Measurement of ψ(2 S) production cross-sections in proton-proton collisions at √s=7 and 13TeV

Research output: Contribution to journalArticlepeer-review

Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Nikhef National Institute for Subatomic Physics
  • Universität Zürich
  • Universidad de Santiago de Compostela
  • BRISTOL UNIVERSITY
  • University of Michigan, Ann Arbor.
  • Université Clermont Auvergne
  • University of Cincinnati
  • Laboratori Nazionali dell'Infn di Frascati
  • Technische Universität Dortmund
  • European Organization for Nuclear Research (CERN)
  • University of Glasgow
  • Universitat Autònoma de Barcelona
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • INFN Padova
  • IN2P3
  • Sezione INFN di Firenze
  • Sezione INFN di Ferrara
  • University of Maryland, College Park, Maryland 20742 USA
  • CNRS/IN2P3
  • Institute for High Energy Physics (IHEP)
  • Yandex School of Data Analysis
  • INFN Sezione di Cagliari
  • Ruprecht-Karls-Universität Heidelberg
  • THE UNIVERSITY OF WARWICK
  • Institute of Physics
  • Max-Planck-Institut für Kernphysik (MPIK)

Abstract

The cross-sections of ψ(2 S) meson production in proton-proton collisions at s=13TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of 275pb-1. The production cross-sections for prompt ψ(2 S) mesons and those for ψ(2 S) mesons from b-hadron decays (ψ(2S)-from-b) are determined as functions of the transverse momentum, pT, and the rapidity, y, of the ψ(2 S) meson in the kinematic range 2<pT<20GeV/c and 2.0 < y< 4.5. The production cross-sections integrated over this kinematic region are

σ(promptψ(2S),13TeV)=1.430±0.005(stat)±0.099(syst)μb,

σ(ψ(2S)-from-b,13TeV)=0.426±0.002(stat)±0.030(syst)μb.

A new measurement of ψ(2 S) production cross-sections in pp collisions at s=7TeV is also performed using data collected in 2011, corresponding to an integrated luminosity of 614pb-1. The integrated production cross-sections in the kinematic range 3.5<pT<14GeV/c and 2.0 < y< 4.5 are 

σ(promptψ(2S),7TeV)=0.471±0.001(stat)±0.025(syst)μb,

σ(ψ(2S)-from-b,7TeV)=0.126±0.001(stat)±0.008(syst)μb.

All results show reasonable agreement with theoretical calculations.

Details

Original languageEnglish
Article number185
JournalEuropean Physical Journal C
Volume80
Issue number3
Publication statusPublished - 28 Feb 2020