scale, $\sigma_8$, and the mean redshift $z_\mathrm{m}$ of the source galaxies. The results will be marginalized over a mean redshift range $0.78<z_\mathrm{m}<1.0$, corresponding to the $2\sigma$ interval of the redshift distribution found in Fu [et al. ]{}(2008). The neutrino physical density parameter relates to the total neutrino mass as ${\Omega_\nu}{h^2}={\sum m_\nu}/93$ eV, and we assume that the three neutrino masses are degenerate.

In a very conservative approach, we shall work in a Friedmann-Lemaître-Robertson-Walker (FLRW) cosmology with cosmological constant as dark energy, with energy density fixed assuming spatial flatness. More generally, in this framework, dark energy is a fluid-like component that is dominant at low redshift and responsible for the recent accelerated expansion. A quintessence field, eventually allowing for non-minimal couplings [@Wetterich1995; @uzan99; @TocchiniValentiniAmendola2002], provides the most general alternative that might alleviate the coincidence problem [e.g., @QuintessenceReview for a review]. Alternatively, it is possible to account for the global dynamics without advocating such an additional field, by considering back-reaction effects of structure formation [@DEbackreaction; @Kolb06; @Wiltshire07], rejecting the Copernican principle [@CopernicanPrinciple], or invoking theories of gravitation that differ from general relativity on large scales [see @DEclassification for a review]. Our results do not exclude these possibilities, which require new, consistent analyses 