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- W2082003083 abstract "Abstract We compute annihilation amplitudes for charmless B decays that are proportional to the three-parton twist-3 light meson distribution amplitude ϕ 3 M ( x 1 , x 2 ) with an active gluon. Due to an enhancement from a quark propagator at the scale p 2 ∼ m b Λ QCD these terms occur at the same parametric order in α s ( m b ) and 1 / m b as the known leading order annihilation involving f B and twist-2 meson distributions. With our calculation the leading order annihilation amplitude is now complete. At lowest order in α s the new amplitudes are real and only O 5 – 8 contribute. Using simple models we find that the three-parton and two-parton terms are of comparable size." @default.
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- W2082003083 date "2007-04-01" @default.
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- W2082003083 title "Three-parton contributions to <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si1.gif overflow=scroll><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msub><mml:mi>M</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:msub><mml:mi>M</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> annihilation at leading order" @default.
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- W2082003083 doi "https://doi.org/10.1016/j.physletb.2007.02.041" @default.
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