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Peer-reviewedCC BY 4.0Journal of High Energy Physics

First next-to-next-to-leading-order extraction of fragmentation functions for Λ hyperons

  • Valerio Bertone1
  • Alessia Bongallino2
  • Amedeo Chiefa3
  • Miguel G. Echevarría2
  • Gunar Schnell2,4
4 affiliations
  1. 1Université Paris-Saclay, CEA, IRFU
  2. 2University of the Basque Country (EHU)
  3. 3University of Edinburgh, JCMB, KB
  4. 4IKERBASQUE, Basque Foundation for Science
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Abstract

A bstract : 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 Λ 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.

Versions

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Cite

BibTeXRIS
BibTeX
@article{bertone2026first,
  title = {{First next-to-next-to-leading-order extraction of fragmentation functions for Λ hyperons}},
  author = {Valerio Bertone and Alessia Bongallino and Amedeo Chiefa and Miguel G. Echevarría and Gunar Schnell},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)089},
  url = {https://link.springer.com/10.1007/JHEP10(2026)089},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - First next-to-next-to-leading-order extraction of fragmentation functions for Λ hyperons
AU  - Valerio Bertone
AU  - Alessia Bongallino
AU  - Amedeo Chiefa
AU  - Miguel G. Echevarría
AU  - Gunar Schnell
PY  - 2026
DA  - 2026/10/08
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)089
UR  - https://link.springer.com/10.1007/JHEP10(2026)089
AB  - A bstract : 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 Λ 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.
SN  - 1029-8479
ER  -