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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.04092 |
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| _version_ | 1866912114069733376 |
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| author | Passek-K., Kornelija |
| author_facet | Passek-K., Kornelija |
| contents | We discuss deeply virtual meson production (DVMP), focusing on the role of higher-twist contributions in the description of deeply virtual pseudoscalar mesons at experimentally accessible energies. The standard collinear approach at the lowest twist does not adequately describe deeply virtual $π_0$ production. By incorporating twist-2 transversity generalized parton distributions (GPDs) and a twist-3 meson distribution amplitude, we have determined the twist-3 contribution, which includes both the 2-body ($q\bar{q}$) and 3-body ($q\bar{q}g$) meson Fock components. Two methods to regularize the end-point singularities are introduced - quark transverse momenta and a gluon mass. The resulting cross sections show good agreement with experimental data, paving the way for a more comprehensive confrontation of theory and experiment at leading order and beyond. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_04092 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Twist-3 contribution to deeply virtual electroproduction of pions Passek-K., Kornelija High Energy Physics - Phenomenology High Energy Physics - Experiment We discuss deeply virtual meson production (DVMP), focusing on the role of higher-twist contributions in the description of deeply virtual pseudoscalar mesons at experimentally accessible energies. The standard collinear approach at the lowest twist does not adequately describe deeply virtual $π_0$ production. By incorporating twist-2 transversity generalized parton distributions (GPDs) and a twist-3 meson distribution amplitude, we have determined the twist-3 contribution, which includes both the 2-body ($q\bar{q}$) and 3-body ($q\bar{q}g$) meson Fock components. Two methods to regularize the end-point singularities are introduced - quark transverse momenta and a gluon mass. The resulting cross sections show good agreement with experimental data, paving the way for a more comprehensive confrontation of theory and experiment at leading order and beyond. |
| title | Twist-3 contribution to deeply virtual electroproduction of pions |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2411.04092 |