η<SUB>c</SUB>-VV Problem in Constituent Quark Model

Jia Yu; Zhao Guangda

Chinese Physics C> 1999, Vol. 23> Issue(8) : 765-773

η_c-VV Problem in Constituent Quark Model

Jia Yu ^, ,
Zhao Guangda

Department of Physics, Peking University, Beijing 100871

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Abstract：
The problem about η_c decay into two vector mesons, such as η_c→ρρ, K* K*,φφ. are discussed in the Bethe-Salpeter framework. Both constituent quark mass and intrinsic quark transverse inchon inside the final state mesons are taken into account and their implications are discussed. The result shows that η_c→V_LV_T is stricly forbidden. Quark transverse momenta has apparent effect of enhancing the decay rate.Though both factors are included, the theoretical value is still smaller than the experimental data.

References

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Jia Yu and Zhao Guangda. η_c-VV Problem in Constituent Quark Model[J]. Chinese Physics C, 1999, 23(8): 765-773.

Jia Yu and Zhao Guangda. η_c-VV Problem in Constituent Quark Model[J]. Chinese Physics C, 1999, 23(8): 765-773. shu

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Received: 1998-05-20
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

η_c-VV Problem in Constituent Quark Model

Jia Yu ^,
Zhao Guangda

Corresponding author: Jia Yu,

Department of Physics, Peking University, Beijing 100871

Received Date: 1998-05-20
Accepted Date: 1900-01-01
Available Online: 1999-08-05

Abstract: The problem about η_c decay into two vector mesons, such as η_c→ρρ, K* K*,φφ. are discussed in the Bethe-Salpeter framework. Both constituent quark mass and intrinsic quark transverse inchon inside the final state mesons are taken into account and their implications are discussed. The result shows that η_c→V_LV_T is stricly forbidden. Quark transverse momenta has apparent effect of enhancing the decay rate.Though both factors are included, the theoretical value is still smaller than the experimental data.