ηc-VV Problem in Constituent Quark Model

  • The problem about ηc decay into two vector mesons, such as ηc→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 ηc→VLVT 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.
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Jia Yu and Zhao Guangda. ηc-VV Problem in Constituent Quark Model[J]. Chinese Physics C, 1999, 23(8): 765-773.
Jia Yu and Zhao Guangda. ηc-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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ηc-VV Problem in Constituent Quark Model

    Corresponding author: Jia Yu,
  • Department of Physics, Peking University, Beijing 100871

Abstract: The problem about ηc decay into two vector mesons, such as ηc→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 ηc→VLVT 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.

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