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تسجيل مستخدم جديدPerturbative corrections to power suppressed effects in $bar Bto X_uell u$
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We compute the $O(alpha_s)$ corrections to the Wilson coefficients of the dimension five operators in inclusive semileptonic $B$ decays in the limit of a massless final quark. Our calculation agrees with reparameterization invariance and with previous results for the total width and places constraints on the shape functions that enter those decays.
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