“School of Particles”
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| Paper IPM / Particles / 15365 |
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In this article, 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 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 annihilations. The zero mass variable flavor number scheme (ZM-VFNS) has been used to account the heavy flavor contributions. The obtained optimum set of residual charged hadron FFs is accompanied by the 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 very important impact on the inclusive charged hadron FFs as well as on the quality and the reliability of the QCD fit.
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