Direct- and Resolved-Photon Threshold Resummation for Polarized High-$p_T$ Hadron Production at COMPASS
High Energy Physics - Phenomenology
2017-11-01 v1
Abstract
We complete our earlier study of the "direct" part of the cross section and spin asymmetry for the photoproduction process by analysing the "resolved" contribution, for which the photon couples like a hadron through its parton structure. The incident photon and nucleon are longitudinally polarized and one observes a hadron at high transverse momentum . Soft or collinear gluon emissions generate large logarithmic threshold corrections which we resum to next-to-leading logarithmic order. We compare our results with recent spin asymmetry data by the COMPASS collaboration, highlighting the role of the fragmentation functions.
Keywords
Cite
@article{arxiv.1708.08284,
title = {Direct- and Resolved-Photon Threshold Resummation for Polarized High-$p_T$ Hadron Production at COMPASS},
author = {Claudia Uebler and Andreas Schäfer and Werner Vogelsang},
journal= {arXiv preprint arXiv:1708.08284},
year = {2017}
}
Comments
11 pages, 9 figures