Three-particle contributions to the renormalisation of B-meson light-cone distribution amplitudes
High Energy Physics - Phenomenology
2009-05-29 v2
Abstract
We study light-cone distribution amplitudes of heavy-light systems, such as a B-meson. By an explicit computation, we determine how two-parton distribution amplitudes mix with three-parton ones at one loop: \phi_+ is shown to mix only into itself, whereas \phi_- mixes with the difference of three-parton distribution amplitudes \Psi_A-\Psi_V. We determine the corresponding anomalous dimension and we check the gauge independence of our result by considering a general covariant gauge. Finally, we comment on some implications of our result for phenomenological models of these distribution amplitudes.
Keywords
Cite
@article{arxiv.0903.0790,
title = {Three-particle contributions to the renormalisation of B-meson light-cone distribution amplitudes},
author = {S. Descotes-Genon and N. Offen},
journal= {arXiv preprint arXiv:0903.0790},
year = {2009}
}
Comments
21 pages, 5 figures, some comments and 2 references added, except for typesetting matches version published in JHEP