IPM-x, the first IPM and xFitter joint collaboration

• Hamed Abdolmaleki (IPM)

We present the first open-source analysis of fragmentation functions (FFs) of charged pions (entitledIPM-xFitter) performed at next-to-leading order (NLO) and next-to-next-to-leadingorder (NNLO) accuracy in perturbative QCD using the xFitter framework. This study incorporates a comprehensive and up-to-date set of pion production data from single-inclusive annihilation (SIA) processes, together with the most recent measurements of inclusive cross-sections of single pion by the BELLE collaboration. The determination of pion FFs along with their theoretical uncertainties is performed in the Zero-Mass Variable-Flavor Number Scheme (ZM-VFNS). We also present comparisons of our FFs set with recent fits from the literature. The resulting NLO and NNLO pion FFs provide valuable insights for applications in present and future high-energy analysis of pion final state processes.