Renormalization group improved photon impact factors and the high energy virtual photon scattering
Abstract We perform the renormalization group improved collinear resummation of the photon-gluon impact factors. We construct the resummed cross section for virtual photon-photon (γ ∗ γ ∗) scattering which incorporates the impact factors and BFKL gluon Green’s function up to the next-to-leading loga...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-01-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP01(2024)106 |
| _version_ | 1827265043208601600 |
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| author | Dimitri Colferai Wanchen Li Anna M. Staśto |
| author_facet | Dimitri Colferai Wanchen Li Anna M. Staśto |
| author_sort | Dimitri Colferai |
| collection | DOAJ |
| description | Abstract We perform the renormalization group improved collinear resummation of the photon-gluon impact factors. We construct the resummed cross section for virtual photon-photon (γ ∗ γ ∗) scattering which incorporates the impact factors and BFKL gluon Green’s function up to the next-to-leading logarithmic accuracy in energy. The impact factors include important kinematical effects which are responsible for the most singular poles in Mellin space at next-to-leading order. Further conditions on the resummed cross section are obtained by requiring the consistency with the collinear limits. Our analysis is consistent with previous impact factor calculations at NLO, apart from a new term proportional to C F that we find for the longitudinal polarization. Finally, we use the resummed cross section to compare with the LEP data on the γ ∗ γ ∗ cross section and with previous calculations. The resummed result is lower than the leading logarithmic approximation but higher than the pure next-to-leading one, and is consistent with the experimental data. |
| first_indexed | 2024-03-08T12:41:17Z |
| format | Article |
| id | doaj.art-5c43d31d27e74919b4d81cd73a508f8c |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2025-03-22T03:55:40Z |
| publishDate | 2024-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-5c43d31d27e74919b4d81cd73a508f8c2024-04-28T11:06:15ZengSpringerOpenJournal of High Energy Physics1029-84792024-01-012024113710.1007/JHEP01(2024)106Renormalization group improved photon impact factors and the high energy virtual photon scatteringDimitri Colferai0Wanchen Li1Anna M. Staśto2Dipartimento di Fisica, Università di Firenze and INFN FirenzeDepartment of Physics, Penn State UniversityDepartment of Physics, Penn State UniversityAbstract We perform the renormalization group improved collinear resummation of the photon-gluon impact factors. We construct the resummed cross section for virtual photon-photon (γ ∗ γ ∗) scattering which incorporates the impact factors and BFKL gluon Green’s function up to the next-to-leading logarithmic accuracy in energy. The impact factors include important kinematical effects which are responsible for the most singular poles in Mellin space at next-to-leading order. Further conditions on the resummed cross section are obtained by requiring the consistency with the collinear limits. Our analysis is consistent with previous impact factor calculations at NLO, apart from a new term proportional to C F that we find for the longitudinal polarization. Finally, we use the resummed cross section to compare with the LEP data on the γ ∗ γ ∗ cross section and with previous calculations. The resummed result is lower than the leading logarithmic approximation but higher than the pure next-to-leading one, and is consistent with the experimental data.https://doi.org/10.1007/JHEP01(2024)106Deep Inelastic Scattering or Small-x PhysicsResummation |
| spellingShingle | Dimitri Colferai Wanchen Li Anna M. Staśto Renormalization group improved photon impact factors and the high energy virtual photon scattering Journal of High Energy Physics Deep Inelastic Scattering or Small-x Physics Resummation |
| title | Renormalization group improved photon impact factors and the high energy virtual photon scattering |
| title_full | Renormalization group improved photon impact factors and the high energy virtual photon scattering |
| title_fullStr | Renormalization group improved photon impact factors and the high energy virtual photon scattering |
| title_full_unstemmed | Renormalization group improved photon impact factors and the high energy virtual photon scattering |
| title_short | Renormalization group improved photon impact factors and the high energy virtual photon scattering |
| title_sort | renormalization group improved photon impact factors and the high energy virtual photon scattering |
| topic | Deep Inelastic Scattering or Small-x Physics Resummation |
| url | https://doi.org/10.1007/JHEP01(2024)106 |
| work_keys_str_mv | AT dimitricolferai renormalizationgroupimprovedphotonimpactfactorsandthehighenergyvirtualphotonscattering AT wanchenli renormalizationgroupimprovedphotonimpactfactorsandthehighenergyvirtualphotonscattering AT annamstasto renormalizationgroupimprovedphotonimpactfactorsandthehighenergyvirtualphotonscattering |