Abstract
We present a calculation of O(α_s) contributions to the process of t-channel single-top production and decay, which include virtual and real corrections arising from interference of the production and decay subprocesses. The calculation is organized as a simultaneous expansion of the matrix elements in the couplings α_{ew},α_s and the virtuality of the intermediate top quark, (p_t^2-m_t^2)/m_t^2 ~ Γ_t/m_t, and extends earlier results beyond the narrow-width approximation.
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