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The anisotropic galaxy 2-point correlation function (2PCF) allows measurementof the growth of large-scale structures from the effect of peculiar velocitieson the clustering pattern. We present new measurements of the auto- and cross-correlation function multipoles of 69,180 WiggleZ and 46,380 BOSS-CMASSgalaxies sharing an overlapping volume of ~0.2 (Gpc/h)^3. Analysing theredshift-space distortions (RSD) of galaxy 2-point statistics for these twogalaxy tracers, we test for systematic errors in the modelling depending ongalaxy type and investigate potential improvements in cosmological constraints.We build a large number of mock galaxy catalogues to examine the limits ofdifferent RSD models in terms of fitting scales and galaxy type, and to studythe covariance of the measurements when performing joint fits. For the galaxydata, fitting the monopole and quadrupole of the WiggleZ 2PCF on scales 24<s<80Mpc/h produces a measurement of the normalised growth rate$f\sigma_8$(z=0.54)=0.409$\pm$0.059, whereas for the CMASS galaxies we found aconsistent constraint of $f\sigma_8$(z=0.54)=0.466$\pm$0.074. When combiningthe measurements, accounting for the correlation between the two surveys, weobtain $f\sigma_8$(z=0.54)=0.413$\pm$0.054, in agreement with the LCDM-GR modelof structure growth and with other survey measurements.

The BOSS-WiggleZ overlap region II: dependence of cosmic growth on galaxy type