Hadronization in Nuclei - Multidimensional Study

TL;DR

This study investigates how hadronization varies within nuclei by measuring hadron multiplicities in semi-inclusive deep-inelastic scattering on different nuclear targets, providing detailed multidimensional data to refine theoretical models.

Contribution

It presents the first multidimensional analysis of hadronization in nuclei, offering detailed dependence on multiple kinematic variables to better constrain hadronization models.

Findings

Hadron multiplicity ratios vary with kinematic variables.

Distinct differences observed between positively and negatively charged hadrons.

Results enhance understanding of nuclear effects in hadronization.

Abstract

Hadron multiplicities in semi-inclusive deep-inelastic scattering were measured on neon, krypton and xenon targets relative to deuterium at an electron-beam energy of 27.6 GeV at HERMES. These ratios were determined as a function of the virtual-photon energy nu, its virtuality Q2, the fractional hadron energy z and the transverse hadron momentum with respect to the virtual-photon direction p_t . Dependences were analysed separately for positively and negatively charged pions and kaons as well as protons and antiprotons in a two-dimensional representation. These results will help to constrain mechanisms and models of hadronization much more decisively than by the use of integrated results as traditionally done. A few features particular to the two-dimensional representation are highlighted in this contribution.