The Final Measurement of Epsilon'/Epsilon from KTeV

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We present precise measurements of CP and CPT symmetry based on the full dataset of K {yields} {pi}{pi} decays collected by the KTeV experiment at FNAL. We measure the direct CP violation parameter Re({epsilon}{prime}/{epsilon}) = (19.2 {+-} 2.1) x 10{sup -4}. We find the KL-KS mass difference {Delta}m = (5265 {+-} 10) x 10{sup 6} hs{sup -1} and the K{sub S} lifetime {tau}{sub S} = (89.62 {+-} 0.05) x 10{sup -12} s. We test CPT symmetry by finding the phase of the indirect CP violation parameter {epsilon}, {phi}{sub {epsilon}} = (44.09 {+-} 1.00){sup o}, and the difference of the relative ... continued below

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6 pages

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Worcester, E.T. September 1, 2009.

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We present precise measurements of CP and CPT symmetry based on the full dataset of K {yields} {pi}{pi} decays collected by the KTeV experiment at FNAL. We measure the direct CP violation parameter Re({epsilon}{prime}/{epsilon}) = (19.2 {+-} 2.1) x 10{sup -4}. We find the KL-KS mass difference {Delta}m = (5265 {+-} 10) x 10{sup 6} hs{sup -1} and the K{sub S} lifetime {tau}{sub S} = (89.62 {+-} 0.05) x 10{sup -12} s. We test CPT symmetry by finding the phase of the indirect CP violation parameter {epsilon}, {phi}{sub {epsilon}} = (44.09 {+-} 1.00){sup o}, and the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K {yields} {pi}{sup +}{pi}{sup -} ({phi}{sub {+-}}) and for K {yields} {pi}{sup 0}{pi}{sup 0} ({phi}{sub 00}), {Delta}{phi} = (0.29 {+-} 0.31){sup o}. These results are consistent with other experimental results and with CPT symmetry.

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6 pages

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  • Presented at Heavy Quarks and Leptons 2008 (HQ&L08), Melbourne, Australia, 5-9 Jun 2008

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  • Report No.: FERMILAB-CONF-09-430-E
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 964430
  • Archival Resource Key: ark:/67531/metadc928496

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 28, 2016, 3:37 p.m.

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Worcester, E.T. The Final Measurement of Epsilon'/Epsilon from KTeV, article, September 1, 2009; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc928496/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.