$D^*Dπ$ and $B^*Bπ$ form factors from QCD Sum Rules

Details $D^*Dπ$ and $B^*Bπ$ form factors from QCD Sum Rules $D^*Dπ$ and $B^*Bπ$ form factors from QCD Sum Rules

2000-05-03

arxiv.org/abs/hep-ph/0005026v3

Phys.Lett. B489 (2000) 319-328

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, RevTeX including 6 figures in ps files, revised version accepted for publication in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(00)00967-9

The $H^*H\pi$ form factor for H = B and D mesons is evaluated in a QCD sum rule calculation. We study the Borel sum rule for the three point function of two pseudoscalar and one vector meson currents up to order four in the operator product expansion. The double Borel transform is performed with respect to the heavy meson momenta. We discuss the momentum dependence of the form factors and two different approaches to extract the $H^*H\pi$ coupling constant.

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