Resolved photometry of Young Massive Clusters in the starburst galaxy
  NGC 4214
  We present the results of deep high resolution imaging performed with
ACS/HRC@HST in the most active region of the nearby starburst galaxy NGC 4214.
We resolved the stellar populations of five Young Massive Clusters and their
surrounding galactic field. The star formation history of this region is
characterized by two main bursts occurred within the last 500 Myr, with the
oldest episode spread out across an area larger than that covered by the most
recent one. The ages derived for the analysed clusters cover a wide range
between 6.4<log(t/yr)<8.1 in agreement with those predicted by recent analyses
based on integrated photometry. The comparison between the mass of the young
associations and that of the surrounding field population with similar ages
indicates a high cluster formation efficiency (Gamma~33%) which decreases when
old populations are considered. The mass function of the major assembly has
been found to be slightly flatter than the Salpeter (1955) law with a hint of
mass segregation. We found no clear signatures of multiple stellar populations
in the two young (log(t/yr)<6.8) associations where we were able to resolve
their innermost region. The masses and sizes of three clusters indicate that at
least one of them could evolve toward a globular cluster-like structure.
