$J/\psi$ and $D^0$ production in $\sqrt{s_{\mathrm{NN}}}$ = 68.5 GeV PbNe collisions

Abstract

The first measurement of $J/\psi$ and $D^0$ production in PbNe collisions by the LHCb experiment in its fixed-target configuration is reported. The production of $J/\psi$ and $D^0$ mesons is studied with a beam of lead ions with an energy of 2.5 TeV per nucleon colliding on gaseous neon targets at rest, corresponding to a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{\mathrm{NN}}}$ = 68.5 GeV. The $J/\psi /D^0$ production cross-section ratio is studied as a function of rapidity, transverse momentum and collision centrality. These data are compared with measurements from $p$Ne collisions at the same energy and show no difference in the observed $J/\psi$ suppresion trend when comparing $p$Ne and PbNe peripheral collisions with PbNe central collisions.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-011.html (LHCb public pages). arXiv admin note: text overlap with arXiv:1810.07907

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