Twist-three cross-sections in deeply virtual Compton scattering
Abstract We study the deeply virtual Compton scattering process with both twist-two and twist-three Compton form factors and present our cross-sections formulas with all polarization configurations. While the twist-three contributions are generally assumed to be negligible in the literature due to t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-06-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP06(2022)096 |
| _version_ | 1797865766208405504 |
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| author | Yuxun Guo Xiangdong Ji Brandon Kriesten Kyle Shiells |
| author_facet | Yuxun Guo Xiangdong Ji Brandon Kriesten Kyle Shiells |
| author_sort | Yuxun Guo |
| collection | DOAJ |
| description | Abstract We study the deeply virtual Compton scattering process with both twist-two and twist-three Compton form factors and present our cross-sections formulas with all polarization configurations. While the twist-three contributions are generally assumed to be negligible in the literature due to the kinematical suppression, we compare them with the twist-two ones at typical JLab 6 GeV and 12 GeV kinematics as well as EIC kinematics and show their kinematical suppression explicitly, justifying the leading-twist approximation made in the literature. In addition, we also estimate the twist-three Compton form factors using Wandzura-Wilczek relations and inputs of twist-two generalized parton distributions based on a reggeized spectator model. With those estimated Compton form factors, we analyze the kinematical behavior of twist-two and twist-three cross-sections in a wide range of kinematics, and discuss the optimal regions for separating the leading-twist effects from the higher-twist ones. |
| first_indexed | 2024-04-09T23:14:31Z |
| format | Article |
| id | doaj.art-c7a640bc17094bad9c49bd89e32cc984 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-09T23:14:31Z |
| publishDate | 2022-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-c7a640bc17094bad9c49bd89e32cc9842023-03-22T10:13:02ZengSpringerOpenJournal of High Energy Physics1029-84792022-06-012022614810.1007/JHEP06(2022)096Twist-three cross-sections in deeply virtual Compton scatteringYuxun Guo0Xiangdong Ji1Brandon Kriesten2Kyle Shiells3Maryland Center for Fundamental Physics, Department of Physics, University of MarylandMaryland Center for Fundamental Physics, Department of Physics, University of MarylandCenter for Nuclear Femtography, SURACenter for Nuclear Femtography, SURAAbstract We study the deeply virtual Compton scattering process with both twist-two and twist-three Compton form factors and present our cross-sections formulas with all polarization configurations. While the twist-three contributions are generally assumed to be negligible in the literature due to the kinematical suppression, we compare them with the twist-two ones at typical JLab 6 GeV and 12 GeV kinematics as well as EIC kinematics and show their kinematical suppression explicitly, justifying the leading-twist approximation made in the literature. In addition, we also estimate the twist-three Compton form factors using Wandzura-Wilczek relations and inputs of twist-two generalized parton distributions based on a reggeized spectator model. With those estimated Compton form factors, we analyze the kinematical behavior of twist-two and twist-three cross-sections in a wide range of kinematics, and discuss the optimal regions for separating the leading-twist effects from the higher-twist ones.https://doi.org/10.1007/JHEP06(2022)096Parton DistributionsSpecific QCD PhenomenologyProperties of Hadrons |
| spellingShingle | Yuxun Guo Xiangdong Ji Brandon Kriesten Kyle Shiells Twist-three cross-sections in deeply virtual Compton scattering Journal of High Energy Physics Parton Distributions Specific QCD Phenomenology Properties of Hadrons |
| title | Twist-three cross-sections in deeply virtual Compton scattering |
| title_full | Twist-three cross-sections in deeply virtual Compton scattering |
| title_fullStr | Twist-three cross-sections in deeply virtual Compton scattering |
| title_full_unstemmed | Twist-three cross-sections in deeply virtual Compton scattering |
| title_short | Twist-three cross-sections in deeply virtual Compton scattering |
| title_sort | twist three cross sections in deeply virtual compton scattering |
| topic | Parton Distributions Specific QCD Phenomenology Properties of Hadrons |
| url | https://doi.org/10.1007/JHEP06(2022)096 |
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