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Measurement of ψ\psi(2SS) production cross-sections in proton-proton collisions at s\sqrt{s} = 7 and 13 TeV

Collaboration
Aug 8, 2019
23 pages
Published in:
  • Eur.Phys.J.C 80 (2020) 3, 185
  • Published: Feb 28, 2020
e-Print:
DOI:
Report number:
  • CERN-EP-2019-150,
  • LHCb-PAPER-2018-049
Experiments:
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Abstract: (Springer)
The cross-sections of ψ(2S)\psi(2S) meson production in proton-proton collisions at s=13 TeV\sqrt{s}=13~\mathrm{TeV} are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of 275 pb−1275~p\mathrm{b}^{-1}. The production cross-sections for prompt ψ(2S)\psi(2S) mesons and those for ψ(2S)\psi(2S) mesons from bb-hadron decays (ψ(2S)−from−b\psi{(2S)}\mathrm{-from-}b) are determined as functions of the transverse momentum, pTp_{\mathrm{T}}, and the rapidity, yy, of the ψ(2S)\psi(2S) meson in the kinematic range 2<pT<20 GeV/c2<p_{\mathrm{T}}<20~\mathrm{GeV}/c and 2.0<y<4.52.0<y<4.5. The production cross-sections integrated over this kinematic region are \begin{equation*} \begin{split} \sigma(\mbox{prompt }\psi(2S),13~\mathrm{TeV}) &= {1.430 \pm 0.005(\mathrm{stat}) \pm 0.099 (\mathrm{syst})\mu\mathrm{b}},\\ \sigma(\psi(2S)\mathrm{-from-}b,13~\mathrm{TeV})&={0.426 \pm 0.002(\mathrm{stat}) \pm0.030 (\mathrm{syst})\mu\mathrm{b}}. \end{split} \end{equation*} A new measurement of ψ(2S)\psi(2S) production cross-sections in pppp collisions at s=7 TeV\sqrt{s}=7~\mathrm{TeV} is also performed using data collected in 2011, corresponding to an integrated luminosity of 614 pb−1614~{p\mathrm{b}^{-1}}.The integrated production cross-sections in the kinematic range 3.5<pT<14 GeV/c3.5<p_{\mathrm{T}}<14~\mathrm{GeV}/c and 2.0<y<4.52.0<y<4.5 are \begin{equation*} \begin{split} \sigma(\mbox{prompt }\psi(2S),7~\mathrm{TeV}) &={0.471 \pm0.001 (\mathrm{stat}) \pm 0.025 (\mathrm{syst})\mu\mathrm{b}},\\ \sigma(\psi(2S)\mathrm{-from-}b,7~\mathrm{TeV}) &={0.126\pm0.001 (\mathrm{stat}) \pm0.008 (\mathrm{syst})\mu\mathrm{b}}. \end{split} \end{equation*} All results show reasonable agreement with theoretical calculations.
Note:
  • p p: scattering
  • p p: colliding beams
  • psi(3685): hadroproduction
  • kinematics
  • differential cross section: measured
  • transverse momentum dependence
  • rapidity dependence
  • channel cross section: measured
  • LHC-B
  • CERN LHC Coll
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