An observation of direct-CP violation - {epsilon}{prime}{epsilon} result from KTeV

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We report the first KTeV measurement for the search of direct-CP violation by using 23% of the data sample collected in the 1996-97 fixed target run at Fermilab. The result is, Re({epsilon}{prime}/{epsilon}) = (28.0 {+-} 4.1) x 10{sup -4}, nearly 7{delta} above zero obtained by a blind analysis. This firmly establishes the long-sought ''direct-CP violation'' effect in the two-pion system ({pi}{sup +}{pi}{sup -} versus {pi}{sup 0}{pi}{sup 0}) of neutral kaon decays. Other new measurements of {Delta}m, {tau}{sub s}, {Delta}{phi} and a limit on the diurnal variation of {phi}{sub +-} for testing CPT invariance from the same data sample are also ... continued below

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253 Kilobytes pages

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Hsiung, Bob December 14, 1999.

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We report the first KTeV measurement for the search of direct-CP violation by using 23% of the data sample collected in the 1996-97 fixed target run at Fermilab. The result is, Re({epsilon}{prime}/{epsilon}) = (28.0 {+-} 4.1) x 10{sup -4}, nearly 7{delta} above zero obtained by a blind analysis. This firmly establishes the long-sought ''direct-CP violation'' effect in the two-pion system ({pi}{sup +}{pi}{sup -} versus {pi}{sup 0}{pi}{sup 0}) of neutral kaon decays. Other new measurements of {Delta}m, {tau}{sub s}, {Delta}{phi} and a limit on the diurnal variation of {phi}{sub +-} for testing CPT invariance from the same data sample are also presented.

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253 Kilobytes pages

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  • QCD Euroconference 99, Montpellier (FR), 07/07/1999--07/13/1999

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  • Report No.: FERMILAB-Conf-99/338-E
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 15112
  • Archival Resource Key: ark:/67531/metadc625570

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  • December 14, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 1, 2016, 4:25 p.m.

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Hsiung, Bob. An observation of direct-CP violation - {epsilon}{prime}{epsilon} result from KTeV, article, December 14, 1999; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc625570/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.