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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/220623
Measurement of Υ production in pp collisions at √s = 5 TeV
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The production cross-sections of Υ mesons, namely Υ(1S), Υ(2S) and Υ(3S), in pp collisions at √ s = 5 TeV are measured with a data sample corresponding to an integrated luminosity of 9.13 ± 0.18 pb−1 collected by the LHCb detector. The Υ mesons are reconstructed in the decay mode Υ → µ +µ −. Double differential cross-sections times branching fractions, as functions of the transverse momentum pT and the rapidity y of the Υ mesons, are measured in the range pT < 20 GeV/c and 2.0 < y < 4.5. The results integrated over these pT and y ranges are σ(Υ(1S)) × B(Υ(1S) → µ +µ −) = 2101 ± 33 ± 83 pb, σ(Υ(2S)) × B(Υ(2S) → µ +µ −) = 526 ± 20 ± 21 pb, σ(Υ(3S)) × B(Υ(3S) → µ +µ −) = 242 ± 16 ± 10 pb, where the first uncertainties are statistical and the second are systematic. The ratios of cross-sections between measurements of two different Υ states and between measurements at different centre-of-mass energies are determined. The nuclear modification factor of Υ(1S) at √ s = 5 TeV is updated as well using the directly measured cross-section results from this analysis.
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AAIJ, R., ALFONSO ALBERO, Alejandro, GARCIA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIRONELLA GIRONELL, Pere, GOMEZ FERNANDEZ, S., GRAUGÉS POUS, Eugeni, LOBO SALVIA, Aniol, LÓPEZ HUERTAS, Albert, MANERA ESCALERO, Rafel, MARIN BENITO, Carla, MAURICIO, J., VAZQUEZ GOMEZ, Ricardo, LHCb collaboration. Measurement of Υ production in pp collisions at √s = 5 TeV. _Journal of High Energy Physics_. 2023. Vol. 2023, núm. 69, pàgs. 1-33. [consulta: 20 de gener de 2026]. ISSN: 1126-6708. [Disponible a: https://hdl.handle.net/2445/220623]