ON THE “DIRECT CHANNEL DIAGRAM” OF THE PRODUCTION OF THE （π+ π-）s S-STATE ATOMS

HE JU; ZHANG ZHAO-XI; HE ZUO-XIU

Chinese Physics C> 1979, Vol. 3> Issue(3) : 297-303

ON THE “DIRECT CHANNEL DIAGRAM” OF THE PRODUCTION OF THE （π⁺π^-）_s S-STATE ATOMS

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Abstract：
In this paper we work out the relativistic covariant B-S wave function for the（π⁺ π^-）_s atoms.Some properties of the“direct channel diagram”of the produc-tion the （π⁺ π^-）_s atoms are discussed by calculating the cross-section of the process π⁺ +n→p+（π⁺ π^-）_swith the help of the relativistic covariant wave function and assuming the lowest termin the perturbation expansion series of the quantized composite field theory——the“direct channel diagram”is dominant.Besides this calcuation perhaps presentsa rough estimate for the interesting process μ⁺ +n→（μ⁺ π^-）+p.

References

[1]	何祚麻、张笨西、黄涛，物理学报，25 (1976), 215.[2] A. Nard, Phys. Rev., D5 (1972), 1531.[3] G. C. Wick, Phys. Rev.,96(1954), 1124.[4] R. E. Cutkosky, Phys. Rev.,96(1954 ). 1135.[5] 中国科学院数学研究所理论物理研究室，北京大学理论物理研究室基本粒子组，原子能，7,8 (1966), 507.

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HE JU, ZHANG ZHAO-XI and HE ZUO-XIU. ON THE “DIRECT CHANNEL DIAGRAM” OF THE PRODUCTION OF THE （π⁺π^-）_s S-STATE ATOMS[J]. Chinese Physics C, 1979, 3(3): 297-303.

HE JU, ZHANG ZHAO-XI and HE ZUO-XIU. ON THE “DIRECT CHANNEL DIAGRAM” OF THE PRODUCTION OF THE （π⁺π^-）_s S-STATE ATOMS[J]. Chinese Physics C, 1979, 3(3): 297-303. shu

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Received: 1978-05-20
Revised: 1900-01-01

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