First next-to-next-to-leading-order extraction of fragmentation functions for Lambda hyperons
Abstract
We present MAPFF1.0_Lambda, the first global analysis at next-to-next-to-leading order in perturbative QCD of the collinear unpolarised fragmentation functions of Lambda hyperons. The fit is based on data from single-inclusive electron-positron annihilation, and from both neutral-current and -- for the first time -- charged-current semi-inclusive deep-inelastic scattering. We have adopted a statistical framework based on Monte Carlo sampling and parametrised fragmentation functions in terms of a neural network. The fragmentation function set comprises a total of seven independent parton flavours, allowing for the first independent determination of valence-quark distributions. Our analysis offers new insights into the hadronisation mechanism of strange baryons and establishes a baseline for future phenomenological and experimental investigations.
Keywords
Cite
@article{arxiv.2605.05314,
title = {First next-to-next-to-leading-order extraction of fragmentation functions for Lambda hyperons},
author = {Valerio Bertone and Alessia Bongallino and Amedeo Chiefa and Miguel G. Echevarria and Gunar Schnell},
journal= {arXiv preprint arXiv:2605.05314},
year = {2026}
}
Comments
v1: 30 pages, 14 figures