$D^*D\pi$ form factor revisited

F. S. Navarra; M. Nielsen; M. E. Bracco

doi:10.1103/PhysRevD.65.037502

$D^*D\pi$ form factor revisited

高能物理 - 唯象学 2009-11-07 v1 核理论

作者: F. S. Navarra , M. Nielsen , M. E. Bracco

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摘要

The $D^*D\pi$ form factor is evaluated in a QCD sum rule calculation for both $D$ and $\pi$ off-shell mesons. We study the Borel sum rule for the three-point function of one pseudoscalar, one axial and one vector meson currents. We find that the momentum dependence of the form factors is very different if the $D$ or the $\pi$ meson is off-shell, but they lead to the same coupling constant in the $D^*D\pi$ vertex.

关键词

form factors qcd sum rules

引用

@article{arxiv.hep-ph/0109188,
  title  = {$D^*D\pi$ form factor revisited},
  author = {F. S. Navarra and M. Nielsen and M. E. Bracco},
  journal= {arXiv preprint arXiv:hep-ph/0109188},
  year   = {2009}
}

备注

8 pages, RevTeX including 2 figures in ps files

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