QCD analysis of Lambda hyperon production in DIS target-fragmentation region
Abstract
We consider Lambda-hyperon production in the target-fragmentation region of semi-inclusive deep-inelastic scattering within the framework of fracture functions. We present a first attempt to determine the flavour and energy dependences of these non-perturbative distributions through a simultaneous QCD-based fit to available neutral- and charged-current semi-inclusive-DIS cross sections. Predictions based on the resulting nucleon-to-Lambda fracture functions are in good agreement with data and observables not included in the regression. The successful prediction of the dependence of the Lambda multiplicity notably represents the first validation of the perturbative framework implied by fracture functions.
Cite
@article{arxiv.1211.3333,
title = {QCD analysis of Lambda hyperon production in DIS target-fragmentation region},
author = {Federico Alberto Ceccopieri and Davide Mancusi},
journal= {arXiv preprint arXiv:1211.3333},
year = {2015}
}
Comments
Detailed comparison to quark-gluon string model added together with 3 additional plots. Three references added. Conclusions unchanged. Minor corrections to the text. 18 pages, 18 figures, 3 tables