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Colour-Octet Effects in Radiative $\Upsilon$ Decays
We investigate the effects of colour-octet contributions to the radiative framework. Photons coming both from the coupling to hard processes (`direct') and by collinear emission from light quarks (`fragmentation') are consistently included at next-to-leading order (NLO) in $\alpha_s$. An e...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1998
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.59.074006 http://cds.cern.ch/record/358030 |