The first measurement of J/Ο and D0 production in PbNe collisions by
the LHCb experiment in its fixed-target configuration is reported. The
production of J/Ο and D0 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 sNNββ = 68.5 GeV. The J/Ο/D0 production cross-section ratio is studied as
a function of rapidity, transverse momentum and collision centrality. These
data are compared with measurements from pNe collisions at the same energy.
No anomalous J/Ο suppression that could indicate the formation of a
deconfined medium is observed.Comment: All 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