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We present a photometric study of the globular clusters in the giantelliptical galaxy M60 in the Virgo cluster, based on deep, relatively widefield Washington CT_1 CCD images. The color-magnitude diagram reveals asignificant population of globular clusters in M60, and a large number of youngluminous clusters in NGC 4647, a small companion spiral galaxy north-west ofM60. The color distribution of the globular clusters in M60 is clearly bimodal,with a blue peak at (C-T_1)=1.37, and a red peak at (C-T_1)=1.87. We derive twonew transformation relations between the (C-T_1)_0 color and [Fe/H] using thedata for the globular clusters in our Galaxy and M49. Using these relations wederive the metallicity distribution of the globular clusters in M60, which isalso bimodal: a dominant metal-poor component with center at [Fe/H]=-1.2, and aweaker metal-rich component with center at [Fe/H]=-0.2. The radial numberdensity profile of the globular clusters is more extended than that of thestellar halo, and the radial number density profile of the blue globularclusters is more extended than that of the red globular clusters. The numberdensity maps of the globular clusters show that the spatial distribution of theblue globular clusters is roughly circular, while that of the red globularcluster is elongated similarly to that of the stellar halo. We estimate thetotal number of the globular clusters in M60 to be 3600+/-500$,and the specificfrequency to be S_N=3.8+/-0.4. The mean color of the bright blue globularclusters gets redder as they get brighter in both the inner and outer region ofM60. This blue tilt is seen also in the outer region of M49, the brightestVirgo galaxy. Implications of these results are discussed.

Washington CCD Photometry of the Globular Cluster System of the Giant Elliptical Galaxy M60 in Virgo