| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8197503 | Physics Letters B | 2007 | 8 Pages |
Abstract
We compute annihilation amplitudes for charmless B decays that are proportional to the three-parton twist-3 light meson distribution amplitude Ï3M(x1,x2) with an active gluon. Due to an enhancement from a quark propagator at the scale p2â¼mbÎQCD these terms occur at the same parametric order in αs(mb) and 1/mb as the known leading order annihilation involving fB and twist-2 meson distributions. With our calculation the leading order annihilation amplitude is now complete. At lowest order in αs the new amplitudes are real and only O5-8 contribute. Using simple models we find that the three-parton and two-parton terms are of comparable size.
Related Topics
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Authors
Christian M. Arnesen, Ira Z. Rothstein, Iain W. Stewart,