Simultaneous Determination of Fragmentation Functions and Test on Momentum Sum Rule

Jun Gao, ChongYang Liu,Xiaomin Shen,Hongxi Xing,Yuxiang Zhao

Physical Review Letters（2024）SCI 1区

INPAC School of Physics and Astronomy | INPAC Deutsches Elektronen-Synchrotron DESY | Chinese Academy of Sciences Institute of Modern Physics | Central China Normal University Institute of Particle Physics

Cited 3|Views15

Abstract

We perform a simultaneous global analysis of hadron fragmentation functions (FFs) to various charged hadrons (π±, K±, and p/p¯) at next-to-leading order in QCD. The world data include results from electron-positron single-inclusive annihilation, semi-inclusive deep inelastic scattering, as well as proton-proton collisions including jet fragmentation measurements for the first time, which lead to strong constraints on the gluon fragmentations. By carefully selecting hadron kinematics to ensure the validity of QCD factorization and the convergence of perturbative calculations, we achieve a satisfying best fit with χ2/d.o.f.=0.90. The total momentum of u, d quarks and gluon carried by light charged hadrons have been determined precisely, urging precision determinations of FFs to neutral hadrons for a test of fundamental sum rules in QCD fragmentation. Published by the American Physical Society 2024

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Muon Anomalous Magnetic Moment

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