Extracting the Pion Distribution Amplitude from Lattice QCD through Pseudo-Distributions
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866911756861833216 |
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| author | Kovner, Daniel Karpie, Joe Orginos, Konstantinos Radyushkin, Anatoly Zafeiropoulos, Savvas |
| author_facet | Kovner, Daniel Karpie, Joe Orginos, Konstantinos Radyushkin, Anatoly Zafeiropoulos, Savvas |
| contents | The Light-Cone Distribution Amplitude (LCDA) encodes the non-perturbative information of the leading Fock component of the hadron wave function, therefore required for processes including exclusive hadron production. As the pseudo-Nambu-Goldstone boson of QCD, the nonperturbative structure of the pion is of particular interest. Progress on the Lattice QCD calculation of the pion LCDA on ${\cal O}(a)$-improved Wilson fermion ensembles at several lattice spacings is presented. Excited-state systematics are taken into account within a Bayesian Model Averaging framework. A Renormalization-Group-Invariant (RGI) ratio of matrix elements is formed for further extraction of the pion LCDA. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_06858 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Extracting the Pion Distribution Amplitude from Lattice QCD through Pseudo-Distributions Kovner, Daniel Karpie, Joe Orginos, Konstantinos Radyushkin, Anatoly Zafeiropoulos, Savvas High Energy Physics - Lattice High Energy Physics - Phenomenology The Light-Cone Distribution Amplitude (LCDA) encodes the non-perturbative information of the leading Fock component of the hadron wave function, therefore required for processes including exclusive hadron production. As the pseudo-Nambu-Goldstone boson of QCD, the nonperturbative structure of the pion is of particular interest. Progress on the Lattice QCD calculation of the pion LCDA on ${\cal O}(a)$-improved Wilson fermion ensembles at several lattice spacings is presented. Excited-state systematics are taken into account within a Bayesian Model Averaging framework. A Renormalization-Group-Invariant (RGI) ratio of matrix elements is formed for further extraction of the pion LCDA. |
| title | Extracting the Pion Distribution Amplitude from Lattice QCD through Pseudo-Distributions |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.06858 |