Radiative corrections and enhanced power corrections for the shape function in inclusive B decays
| Autor: | Jiro Kodaira, Hiroyuki Kawamura, Kazuhiro Tanaka |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Quantum chromodynamics
Cusp (singularity) Physics Nuclear and High Energy Physics Particle physics High Energy Physics::Lattice Operator (physics) High Energy Physics::Phenomenology Degrees of freedom (physics and chemistry) Equations of motion Atomic and Molecular Physics and Optics Symmetry (physics) Quantum electrodynamics Radiative transfer High Energy Physics::Experiment Limit (mathematics) |
| Zdroj: | Nuclear Physics B - Proceedings Supplements. 157:91-95 |
| ISSN: | 0920-5632 |
| DOI: | 10.1016/j.nuclphysbps.2006.03.011 |
| Popis: | In the heavy-quark limit, the decay spectrum for radiative and semileptonic inclusive B-meson decays are described by a structure function, i.e. the shape function. We study the operator structure of the shape function, taking into account the QCD radiative corrections. Separating the singular short-distance behavior due to the one-loop cusp divergence in a systematic way, the long-distance degrees of freedom in the shape function are disentangled based on the QCD equations of motion and heavy-quark symmetry, as the quark-gluon correlations relevant for the (enhanced) power corrections for the decay rates. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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