Testing the Rastall's theory using matter power spectrum
  The Rastall's theory is a modification of the General Relativity theory
leading to a different expression for the conservation law in the matter sector
compared with the usual one. It has been argued recently that such a theory may
have applications to the dark energy problem, since a pressureless fluid may
lead to an accelerated universe. In the present work we confront the Rastall's
theory with the power spectrum data. The results indicate a configuration that
essentially reduces the Rastall's theory to General Relativity, unless the
non-usual conservation law refers to a scalar field, situation where other
configurations are eventually possible.
