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Measurement of the asymmetry in the decay Ω̄+→Λ̄K+→p̄π+K+

  • L. C. Lu*
  • , R. A. Burnstein
  • , A. Chakravorty
  • , Y. C. Chen
  • , W. S. Choong
  • , K. Clark
  • , E. C. Dukes
  • , C. Durandet
  • , J. Felix
  • , Y. Fu
  • , G. Gidal
  • , H. R. Gustafson
  • , T. Holmstrom
  • , M. Huang
  • , C. James
  • , C. M. Jenkins
  • , T. D. Jones
  • , D. M. Kaplan
  • , M. J. Longo
  • , W. Luebke
  • K. B. Luk, K. S. Nelson, H. K. Park, J. P. Perroud, D. Rajaram, H. A. Rubin, J. Volk, C. G. White, S. L. White, P. Zyla
*Corresponding author for this work

Research output: Contribution to journalJournal Articlepeer-review

Abstract

The asymmetry in the p̄ angular distribution in the sequential decay Ω̄+→Λ̄K+→p̄π+K+ has been measured to be ᾱΩᾱΛ=[+1.16±0.18(stat)±0. 17(syst)]×10-2 using 1.89×106 unpolarized Ω̄+ decays recorded by the HyperCP (E871) experiment at Fermilab. Using the known value of αΛ, and assuming that ᾱΛ=-αΛ, ᾱΩ=[-1.81±0.28(stat)±0.26(syst)]×10-2. A comparison between this measurement of ᾱΩᾱΛ and recent measurements of αΩαΛ made by HyperCP shows no evidence of a violation of CP symmetry.

Original languageEnglish
Article number242001
JournalPhysical Review Letters
Volume96
Issue number24
DOIs
Publication statusPublished - 2006
Externally publishedYes

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