A global analysis of π^0, K_S^0 and η fragmentation functions with BESIII data
arxiv(2024)
摘要
In this research, we conduct a global QCD analysis of fragmentation functions
(FFs) for neutral pions (π^0), neutral kaons (K_S^0), and eta mesons
(η), utilizing world data of single inclusive hadron production in
e^+e^- annihilation involving the most recent BESIII data with low collision
energy, to test the operational region of QCD collinear factorization for
single inclusive hadron production. We found that the QCD-based analysis at
next-to-next-to leading order in perturbative QCD with parameterized
higher-twist effects can explain both existing high-energy world data and the
BESIII new measurements, while the latter cannot be explained with existing FFs
extracted with high-energy data. To investigate the higher-twist contributions
to this discrepancy, a direct functional approach is employed, providing
testing framework for characterizing the experimental results over a wide range
of energy scales, from low to high, thus extending the classical theoretical
models to the BESIII domain.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要