An improved description of charm fragmentation data

Abstract

We consider the fragmentation of heavy quarks into heavy-flavoured hadrons, specifically the production of charmed mesons in $e^{+}{e}^{-}$ collisions, at different centre-of-mass energies. We focus our attention on the ratio of moments of the $D^{\ast +}$ energy spectrum measured by ALEPH and CLEO. This ratio is believed to provide us with a direct test of perturbative QCD evolution because hadronisation effects should cancel between the numerator and denominator. However, state-of-the-art calculations based on standard (final-state) collinear factorisation fail to describe the experimental data. We show that this discrepancy is considerably reduced if heavy-quark threshold effects are accounted for not only in DGLAP evolution, as it is usually done, but also in the resummed coefficient functions.

6 pages, 2 figures. Version accepted by EPJ C

References in corpus (26)

• Parton-to-Pion Fragmentation Reloaded
• A determination of the fragmentation functions of pions, kaons, and protons with faithful uncertainties
• Simultaneous Monte Carlo analysis of parton densities and fragmentation functions
• QCD Corrections to Semi-Inclusive Hadron Production in Electron-Positron Annihilation at Two Loops
• Perturbative Heavy Quark Fragmentation Function through O(alpha_s^2)
• A Study of Heavy Flavoured Meson Fragmentation Functions in e+ e- annihilation
• $O({\alpha }_s^2)$ Timelike Wilson Coefficients for Parton-Fragmentation Functions in Mellin Space
• Perturbative Heavy Quark Fragmentation Function through O(α_s^2): Gluon Initiated Contribution
• Pion and kaon fragmentation functions at next-to-next-to-leading order
• On the quark distribution in an on-shell heavy quark and its all-order relations with the perturbative fragmentation function
• Effective field theory approach to heavy quark fragmentation
• Crossing Heavy-Flavour Thresholds in Fragmentation Functions
• Threshold Resummation in B --> X_c l nu_l Decays
• A consistent resummation of mass and soft logarithms in processes with heavy flavours
• Soft logarithms in processes with heavy quarks
• NNLO B-fragmentation fits and their application to $t\bar{t}$ production and decay at the LHC
• Reference results for time-like evolution up to $\mathcal{O}({\alpha }_s^3)$
• Modelling non-perturbative corrections to bottom-quark fragmentation
• A fragmentation-based study of heavy quark production
• On heavy-flavour jets with Soft Drop
• Charm-quark fragmentation with an effective coupling constant
• Resummation effects in the bottom-quark fragmentation function
• Improved Factorization for Threshold Resummation in Heavy Quark to Heavy Quark Decays
• Heavy Quark Fragmentation in $e^{+}{e}^{-}$ Collisions to NNLO+NNLL Accuracy in Perturbative QCD
• Global extraction of the parton-to-kaon fragmentation functions at NLO in QCD
• Perturbative and non-perturbative aspects of heavy-quark fragmentation

Cited by in corpus (5)

• Bottomoniumlike states in proton collisions: Fragmentation and resummation
• Fragmentation functions for axial-vector heavy tetraquarks: A TQ4Q1.1 update
• Multimodal Fragmentation of All-Heavy Pentaquarks: Uncertainty-Aware Predictions for Hadron Colliders
• D${}^0$-meson-tagged jet axes difference in proton-proton collisions at $\sqrt{\text{s}}=5.02$ TeV
• Heavy-flavor multimodal fragmentation to $S$-wave pentacharms at next-generation hadron colliders