Constraining globular cluster formation through studies of young massive
  clusters - V. ALMA observations of clusters in the Antennae
  Some formation scenarios that have been put forward to explain multiple
populations within Globular Clusters (GCs) require that the young massive
cluster have large reservoirs of cold gas within them, which is necessary to
form future generations of stars. In this paper we use deep observations taken
with Atacama Large Millimeter/sub-millimeter Array (ALMA) to assess the amount
of molecular gas within 3 young (50-200 Myr) massive (~10^6 Msun) clusters in
the Antennae galaxies. No significant CO(3--2) emission was found associated
with any of the three clusters. We place upper limits for the molecular gas
within these clusters of ~1x10^5 Msun (or <9 % of the current stellar mass). We
briefly review different scenarios that propose multiple episodes of star
formation and discuss some of their assumptions and implications. Our results
are in tension with the predictions of GC formation scenarios that expect large
reservoirs of cool gas within young massive clusters at these ages.
