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

ηc-VV Problem in Constituent Quark Model

  •  Department of Physics, Peking University, Beijing 100871

  • 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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    [1] Bfodsky S J, Lepage G P. Phys. Rev.1981,D24:28482 Chernyak VI, Zhithetsky A R. Nucl. Phys.1982, B201: 492; Phys. Rep. 1984, 112: 1733 Particle Data Group, Barnett R M et al. Phys. Rev.1996, D54:5284 Anselmino M, Caruso F, Murgia F. Phys. Rev.1990, D42:3218; Anselmino M,Cancelliere R.Murgia F. Phys. Rev.1992, D46:50495 Anselmino M, Caruso,Forte S. Phys. Rev,1991,D44: 1438; Anselmino M, Caruso,Soares J Mod.Phys. Lett, 1991,A6:14156 Benayoun M, Chernyak V L. Zhitnitsky I R. Nucl. Phys., 1991,B348:327 7 Li X Q, Bugg D V, Zou B S. Phys. Rev.1997, D55: 14218 Chen Y Q, Braaten E.hep–ph / 98012269 Wang X N , Xiang X D, Huang T. Commun. Theor. Phys, 1986, 5: 12310 Bolz J,Kroll P, Schuler G A.hep–ph/ 9704378 11 Barbieri R, Gatto R, Kogerler R Phys. Lett, 1976, B60: 183 12 Anselmino M, Murgia F. Phys. Rev.3 1993, D47:3977 13 Hou W S, Soui A. Phys. Rev. Lett., 1983, 50:569: Phys. Rev, 1984, D29:101; Hou W S. Phys. Rev., 1997,D55:695214 Brodsky S J, Lapape G P, Tuan S F. Phys. Rev. Lett.1987, 59:621 15 Anselmino M, Genovese, Predazzi E. Phys. Rev., 1991, D44:1597; Anselmino M, Genovese M, Kharzeev D E. Phys.Rev 1994, D50:59516 Chao K T, Gu Y F, Tuan S F. Commun. Theor Phys, 1996, 25:471

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

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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