The very wide-field $gzK$ galaxy survey -- I. Details of the clustering
  properties of star-forming galaxies at $z \sim 2$
  We present the results of clustering analysis on the $z \sim 2$ star-forming
galaxies. By combining our data with data from publicly available archives, we
collect $g$-, $\zb / z$-, and $K$-band imaging data over 5.2 deg$^{2}$, which
represents the largest area BzK/gzK survey. We apply colour corrections to
translate our filter-set to those used in the original BzK selection for the
gzK selection. Because of the wide survey area, we obtain a sample of 41,112
star-forming gzK galaxies at $z \sim 2$ (sgzKs) down to $\KAB < 23.0$, and
determine high-quality two-point angular correlation functions (ACFs). Our ACFs
show an apparent excess from power-law behaviour at small angular scale
$(\theta \la 0.01^{\circ})$, which corresponds the virial radius of a dark halo
at $z \sim 2$ with a mass of $\sim 10^{13} \Msun$. We find that the correlation
lengths are consistent with the previous estimates over all magnitude range;
however, our results are evaluated with a smaller margin of error than that in
previous studies. The large amount of data enables us to determine ACFs
differentially depending on the luminosity of the subset of the data. The mean
halo mass of faint sgzKs $(22.0 < K \leq 23.0)$ was found to be $\Mh =
(1.32^{+0.09}_{-0.12}) \times 10^{12} h^{-1} \Msun$, whereas bright sgzKs
($18.0 \leq K \leq 21.0)$ were found to reside in dark haloes with a mass of
$\Mh = (3.26^{+1.23}_{-1.02}) \times 10^{13} h^{-1} \Msun$.
