Quasiparton distributions of pions at large longitudinal momentum
In this paper, we develop an approach to calculate the valence-quark quasiparton distribution amplitude (quasi-PDA) and quasiparton distribution function (quasi-PDF) for the pion with a large longitudinal momentum with the functional renormalization group (fRG). This is demonstrated in a low energy...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
1 October 2025
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| In: |
Physical review
Year: 2025, Jahrgang: 112, Heft: 7, Pages: 1-16 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/9k1c-kwvw |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/9k1c-kwvw Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/9k1c-kwvw 
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| Verfasserangaben: | Dao-yu Zhang, Chuang Huang and Wei-jie Fu |
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| 520 | |a In this paper, we develop an approach to calculate the valence-quark quasiparton distribution amplitude (quasi-PDA) and quasiparton distribution function (quasi-PDF) for the pion with a large longitudinal momentum with the functional renormalization group (fRG). This is demonstrated in a low energy effective theory (LEFT) with four-quark scatterings. In the study of the complex structure of quasi-PDA, we introduce a deformed integration contour in the calculations of quasi-PDA or quasi-PDF, which allows us to obtain correct integrals for all momentum fractions. It is found that the pion light-front PDA extrapolated from quasi-PDA based on the large momentum effective theory in the LEFT is comparable with lattice QCD and Dyson-Schwinger equation. This work paves the way to study the PDA and PDF within the fRG approach to first-principles QCD. | ||
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| 700 | 1 | |a Fu, Wei-jie |e VerfasserIn |0 (DE-588)1147594007 |0 (DE-627)1006344063 |0 (DE-576)495884642 |4 aut | |
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