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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., et al. Measurement of Υ production in pp collisions at √s = 5 TeV. Journal of High Energy Physics. 2023. Vol. 2023, num. 69, pags. 1-33. ISSN 1126-6708. [consulted: 23 of June of 2026]. Available at: https://hdl.handle.net/2445/220623