Nonperturbative QCD contribution to gluon-gluon-eta' vertex

Details Nonperturbative QCD contribution to gluon-gluon-eta' vertex Nonperturbative QCD contribution to gluon-gluon-eta' vertex

1998-01-30

arxiv.org/abs/hep-ph/9801447v1

Phys.Rev. D57 (1998) 7034-7036

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LaTex, 2 postscript figures (included)

Scientific paper

10.1103/PhysRevD.57.7034

We investigate the momentum dependence of the g*-g-eta' vertex form factor in the presence of the nonperturbative QCD vacuum condensate. The behaviour of this form factor is crucial for, among other things, some proposed mechanisms devised to explain the large branching ratio for fast eta' production in charmless B decays observed by CLEO. We show that the leading momentum dependence of this vertex form factor is not altered when the contribution of nonperturbative quark condensate is considered.

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