Space-like and time-like pion-rho transition form factors in the light-cone formalism

作者：Yu Jianghao^*; Xiao Bo Wen; Ma Bo Qiang

来源：Journal of Physics G: Nuclear and Particle Physics , 2007, 34(7): 1845-1860.

DOI：10.1088/0954-3899/34/7/021

Having calculated the light-cone wavefunction of the pseudoscalar meson by using two equivalent and fully covariant methods, we generalize such methods to the valence Fock states of the vector meson in the light-cone formalism. We investigate the decay constant of the rho meson f(rho), the gamma*pi pi -> rho and gamma* rho -> pi transition form factors and especially the transition magnetic moments. By using two groups of constraint parameters, we predict the space- like and timelike form factors F-pi rho(Q(2)) and F-rho pi(Q(2)) at low and moderate energy scale and the electromagnetic radius of these transition processes. In addition, we extend our calculation to gamma* pi -> omega space-like and time- like form factors by using the same sets of parameters.

• 出版日期2007-7
• 单位北京大学