We have analysed very high-quality HARPS and UVES spectra of 95 solar analogs , 24 hosting planets and 71 without detected planets , to search for any possible signature of terrestial planets in the chemical abundances of volatile and refractory elements with respect to the solar abundances .

We demonstrate that stars with and without planets in this sample show similar mean abundance ratios , in particular , a sub-sample of 14 planet-host and 14 “ single ” solar analogs in the metallicity range 0.14 < { [ Fe / H ] } < 0.36 .
In addition , two of the planetary systems in this sub-sample , containing each of them a super-Earth-like planet with masses in the range \sim 7 - 11 Earth masses , have different volatile-to-refratory abundance ratios to what would be expected from the presence of a terrestial planets .

Finally , we check that after removing the Galactic chemical evolution effects any possible difference in mean abundances , with respect to solar values , of refratory and volatile elements practically dissappears .