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Threshold resummation for polarized high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math>hadron production at COMPASS
We study the cross section for the photoproduction process $\ensuremath{\gamma}N\ensuremath{\rightarrow}hX$ where the incident photon and nucleon are longitudinally polarized and a hadron $h$ is observed at high transverse momentum. Specifically, we address the ``direct'' part of the cross section, for which the photon interacts in a pointlike way. For this …