  The first phase of Beam Energy Scan (BES) program at the Relativistic
Heavy-Ion Collider (RHIC) was started in the year 2010 with the aim to study
the several aspects of the quantum chromodynamics (QCD) phase diagram. The
Solenoidal Tracker At RHIC (STAR) detector has taken data at $\sqrt{s_{NN}} = $
7.7, 11.5, 19.6, 27, and 39 GeV in Au+Au collisions in the years 2010 and 2011
as part of the BES programme. For these beam energies, we present the results
on the particle yields, average transverse mass and particle ratios for
identified particles in mid-rapidity ($|y|$ < 0.1). The measured particle
ratios have been used to study the chemical freeze-out dynamics within the
framework of a statistical model.
