Measurements of K(L) branching fractions and the CP violation parameter |eta+-|

Alexopoulos, T.

doi:10.1103/PhysRevD.70.092006

Measurements of K(L) branching fractions and the CP violation parameter |eta+-|

Journal Article · Tue Jun 01 04:00:00 EDT 2004 · Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.70.092006· OSTI ID:1862999

Alexopoulos, T.

We present new measurements of the six largest branching fractions of the KL using data collected in 1997 by the KTeV experiment (E832) at Fermilab. The results are B(KL -> pi e nu) = 0.4067 +- 0.0011 B(KL -> pi mu nu) = 0.2701 +- 0.0009 B(KL -> pi+ pi- pi0) = 0.1252 +- 0.0007 B(KL -> pi0 pi0 pi0) = 0.1945 +- 0.0018 B(KL -> pi+ pi-) = (1.975 +- 0.012)E-3, and B(KL -> pi0 pi0) = (0.865 +- 0.010)E-3, where statistical and systematic errors have been summed in quadrature. We also determine the CP violation parameter |eta+-| to be (2.228 +- 0.010)E-3. Several of these results are not in good agreement with averages of previous measurements.

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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:: 1862999

Report Number(s):: FERMILAB-PUB-04-165-E; arXiv:hep-ex/0406002; oai:inspirehep.net:651415

Journal Information:: Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 70

Country of Publication:: United States

Language:: English

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