Next-to-leading-log renormalization-group running in heavy-quarkonium creation and annihilation
In the framework of potential NRQCD, we obtain the next-to-leading-log renormalization-group running of the matching coefficients for the heavy quarkonium production currents near threshold. This allows to obtain S-wave heavy-quarkonium production/annihilation observables with next-to-leading-log ac...
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2002 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/12464 |
| Acceso en línea: | https://hdl.handle.net/2445/12464 |
| Access Level: | acceso abierto |
| Palabra clave: | Teoria de camps (Física) Particles (Nuclear physics) Renormalització (Física) Pertorbació (Dinàmica quàntica) Field theory (Physics) Partícules (Física nuclear) Renormalization (Physics)) Perturbation (Quantum dynamics) |
| Sumario: | In the framework of potential NRQCD, we obtain the next-to-leading-log renormalization-group running of the matching coefficients for the heavy quarkonium production currents near threshold. This allows to obtain S-wave heavy-quarkonium production/annihilation observables with next-to-leading-log accuracy within perturbative QCD. In particular, we give expressions for the decays of heavy quarkonium to e^+e^- and to two photons. We also compute the O(m\alpha^8\ln^3\alpha) corrections to the Hydrogen spectrum. |
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