Production of η and η mesons in pp and pPb collisions
The production of η and η mesons is studied in proton-proton and proton-lead collisions collected with the LHCb detector. Proton-proton collisions are studied at center-of-mass energies of 5.02 and 13 TeV and proton-lead collisions are studied at a center-of-mass energy per nucleon of 8.16 TeV. The...
| Autores: | , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/221837 |
| Acceso en línea: | https://hdl.handle.net/2445/221837 |
| Access Level: | acceso abierto |
| Palabra clave: | Col·lisions d'ions pesats Partícules (Matèria) Cromodinàmica quàntica Heavy ion collision Particles Quantum chromodynamics |
| Sumario: | The production of η and η mesons is studied in proton-proton and proton-lead collisions collected with the LHCb detector. Proton-proton collisions are studied at center-of-mass energies of 5.02 and 13 TeV and proton-lead collisions are studied at a center-of-mass energy per nucleon of 8.16 TeV. The studies are performed in center-of-mass (c.m.) rapidity regions 2.5 < yc.m. < 3.5 (forward rapidity) and −4.0 < yc.m. < −3.0 (backward rapidity) defined relative to the proton beam direction. The η and η production cross sections are measured differentially as a function of transverse momentum for 1.5 < pT < 10 GeV and 3 < pT < 10 GeV, respectively. The differential cross sections are used to calculate nuclear modification factors. The nuclear modification factors for η and η mesons agree at both forward and backward rapidity, showing no significant evidence of mass dependence. The differential cross sections of η mesons are also used to calculate η/π0 cross-section ratios, which show evidence of a deviation from the world average. These studies offer new constraints on mass-dependent nuclear effects in heavy-ion collisions, as well as η and η meson fragmentation. |
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