Global analysis of fragmentation functions for pions and kaons and their uncertainties

Abstract

We present new sets of pion and kaon fragmentation functions obtained in NLO combined analyses of single-inclusive hadron production in electron-positron annihilation, proton-proton collisions, and deep-inelastic lepton-proton scattering with either pions or kaons identified in the final state. At variance with all previous fits, the present analyses take into account data where hadrons of different electrical charge are identified, which allow to discriminate quark from anti-quark fragmentation functions without the need of non trivial flavor symmetry assumptions. The resulting sets are in good agreement with all data analyzed, which cover a much wider kinematical range than in previous fits. An extensive use of the Lagrange multiplier technique is made in order to assess the uncertainties in the extraction of the fragmentation functions and the synergy from the complementary data sets in our global analysis.

arXiv comment28 pages, 25 figures

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• Single-inclusive hadron production in transversely polarized p-p and pbar-p collisions with threshold resummation
• Constraining fragmentation functions through hadron-photon production at higher-orders
• Global extraction of the parton-to-kaon fragmentation functions at NLO in QCD
• Utilizing high-$p_{\perp }$ theory and data to constrain the initial stages of quark-gluon plasma
• On the beam spin asymmetries of electroproduction of charged hadrons off the nucleon targets
• Dynamical energy loss formalism: from describing suppression patterns to implications for future experiments
• Particle production at large $p_T$ in Xe+Xe collisions with jet quenching using the higher twist approach
• Importance of higher orders in opacity in QGP tomography
• Medium-induced flavor conversion and kaon spectra in electron-ion collisions
• Global analysis of nuclear PDFs - latest developments
• Single-valued representation of unpolarized and polarized semi-inclusive deep inelastic scattering at next-to-next-to-leading order
• Global extraction of the parton-to-pion fragmentation functions at NLO accuracy in QCD
• Probing nucleon spin structure in deep-inelastic scattering, proton-proton collisions and Drell-Yan processes
• Charm fragmentation functions in the Nambu-Jona-Lasinio model
• From semi-hard processes to the unintegrated gluon distribution: a phenomenological path in the high-energy framework
• Determination of meson fragmentation functions in the Field-Feynman model
• Neutral meson production in pp and Pb-Pb collisions measured by ALICE at the LHC
• Transverse spin polarization as a novel probe of medium-induced transverse-momentum-broadening effect
• Neutral meson production in pp and Pb-Pb collisions at LHC
• Spatially dependent parton distribution functions and hard processes in nuclear collisions
• Left-right asymmetry for pion and kaon production in the semi-inclusive deep inelastic scattering process
• Collisional and radiative energy loss in small systems
• Probing Gluons at the Spin Physics Detector
• Measurement of the longitudinal spin structure of the proton by COMPASS
• ECCE Sensitivity Studies for Single Hadron Transverse Single Spin Asymmetry Measurements
• Particle Production in the Color Class Condensate: from electron-proton DIS to proton-nucleus collisions
• Measurement of ${\mathbf{q}}_{\mathbf{T}}$-weighted transverse-spin-dependent azimuthal asymmetries at COMPASS
• Extracting the impact parameter dependence of the nPDFs from the EKS98 and EPS09 global fits
• Hard Quasi-real Photo-production of Charged Hadrons at COMPASS energies
• Parton distributions and $\cos 2{\varphi }_h$ asymmetry induced by anomalous photon-quark coupling
• Improved Method to extract Nucleon Helicity Distributions using Event Weighting
• AAK24: Global QCD analysis on polarized parton distribution in the presence of $A_2$ asymmetry measurements
• EPS09 - Global NLO analysis of nuclear PDFs and their uncertainties
• Fragmentation functions for pions, kaons, protons and charged hadrons
• Physics of Large-x Nuclear Suppression
• EPS09 - Global NLO analysis of nuclear PDFs
• $A_N$ in inclusive lepton-proton collisions: TMD and twist-3 approaches
• Constraining nPDFs with inclusive pions and direct photons at forward rapidities in p+Pb collisions at the LHC
• Phenomenology of Sivers Effect with TMD Evolution
• Scattering off the Color Glass Condensate
• Spin Physics at COMPASS
• Instanton induced transverse single spin asymmetry for ${\pi }^0$ production in $pp$-scattering
• Test of the Universality of Naive-time-reversal-odd Fragmentation Functions
• Single Inclusive ${\pi }^{\pm }$ and $K^{\pm }$ Production in $e^{+}{e}^{-}$ Annihilation at center-of-mass Energies from 2.000 to 3.671GeV
• Phenomenology of Dihadron Fragmentation Function
• Parton Fragmentation Functions
• Quantum Chebyshev Probabilistic Models for Fragmentation Functions
• Single inclusive hadron production in pA collisions at NLO
• An extended model for nonet pseudo-scalar meson fragmentation
• Forward hadron production in pA collisions beyond leading order
• Cross Section and Double Helicity Asymmetry in Charged Hadron Production in p+p Collisions at sqrt(s)=62.4 GeV at PHENIX
• A new twist-3 analysis of the single transverse-spin asymmetry for pion and kaon production at RHIC
• Centrality and rapidity dependence of inclusive pion and prompt photon production in p+Pb collisions at the LHC with EPS09s nPDFs