A global analysis of $π^0$, $K_S^0$ and $η$ fragmentation functions with BESIII data
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910413920141312 |
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| author | Li, Mengyang Anderle, Daniele Paolo Xing, Hongxi Zhao, Yuxiang |
| author_facet | Li, Mengyang Anderle, Daniele Paolo Xing, Hongxi Zhao, Yuxiang |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_11527 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A global analysis of $π^0$, $K_S^0$ and $η$ fragmentation functions with BESIII data Li, Mengyang Anderle, Daniele Paolo Xing, Hongxi Zhao, Yuxiang High Energy Physics - Phenomenology High Energy Physics - Experiment 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. |
| title | A global analysis of $π^0$, $K_S^0$ and $η$ fragmentation functions with BESIII data |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2404.11527 |