Brane with variable tension as a possible solution to the problem of the
  late cosmic acceleration
  Braneworld models have been proposed as a possible solution to the problem of
the accelerated expansion of the Universe. The idea is to dispense the dark
energy (DE) and drive the late-time cosmic acceleration with a five-dimensional
geometry. Here, we investigate a brane model with variable brane tension as a
function of redshift called chrono-brane. We propose the polynomial
$\lambda=(1+z)^{n}$ function inspired in tracker-scalar-field potentials. To
constrain the $n$ exponent we use the latest observational Hubble data from
cosmic chronometers, Type Ia Supernovae from the full JLA sample, baryon
acoustic oscillations and the posterior distance from the cosmic microwave
background of Planck 2015 measurements. A joint analysis of these data
estimates $n\simeq6.19$ which generates a DE-like or cosmological-constant-like
term, in the Friedmann equation arising from the extra dimensions. This model
is consistent with these data and can drive the Universe to an accelerated
phase at late times.
