Fragmentation Functions of Charged Hadrons at Next-to-Next-to-Leading Order and Constraints on the Proton Parton Distribution Functions

Author(s): Jun Gao, XiaoMin Shen, Hongxi Xing, Yuxiang Zhao, and Bin Zhou We present the first global analysis of fragmentation functions for light charged hadrons (${π}^{±}$, ${K}^{±}$) at full next-to-next-to-leading order in quantum chromodynamics, incorporating world data from both single-inclusive electron-positron annihilation and semi-inclusive deep-inelastic scatt… [Phys. Rev. Lett. 135, 041902] Published Thu Jul 24, 2025