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arXiv · 1510.01058

Threshold Resummation for Polarized High-$p_T$ Hadron Production at COMPASS

Claudia Uebler·Andreas Schäfer·Werner Vogelsang
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Abstract

We study the cross section for the photoproduction process $γN\rightarrow h X$ 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 contribution we perform an all-order resummation of logarithmic threshold corrections generated by soft or collinear gluon emission to next-to-leading logarithmic accuracy. We present phenomenological results relevant for the COMPASS experiment and compare to recent COMPASS data.

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Claudia Uebler, Andreas Schäfer, Werner Vogelsang. 2015-10-15. Threshold Resummation for Polarized High-$p_T$ Hadron Production at COMPASS. https://doi.org/10.1103/physrevd.92.094029

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