Anisotropic flow and the valence quark skeleton of hadrons
Abstract We study transverse momentum anisotropies, in particular, the elliptic flow v 2 due to the interference effect sourced by valence quarks in high-energy hadron-hadron collisions. Our main formula is derived as the high-energy (eikonal) limit of the impact-parameter dependent cross section in...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-08-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP08(2023)144 |
| _version_ | 1797647514382368768 |
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| author | Meijian Li Wenyang Qian Bin Wu Hong Zhang |
| author_facet | Meijian Li Wenyang Qian Bin Wu Hong Zhang |
| author_sort | Meijian Li |
| collection | DOAJ |
| description | Abstract We study transverse momentum anisotropies, in particular, the elliptic flow v 2 due to the interference effect sourced by valence quarks in high-energy hadron-hadron collisions. Our main formula is derived as the high-energy (eikonal) limit of the impact-parameter dependent cross section in quantum field theory, which agrees with that in terms of the impact parameter in the classical picture. As a quantitative assessment of the interference effect, we calculate v 2 in the azimuthal distribution of gluons at a comprehensive coverage of the impact parameter and the transverse momentum in high-energy pion-pion collisions. In a broad range of the impact parameter, a sizable amount of v 2, comparable with that produced due to saturated dense gluons or final-state interactions, is found to develop. This is in contrast with similar studies in heavy-ion collisions using classical color charge distributions in which such a contribution from geometric correlations was found to be small and has, hence, been ignored in recent studies. In our calculations, the valence sector of the pion wave function is obtained numerically from the Basis Light-Front Quantization, a non-perturbative light-front Hamiltonian approach. And our formalism is generic and can be applied to other small collision systems like proton-proton collisions. |
| first_indexed | 2024-03-11T15:17:19Z |
| format | Article |
| id | doaj.art-e27be07625f942c4a0ecac5ece356191 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-11T15:17:19Z |
| publishDate | 2023-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-e27be07625f942c4a0ecac5ece3561912023-10-29T12:10:38ZengSpringerOpenJournal of High Energy Physics1029-84792023-08-012023813610.1007/JHEP08(2023)144Anisotropic flow and the valence quark skeleton of hadronsMeijian Li0Wenyang Qian1Bin Wu2Hong Zhang3Instituto Galego de Física de Altas Enerxías IGFAE, Universidade de Santiago de CompostelaInstituto Galego de Física de Altas Enerxías IGFAE, Universidade de Santiago de CompostelaInstituto Galego de Física de Altas Enerxías IGFAE, Universidade de Santiago de CompostelaInstitute of Frontier and Interdisciplinary Science, Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong UniversityAbstract We study transverse momentum anisotropies, in particular, the elliptic flow v 2 due to the interference effect sourced by valence quarks in high-energy hadron-hadron collisions. Our main formula is derived as the high-energy (eikonal) limit of the impact-parameter dependent cross section in quantum field theory, which agrees with that in terms of the impact parameter in the classical picture. As a quantitative assessment of the interference effect, we calculate v 2 in the azimuthal distribution of gluons at a comprehensive coverage of the impact parameter and the transverse momentum in high-energy pion-pion collisions. In a broad range of the impact parameter, a sizable amount of v 2, comparable with that produced due to saturated dense gluons or final-state interactions, is found to develop. This is in contrast with similar studies in heavy-ion collisions using classical color charge distributions in which such a contribution from geometric correlations was found to be small and has, hence, been ignored in recent studies. In our calculations, the valence sector of the pion wave function is obtained numerically from the Basis Light-Front Quantization, a non-perturbative light-front Hamiltonian approach. And our formalism is generic and can be applied to other small collision systems like proton-proton collisions.https://doi.org/10.1007/JHEP08(2023)144Quark-Gluon PlasmaSpecific QCD Phenomenology |
| spellingShingle | Meijian Li Wenyang Qian Bin Wu Hong Zhang Anisotropic flow and the valence quark skeleton of hadrons Journal of High Energy Physics Quark-Gluon Plasma Specific QCD Phenomenology |
| title | Anisotropic flow and the valence quark skeleton of hadrons |
| title_full | Anisotropic flow and the valence quark skeleton of hadrons |
| title_fullStr | Anisotropic flow and the valence quark skeleton of hadrons |
| title_full_unstemmed | Anisotropic flow and the valence quark skeleton of hadrons |
| title_short | Anisotropic flow and the valence quark skeleton of hadrons |
| title_sort | anisotropic flow and the valence quark skeleton of hadrons |
| topic | Quark-Gluon Plasma Specific QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP08(2023)144 |
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