Off-shell generalized parton distributions and form factors of the pion
Off-shell effects in generalized parton distributions (GPDs) of the pion, appearing, e.g., in the Sullivan process, are considered. Due to the lack of crossing symmetry, the moments of GPDs involve also odd powers of the skewness (longitudinal momentum transfer) parameter, which results in emergence...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S037026932300206X |
| _version_ | 1797843944258666496 |
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| author | Wojciech Broniowski Vanamali Shastry Enrique Ruiz Arriola |
| author_facet | Wojciech Broniowski Vanamali Shastry Enrique Ruiz Arriola |
| author_sort | Wojciech Broniowski |
| collection | DOAJ |
| description | Off-shell effects in generalized parton distributions (GPDs) of the pion, appearing, e.g., in the Sullivan process, are considered. Due to the lack of crossing symmetry, the moments of GPDs involve also odd powers of the skewness (longitudinal momentum transfer) parameter, which results in emergence of new off-shell form factors. With current-algebra techniques, we derive exact relations between the four off-shell gravitational form factors of the pion, in analogy to the electromagnetic case. Our results place stringent constraints on the off-shell GPDs of the pion. We provide an explicit realization in terms of a chiral quark model, where we show that the off-shell effects in GPDs are potentially significant in modeling physical processes and should not be neglected. |
| first_indexed | 2024-04-09T17:14:12Z |
| format | Article |
| id | doaj.art-cc33dd2eda9e4f87b84daea4a65259aa |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-09T17:14:12Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-cc33dd2eda9e4f87b84daea4a65259aa2023-04-20T04:35:36ZengElsevierPhysics Letters B0370-26932023-05-01840137872Off-shell generalized parton distributions and form factors of the pionWojciech Broniowski0Vanamali Shastry1Enrique Ruiz Arriola2H. Niewodniczański Institute of Nuclear Physics PAN, 31-342, Cracow, Poland; Institute of Physics, Jan Kochanowski University, 25-406, Kielce, Poland; Corresponding author.Institute of Physics, Jan Kochanowski University, 25-406, Kielce, PolandDepartamento de Física Atǿmica, Molecular y Nuclear and Instituto Carlos I de Física Teórica y Computacional, Universidad de Granada, E-18071, Granada, SpainOff-shell effects in generalized parton distributions (GPDs) of the pion, appearing, e.g., in the Sullivan process, are considered. Due to the lack of crossing symmetry, the moments of GPDs involve also odd powers of the skewness (longitudinal momentum transfer) parameter, which results in emergence of new off-shell form factors. With current-algebra techniques, we derive exact relations between the four off-shell gravitational form factors of the pion, in analogy to the electromagnetic case. Our results place stringent constraints on the off-shell GPDs of the pion. We provide an explicit realization in terms of a chiral quark model, where we show that the off-shell effects in GPDs are potentially significant in modeling physical processes and should not be neglected.http://www.sciencedirect.com/science/article/pii/S037026932300206XGeneralized parton distributionsOff-shell pionsSullivan process |
| spellingShingle | Wojciech Broniowski Vanamali Shastry Enrique Ruiz Arriola Off-shell generalized parton distributions and form factors of the pion Physics Letters B Generalized parton distributions Off-shell pions Sullivan process |
| title | Off-shell generalized parton distributions and form factors of the pion |
| title_full | Off-shell generalized parton distributions and form factors of the pion |
| title_fullStr | Off-shell generalized parton distributions and form factors of the pion |
| title_full_unstemmed | Off-shell generalized parton distributions and form factors of the pion |
| title_short | Off-shell generalized parton distributions and form factors of the pion |
| title_sort | off shell generalized parton distributions and form factors of the pion |
| topic | Generalized parton distributions Off-shell pions Sullivan process |
| url | http://www.sciencedirect.com/science/article/pii/S037026932300206X |
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