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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/221837
Production of η and η mesons in pp and pPb collisions
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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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COMERMA MONTELLS, Albert, GARCIA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIOVENTÙ, Alessandra, GIRONELLA GIRONELL, Pere, GOMEZ FERNANDEZ, P., GRAUGÉS POUS, Eugeni, LOBO SALVIA, Aniol, LÓPEZ HUERTAS, Albert, MANERA ESCALERO, Rafel, MARIN BENITO, Carla, MAURICIO FERRE, Joan, ALFONSO ALBERO, Alejandro, VAZQUEZ GOMEZ, Ricardo, LHCb Collaboration. Production of η and η mesons in pp and pPb collisions. _Physical Review C_. 2024. Vol. 109, núm. 024907. [consulta: 14 de gener de 2026]. ISSN: 2469-9985. [Disponible a: https://hdl.handle.net/2445/221837]