Deformed Special Relativity with an Invariant Minimum Speed and its Cosmological Implications
Cl?udio Nassif
The paper aims to introduce a new symmetry principle in the space-time geometry through the
elimination of the classical idea of rest and by including a universal minimum limit of speed in the
subatomic world. Such a limit, unattainable by particles, represents a preferred reference frame
associated with a universal background field that breaks Lorentz symmetry. Thus the structure of
space-time is extended due to the presence of a vacuum energy density, which leads to a negative
pressure at cosmological scales. The tiny values of the cosmological constant and the vacuum energy
density shall be successfully obtained, being in good agreement with current observational results.
