The $D_sDK^*$ vertex in QCD Sum Rules: form factors and coupling constant
| Autor: | M.E. Bracco, B. Osorio Rodrigues, C. M. Zanetti, A. Cerqueira |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Vertex (graph theory) Coupling constant Work (thermodynamics) QCD sum rules Particle physics Meson High Energy Physics::Lattice High Energy Physics::Phenomenology Nuclear Theory General Physics and Astronomy FOS: Physical sciences High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) High Energy Physics::Experiment |
| DOI: | 10.48550/arxiv.2112.03146 |
| Popis: | In this work we study the meson vertex $D_sDK^*$ using the QCD sum rules. We compute the three point correlation functions for the three cases of different off-shell mesons. The form factors for each case are fitted to the numerical calculation of the correlation functions and the coupling constant of the vertex is obtained by comparing the form factors at their respective off-shell meson pole. The result obtained for the coupling constant is $g_{D_sDK^*} = 2.29^{+0.65}_{-0.41}$. Comment: 21 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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