Angular Distribution of Process e+e→τ+τ→a1υτ,a1→ρπ and Characteristics of a1 Meson

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Yu Hong, Shen Qixing and Zhang Lin. Angular Distribution of Process e+e→τ+τ→a1υτ,a1→ρπ and Characteristics of a1 Meson[J]. Chinese Physics C, 1994, 18(7): 583-590.
Yu Hong, Shen Qixing and Zhang Lin. Angular Distribution of Process e+e→τ+τ→a1υτ,a1→ρπ and Characteristics of a1 Meson[J]. Chinese Physics C, 1994, 18(7): 583-590. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Angular Distribution of Process e+e→τ+τ→a1υτ,a1→ρπ and Characteristics of a1 Meson

    Corresponding author: Yu Hong,
  • Institute of High Energy Physics,Academia Sinica,Beijing 100039

Abstract: The density matrix and helicity formalism of angular distribution of process e+e→τ+τ→a1υτ,a1→ρπ have been obtained. The helicity amplitude ratios corresponding to the form factors of the W-a1 transition and the strong interaction vertex a1ρπ are determined by the sectionalized fitting method. A model-independent method for determining the mass and width of the wide resonance a1 is given.

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