Abstract
In this paper, we studied the and transition processes and made the calculations for the transition form factor and the -meson electromagnetic form factors, and , by employing the perturbative QCD (PQCD) factorization approach. For the transition, we found that the contribution to form factor from the term proportional to the distribution amplitude combination is absolutely dominant, and the PQCD predictions for both the size and the -dependence of this form factor agree well with those from the extended anti-de Sitter/QCD models or the light-cone QCD sum rule. For the transition and in the region of , furthermore, we found that the PQCD predictions for the magnitude and their -dependence of the and form factors agree well with those from the QCD sum rule, while the PQCD prediction for is much larger than the one from the QCD sum rule.
- Received 22 October 2015
- Corrected 15 March 2016
DOI:https://doi.org/10.1103/PhysRevD.92.094031
© 2015 American Physical Society
Corrections
15 March 2016