TADPOLE DIAGRAM,ΔI=1/2 ENHANCEMENT AND ε′/ε

  • The contributions of tadpole diagrams including t and c quark intermediate states to the amplitude of K0→2π and ε′/ε are analysed.The result shows it is quite possible that their contributions are the most important ones.They may give enough ΔI=1/2 enhancement for a reasonable quark relative momentum cutoff value which depends on K0 wave function.However,the calcualation value of │ε′/ε│ is too large if we suppose all CP violation effects come from the,Kobayashi-Maskawa phase δ. Perhaps,One approach to solve this difficulty is to assume the ε comes mainly from superweak CP violation.
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ZHU Zhong-Yuan and ZHANG Bo. TADPOLE DIAGRAM,ΔI=1/2 ENHANCEMENT AND ε′/ε[J]. Chinese Physics C, 1988, 12(1): 50-54.
ZHU Zhong-Yuan and ZHANG Bo. TADPOLE DIAGRAM,ΔI=1/2 ENHANCEMENT AND ε′/ε[J]. Chinese Physics C, 1988, 12(1): 50-54. shu
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Received: 1900-01-01
Revised: 1900-01-01
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TADPOLE DIAGRAM,ΔI=1/2 ENHANCEMENT AND ε′/ε

    Corresponding author: ZHU Zhong-Yuan,
  • Institute of Theoretical Physics,Academia Sinica,Beijing

Abstract: The contributions of tadpole diagrams including t and c quark intermediate states to the amplitude of K0→2π and ε′/ε are analysed.The result shows it is quite possible that their contributions are the most important ones.They may give enough ΔI=1/2 enhancement for a reasonable quark relative momentum cutoff value which depends on K0 wave function.However,the calcualation value of │ε′/ε│ is too large if we suppose all CP violation effects come from the,Kobayashi-Maskawa phase δ. Perhaps,One approach to solve this difficulty is to assume the ε comes mainly from superweak CP violation.

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