Spacelike and timelike form factors for omega ->pi gamma(*) and K(*)-> K gamma(*) in the light-front quark model

作者：Choi Ho Meoyng^*

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2008, 77(9): 097301.

DOI：10.1103/PhysRevD.77.097301

We investigate space- and timelike form factors for omega ->pi gamma(*) and K(*)-> K gamma(*) decays using the light-front quark model constrained by the variational principle for the QCD-motivated effective Hamiltonian. The momentum dependent spacelike form factors are obtained in the q(+)=0 frame and then analytically continued to the timelike region. Our prediction for the timelike form factor F(omega pi)(q(2)) is in good agreement with the experimental data. We also find that the spacelike form factor F(K)(K)(*+)(+)(Q(2)) for charged kaons encounters a zero because of the negative interference between the two currents to the quark and the antiquark.

• 出版日期2008-5
• 单位南宁师范大学