Speaker
Description
We present a systematic QCD analysis of pion nuclear fragmentation functions (nFFs), which encode nuclear modifications to hadronization in high-energy nuclear collisions. Within this framework, both the vacuum fragmentation functions and their nuclear corrections are extracted simultaneously. The extracted nuclear modifications are parameterized as functions of the mass number A, the virtual-photon energy \nu in the laboratory frame, and the hadron momentum fraction z, allowing their dependence on these variables to be quantified. Our analysis includes semi-inclusive deep-inelastic scattering data on nuclear targets, with kinematic cuts chosen to ensure the applicability of perturbative QCD and collinear factorization. The resulting fit provides a good description of most datasets, with the nFFs well constrained in the momentum fraction range z in [0.2, 0.7]. Additionally, with our new nFFs, we present NLO predictions in proton–proton and proton–nucleus collisions, which show good agreement with ALICE data.
| 请选择分会 | 高能重离子物理 |
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