D*Dπ and B*Bπ form factors from QCD sum rules
| Autor: | Fernando Silveira Navarra, M.E. Bracco, Marina Nielsen, Marcelo Chiapparini, C. L. Schat |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Quantum chromodynamics Nuclear and High Energy Physics Particle physics QCD sum rules Meson High Energy Physics::Lattice Nuclear Theory High Energy Physics::Phenomenology Form factor (quantum field theory) Atomic and Molecular Physics and Optics Pseudoscalar Sum rule in quantum mechanics Vector meson Operator product expansion Nuclear Experiment |
| Zdroj: | Nuclear Physics B - Proceedings Supplements. 96:381-385 |
| ISSN: | 0920-5632 |
| DOI: | 10.1016/s0920-5632(01)01156-2 |
| Popis: | The H * H π 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 π coupling constant. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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