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

Published version
Peer-reviewed

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Authors

Aaij, R. 
Beteta, C. Abellán 
Adeva, B. 
Adinolfi, M. 
Aidala, C. A. 

Abstract

Abstract: The cross-sections of ψ(2S) 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(2S) mesons and those for ψ(2S) 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(2S) 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(2S) 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.

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Keywords

Regular Article - Experimental Physics

Journal Title

The European Physical Journal C

Conference Name

Journal ISSN

1434-6044
1434-6052

Volume Title

80

Publisher

Springer Berlin Heidelberg