Lattice QCD Study of Pion Electroproduction and Weak Production from a Nucleon
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916700892430336 |
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| author | Gao, Yu-Sheng Zhang, Zhao-Long Feng, Xu Jin, Lu-Chang Liu, Chuan Meißner, Ulf-G. |
| author_facet | Gao, Yu-Sheng Zhang, Zhao-Long Feng, Xu Jin, Lu-Chang Liu, Chuan Meißner, Ulf-G. |
| contents | Quantum fluctuations in QCD influence nucleon structure and interactions, with pion production serving as a key probe of chiral dynamics. In this study, we present a lattice QCD calculation of multipole amplitudes at threshold, related to both pion electroproduction and weak production from a nucleon, using two gauge ensembles near the physical pion mass. We develop a technique for spin projection and construct multiple operators for analyzing the generalized eigenvalue problem in both the nucleon-pion system in the center-of-mass frame and the nucleon system with nonzero momentum. The numerical lattice results are then compared with those extracted from experimental data and predicted by low-energy theorems incorporating one-loop corrections. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_12074 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Lattice QCD Study of Pion Electroproduction and Weak Production from a Nucleon Gao, Yu-Sheng Zhang, Zhao-Long Feng, Xu Jin, Lu-Chang Liu, Chuan Meißner, Ulf-G. High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory Quantum fluctuations in QCD influence nucleon structure and interactions, with pion production serving as a key probe of chiral dynamics. In this study, we present a lattice QCD calculation of multipole amplitudes at threshold, related to both pion electroproduction and weak production from a nucleon, using two gauge ensembles near the physical pion mass. We develop a technique for spin projection and construct multiple operators for analyzing the generalized eigenvalue problem in both the nucleon-pion system in the center-of-mass frame and the nucleon system with nonzero momentum. The numerical lattice results are then compared with those extracted from experimental data and predicted by low-energy theorems incorporating one-loop corrections. |
| title | Lattice QCD Study of Pion Electroproduction and Weak Production from a Nucleon |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2502.12074 |