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

Abstract

We study the cross section for the photoproduction process $\gamma N\to hX$ 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 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.

11 pages, 7 figures. Numerical results updated

References in corpus (9)

• Parton distributions for the LHC
• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• Evidence for polarization of gluons in the proton
• Global Analysis of Helicity Parton Densities and Their Uncertainties
• Single-Inclusive Production of Hadrons and Jets in Lepton-Nucleon Scattering at NLO
• Threshold Resummation for Di-hadron Production in Hadronic Collisions
• Single-Inclusive Hadron Production in Polarized pp Scattering at Next-to-Leading Logarithmic Accuracy
• Toward NNLL Threshold Resummation for Hadron Pair Production in Hadronic Collisions

Cited by in corpus (4)

• Threshold and jet radius joint resummation for single-inclusive jet production
• Double-Longitudinal Spin Asymmetry in Single-Inclusive Lepton Scattering at NLO
• Direct- and Resolved-Photon Threshold Resummation for Polarized High-$p_T$ Hadron Production at COMPASS
• Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high $p_T$