Semi-inclusive pion electroproduction with CLAS

TL;DR

This paper reports measurements of semi-inclusive pi+ electroproduction off protons using the CLAS detector, providing detailed cross sections that test fragmentation models and quantum chromodynamics predictions.

Contribution

It presents the first comprehensive measurement of fully-differential cross sections including azimuthal dependence in semi-inclusive pion electroproduction.

Findings

Phi-independent cross sections agree with pQCD calculations

Azimuthal angle dependence observed and separated

Data provides constraints for fragmentation models

Abstract

Measurement of the semi-inclusive pi+ electroproduction off the proton, performed with CLAS detector at Jefferson Lab, has been presented. The obtained fully-differential cross sections, including the azimuthal angle between hadronic and leptonic planes, phi, allowed us to separate the phi-dependent terms. While, the phi-independent part of the cross section was found to be in good agreement with current fragmentation pQCD calculations.