Proton internal pressure from deeply virtual Compton scattering on collider kinematics
Abstract The unique experimental connection to the QCD energy–momentum tensor offered by generalised parton distributions has been strongly highlighted in the past few years with attempts to extract the pressure and shear forces distributions within the nucleon. If, in principle, this can be perform...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13737-y |
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| author | H. Dutrieux T. Meisgny C. Mezrag H. Moutarde |
| author_facet | H. Dutrieux T. Meisgny C. Mezrag H. Moutarde |
| author_sort | H. Dutrieux |
| collection | DOAJ |
| description | Abstract The unique experimental connection to the QCD energy–momentum tensor offered by generalised parton distributions has been strongly highlighted in the past few years with attempts to extract the pressure and shear forces distributions within the nucleon. If, in principle, this can be performed in a model independent way from experimental data, in practice, the current limited precision and kinematic coverage make such an extraction very challenging. Moreover, the limitation to a leading-order description in the strong coupling of the data has provided only an indirect and weakly sensitive access to gluon degrees of freedom, solely through their mixing to quarks via evolution. In this paper we address this issue by providing a next-to-leading order formalism allowing a reanalysis of global fits with genuine gluonic degrees of freedom. In addition, we provide an estimate of the reduction in uncertainty that could stem from the extended kinematic range relevant for the future Electron Ion Collider. Finally, we stress the connection between the analysis of the dispersion relation in terms of generalised parton distributions and the deconvolution problem. |
| format | Article |
| id | doaj-art-5ab1591e059f4b36a74fd8eb788a07dc |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-5ab1591e059f4b36a74fd8eb788a07dc2025-02-02T12:38:31ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-01-0185112210.1140/epjc/s10052-024-13737-yProton internal pressure from deeply virtual Compton scattering on collider kinematicsH. Dutrieux0T. Meisgny1C. Mezrag2H. Moutarde3Physics Department, William & MaryIrfu, CEA, Université Paris-SaclayIrfu, CEA, Université Paris-SaclayIrfu, CEA, Université Paris-SaclayAbstract The unique experimental connection to the QCD energy–momentum tensor offered by generalised parton distributions has been strongly highlighted in the past few years with attempts to extract the pressure and shear forces distributions within the nucleon. If, in principle, this can be performed in a model independent way from experimental data, in practice, the current limited precision and kinematic coverage make such an extraction very challenging. Moreover, the limitation to a leading-order description in the strong coupling of the data has provided only an indirect and weakly sensitive access to gluon degrees of freedom, solely through their mixing to quarks via evolution. In this paper we address this issue by providing a next-to-leading order formalism allowing a reanalysis of global fits with genuine gluonic degrees of freedom. In addition, we provide an estimate of the reduction in uncertainty that could stem from the extended kinematic range relevant for the future Electron Ion Collider. Finally, we stress the connection between the analysis of the dispersion relation in terms of generalised parton distributions and the deconvolution problem.https://doi.org/10.1140/epjc/s10052-024-13737-y |
| spellingShingle | H. Dutrieux T. Meisgny C. Mezrag H. Moutarde Proton internal pressure from deeply virtual Compton scattering on collider kinematics European Physical Journal C: Particles and Fields |
| title | Proton internal pressure from deeply virtual Compton scattering on collider kinematics |
| title_full | Proton internal pressure from deeply virtual Compton scattering on collider kinematics |
| title_fullStr | Proton internal pressure from deeply virtual Compton scattering on collider kinematics |
| title_full_unstemmed | Proton internal pressure from deeply virtual Compton scattering on collider kinematics |
| title_short | Proton internal pressure from deeply virtual Compton scattering on collider kinematics |
| title_sort | proton internal pressure from deeply virtual compton scattering on collider kinematics |
| url | https://doi.org/10.1140/epjc/s10052-024-13737-y |
| work_keys_str_mv | AT hdutrieux protoninternalpressurefromdeeplyvirtualcomptonscatteringoncolliderkinematics AT tmeisgny protoninternalpressurefromdeeplyvirtualcomptonscatteringoncolliderkinematics AT cmezrag protoninternalpressurefromdeeplyvirtualcomptonscatteringoncolliderkinematics AT hmoutarde protoninternalpressurefromdeeplyvirtualcomptonscatteringoncolliderkinematics |