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Dispersive calculation of $B_{7}^{3/2}$ and $B_{8}^{3/2}$ in the chiral limit
We show how the isospin vector and axialvector current spectral functions rho_V and rho_A can be used to determine in leading chiral order the low energy constants B_7^{3/2} and B_8^{3/2}. This is accomplished by matching the Operator Product Expansion to the dispersive analysis of vacuum polarizati...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0370-2693(00)00239-2 http://cds.cern.ch/record/407682 |