Uncertainties in pion and kaon fragmentation functions

Abstract

We present a detailed assessment of uncertainties in parton-to-pion and parton-to-kaon fragmentation functions obtained in recent global QCD analyses of single-inclusive hadron production data at next-to-leading order accuracy. We use the robust Lagrange multiplier approach for determining uncertainties to validate the applicability of the simpler but approximate Hessian method. Extensive comparisons of the results obtained within both methods are presented for the individual parton-to-pion and kaon fragmentation functions. We provide Hessian eigenvector sets of pion and kaon fragmentation functions that allow one to easily propagate their uncertainties to any observable. Various applications of these sets are presented for pion and kaon production in electron-positron annihilation, lepton-nucleon scattering, and proton-proton collisions.

12 pages, 11 figures

References in corpus (10)

• Parton distributions for the LHC
• New parton distributions for collider physics
• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• Global Analysis of Helicity Parton Densities and Their Uncertainties
• The PDF4LHC Working Group Interim Report
• Global Analysis of Fragmentation Functions for Protons and Charged Hadrons
• Determination of fragmentation functions and their uncertainties
• Inclusive cross section and double helicity asymmetry for π^0 production in p+p collisions at sqrt(s)=200 GeV: Implications for the polarized gluon distribution in the proton
• Neutral pion and $\eta$ meson production in proton-proton collisions at $\sqrt{s}=0.9$ TeV and $\sqrt{s}=7$ TeV

Cited by in corpus (20)

• The Physics of the B Factories
• Parton-to-Pion Fragmentation Reloaded
• Parton Fragmentation Functions
• Investigations into the flavor dependence of partonic transverse momentum
• Parton-to-Kaon Fragmentation Revisited
• Confronting current NLO parton fragmentation functions with inclusive charged-particle spectra at hadron colliders
• Using hadron-in-jet data in a global analysis of $D^{\ast }$ fragmentation functions
• QCD resummation for semi-inclusive hadron production processes
• Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3\mathrm{He}$ Target
• Determination of pion and kaon fragmentation functions including spin asymmetries data in a global analysis
• Prospects for Charged Current Deep-Inelastic Scattering off Polarized Nucleons at a Future Electron-Ion Collider
• Fragmentation Functions Beyond Fixed Order Accuracy
• Interplay of Threshold Resummation and Hadron Mass Corrections in Deep Inelastic Processes
• On the extraction of the intrinsic light-quark sea in the proton
• Reply to Comment on "Reevaluation of the parton distribution of strange quarks in the nucleon"
• Vector meson fragmentation using a model with broken SU(3) at the Next-to-Leading Order
• Flavor dependence of unpolarized TMDs from semi-inclusive pion production
• Medium modified Fragmentation Functions with open source xFitter
• Consistency check of charged hadron multiplicities and fragmentation functions in SIDIS
• Fragmentation of $\omega$ and $\varphi$ Mesons in $e^{+}{e}^{-}$ and $pp$ Collisions at NLO