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Determination of contributions from residual light charged hadrons to inclusive charged hadrons from e+e- annihilation data

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Abstract.

In this paper, we present an extraction of the contribution from the “residual” light charged hadrons to the inclusive unidentified light charged hadron fragmentation functions (FFs) at next-to-leading (NLO) and, for the first time, at next-to-next-to-leading order (NNLO) accuracy in perturbative QCD. Considering the contributions from charged pion, kaon and (anti)proton FFs from recent NNFF1.0 analysis of charged hadron FFs, we determine the small but efficient residual charged hadron FFs from QCD analysis of all available single inclusive unidentified charged hadron data sets in electron-positron (\( e^{+} e^{-}\)) annihilations. The zero-mass variable flavor number scheme (ZM-VFNS) has been applied to account for the heavy flavor contributions. The obtained optimum set of residual charged hadron FFs is accompanied by the well-known Hessian technique to assess the uncertainties in the extraction of these new sets of FFs. It is shown that the residual contributions of charged hadron FFs have a very important impact on the inclusive charged hadron FFs and substantially on the quality and the reliability of the QCD fit. Furthermore, this study shows that the residual contributions become also sizable for the case of heavy quark FFs as well as for the c- and b-tagged cross sections.

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Author information

Authors and Affiliations

  1. Department of Physics, Ferdowsi University of Mashhad, P.O.Box 1436, Mashhad, Iran

    Alireza Mohamaditabar & F. Taghavi-Shahri

  2. Department of Physics, University of Science and Technology of Mazandaran, P.O.Box 48518-78195, Behshahr, Iran

    Hamzeh Khanpour

  3. School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O.Box 19395-5531, Tehran, Iran

    Hamzeh Khanpour & Maryam Soleymaninia

Authors
  1. Alireza Mohamaditabar
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  2. F. Taghavi-Shahri
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  3. Hamzeh Khanpour
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  4. Maryam Soleymaninia
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Corresponding author

Correspondence to F. Taghavi-Shahri.

Additional information

Communicated by R. Alkofer

Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All data used in this analysis are properly referred and all data generated during this study are contained in this published article.]

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Mohamaditabar, A., Taghavi-Shahri, F., Khanpour, H. et al. Determination of contributions from residual light charged hadrons to inclusive charged hadrons from e+e- annihilation data. Eur. Phys. J. A 55, 185 (2019). https://doi.org/10.1140/epja/i2019-12881-4

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  • DOI: https://doi.org/10.1140/epja/i2019-12881-4

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