Observation of direct CP violation in $K_{S,L} \to \pi \pi$ decays

Alavi-Harati, A.

doi:10.1103/PhysRevLett.83.22

Observation of direct CP violation in $$K_{S,L} \to \pi \pi$$ decays

Journal Article · Sat May 01 04:00:00 EDT 1999 · Phys.Rev.Lett.

DOI:https://doi.org/10.1103/PhysRevLett.83.22· OSTI ID:1847840

Alavi-Harati, A.

We have compared the decay rates of K_L and K_S to \pi^+ \pi^- and \pi^0 \pi^0 final states using a subset of the data from the KTeV experiment (E832) at Fermilab. We find that the direct-CP-violation parameter Re(\epsilon'/\epsilon) is equal to (28.0 \pm 3.0 (stat) \pm 2.8 (syst)) \times 10^{-4}. This result definitively establishes the existence of CP violation in a decay process.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: KTeV

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1847840

Report Number(s):: EFI-99-25; FERMILAB-PUB-99-150-E; arXiv:hep-ex/9905060; oai:inspirehep.net:500819

Journal Information:: Phys.Rev.Lett., Journal Name: Phys.Rev.Lett. Vol. 83

Country of Publication:: United States

Language:: English

References (14)

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