Charged hadron fragmentation functions from collider data: NNPDF Collaboration

V Bertone; N P Hartland; E R Nocera; J Rojo; L Rottoli

doi:10.1140/epjc/s10052-018-6130-4

Charged hadron fragmentation functions from collider data: NNPDF Collaboration

Eur Phys J C Part Fields. 2018;78(8):651. doi: 10.1140/epjc/s10052-018-6130-4. Epub 2018 Aug 16.

Authors

V Bertone^{1

2}, N P Hartland^{1

2}, E R Nocera³, J Rojo^{1

2}, L Rottoli⁴

Affiliations

¹ 1Department of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands.
² 2Nikhef Theory Group, Science Park 105, 1098 XG Amsterdam, The Netherlands.
³ 3Higgs Centre for Theoretical Physics, School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3FD UK.
⁴ 4Clarendon Laboratory, Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Parks Road, Oxford, OX1 3PU UK.

Abstract

We present NNFF1.1h, a new determination of unidentified charged-hadron fragmentation functions (FFs) and their uncertainties. Experimental measurements of transverse-momentum distributions for charged-hadron production in proton-(anti)proton collisions at the Tevatron and at the LHC are used to constrain a set of FFs originally determined from electron-positron annihilation data. Our analysis is performed at next-to-leading order in perturbative quantum chromodynamics. We find that the hadron-collider data is consistent with the electron-positron data and that it significantly constrains the gluon FF. We verify the reliability of our results upon our choice of the kinematic cut in the hadron transverse momentum applied to the hadron-collider data and their consistency with NNFF1.0, our previous determination of the FFs of charged pions, kaons, and protons/antiprotons.