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Constraints on the new particle in Σ → p μμ

Constraints on the new particle in Σ → p μμ. Yu-Kuo Hsiao With the collaborator C.Q. Geng National Tsing-Huang University, Taiwan Based on ph/0509175, to appear in PLB. Experiment Constraints from other modes Summary Comparison. New particles with different masses?.

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Constraints on the new particle in Σ → p μμ

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  1. Constraints on the new particle in Σ→ pμμ Yu-Kuo Hsiao With the collaborator C.Q. Geng National Tsing-Huang University, Taiwan Based on ph/0509175, to appear in PLB. • Experiment • Constraints from other modes • Summary • Comparison

  2. New particles with different masses? • Dark matter particle with mass of (ph/0508572) • Axion-like particle with mass of 0.7 meV-2 meV from PVLAS Collaboration. (ex/0507107) • A light scalar boson of mass 1-10 MeV, accounting for the fluxes of 511 keV gamma ray.(PLB 624, 162) • Intermediate boson with mass of 214.3 MeV from HyperCP Collaboration. (PRL94, 021801)

  3. Experiment

  4. The effective Hamiltonian

  5. The Amplitude

  6. The form factors

  7. The Form Factors

  8. Constraints from K→ πμμ

  9. Constraints from KL→μμ

  10. Constraints from KL→μμ

  11. The models?

  12. The models?

  13. Comparison

  14. Summary

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