Latest experimental information on {epsilon}{prime}/{epsilon}
Conference
·
OSTI ID:760213
- Fermilab
The authors review the latest experimental results in search for direct CP-violation by measuring the CP-violating parameters Re({epsilon}{prime}/{epsilon}) in neutral kaon decays. The recent result from Fermilab-KTeV Re({epsilon}{prime}/{epsilon}) = (28.0 {+-} 4.1) x 10{sup {minus}4}, and the new preliminary result from CERN-NA48 Re({epsilon}{prime}/{epsilon}) = (14.0 {+-} 4.3) x 10{sup {minus}4}, are presented. Both experiments, though using very different techniques, have now performed very well by collecting millions of events for all four relevant decay modes of K{sub L,S} to {pi}{sup +}{pi}{sup {minus}} and {pi}{sup 0}{pi}{sup 0} simultaneously. The current world average on this important measurement is Re({epsilon}{prime}/{epsilon}) = 19.3 {+-} 10{sup {minus}4} with a {chi}{sup 2}/ndf = 11.1/5, establishing the existence of direct CP-violation. The experimental status of such crucial measurements and the future prospects are also discussed here.
- Research Organization:
- Fermi National Accelerator Lab., Batavia, IL (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 760213
- Report Number(s):
- FERMILAB-Conf-00/172-E
- Country of Publication:
- United States
- Language:
- English
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