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

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doi:10.1140/epjc/s10052-020-7638-y

The cross-sections of.(2S) meson production in proton-proton collisions at v s = 13 TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of 275 pb-1. The production cross-sections for prompt.(2S) mesons and those for.(2S) mesons from b-hadron decays (.(2S)-from-b) are determined as functions of the transverse momentum, pT, and the rapidity, y, of the.(2S) meson in the kinematic range 2 < pT < 20 GeV/c and 2.0 < y < 4.5. The production cross-sections integrated over this kinematic region ares(prompt.(2S), 13 TeV) = 1.430 +/- 0.005 (stat) +/- 0.099 (syst) mu b,s(.(2S)-from-b, 13 TeV) = 0.426 +/- 0.002 (stat) +/- 0.030 (syst) mu b.A new measurement of.(2S) production cross-sections in pp collisions at v s = 7 TeV is also performed using data collected in 2011, corresponding to an integrated luminosity of 614 pb-1. The integrated production cross-sections in the kinematic range 3.5 < pT < 14 GeV/c and 2.0 < y < 4.5 ares(prompt.(2S), 7 TeV) = 0.471 +/- 0.001 (stat) +/- 0.025 (syst) mu b,s(.(2S)-from-b, 7 TeV) = 0.126 +/- 0.001 (stat) +/- 0.008 (syst) mu b.All results show reasonable agreement with theoretical calculations.

Aaij, R., Beteta, C.a., Adeva, B., Adinolfi, M., Aidala, C.a., Ajaltouni, Z., et al. (2020). Measurement of ψ(2 S) production cross-sections in proton-proton collisions at √s=7 and 13TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 80(3) [10.1140/epjc/s10052-020-7638-y].