Measurement of χc1(3872) production in proton-proton collisions at √s = 8 and 13 TeV

LHCb collaboration, R.H. O'Neil

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The production cross-section of the χc1(3872) state relative to the ψ(2S) me-
son is measured using proton-proton collision data collected with the LHCb experiment
at centre-of-mass energies of √s = 8 and 13 TeV, corresponding to integrated luminosi-
ties of 2.0 and 5.4 fb−1, respectively. The two mesons are reconstructed in the J/ψπ+π−
final state. The ratios of the prompt and nonprompt χc1(3872) to ψ(2S) production cross-
sections are measured as a function of transverse momentum, pT, and rapidity, y, of the
χc1(3872) and ψ(2S) states, in the kinematic range 4 < pT < 20 GeV/c and 2.0 < y < 4.5.
The prompt ratio is found to increase with pT, independently of y. For the prompt compo-
nent, the double ratio of the χc1(3872) and ψ(2S) production cross-sections between 13 and
8 TeV is observed to be consistent with unity, independent of pT and centre-of-mass energy.
Original languageEnglish
Article number131
Pages (from-to)1-26
Number of pages26
Journal Journal of High Energy Physics
Issue number1
Publication statusPublished - 24 Jan 2022

Keywords / Materials (for Non-textual outputs)

  • Hadron-Hadron Scattering


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