
K0: hadroproduction
anti-K0: hadroproduction
K0: semileptonic decay
anti-K0: semileptonic decay
cross section: asymmetry
time dependence

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