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(Y(1S))×B(Y(1S)→μ+μ−)=2101±33±83 pb, σ(Y(2S))×B(Y(2S)→μ+μ−)=526±20±21 pb, σ(Y(3S))×B(Y(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.

Measurement of Υ production in pp collisions at √s = 5 TeV

Audurier, B.;Belin, S.;Brundu, D.;Bursche, A.;Cardini, A.;Dettori, F.;Dordei, F.;Fabiano, F.;Garau, M.;Lampis, A.;Lin, T.;Litvinov, R.;Manca, G.;Muzzetto, P.;Oldeman, R.;Saitta, B.;Sun, J.;
2023-01-01

Abstract

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(Y(1S))×B(Y(1S)→μ+μ−)=2101±33±83 pb, σ(Y(2S))×B(Y(2S)→μ+μ−)=526±20±21 pb, σ(Y(3S))×B(Y(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.
2023
Hadron-Hadron Scattering; Heavy Quark Production; QCD; Quarkonium
File in questo prodotto:
File Dimensione Formato  
JHEP07(2023)069.pdf

accesso aperto

Tipologia: versione editoriale (VoR)
Dimensione 878.19 kB
Formato Adobe PDF
878.19 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/369429
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 1
social impact