  We present a realistic non-supersymmetric inflation model based on a gauged
U(1)$_{B-L}$ symmetry and a tree-level Higgs potential. The inflaton is
identified with the scalar field which spontaneously breaks U(1)$_{B-L}$, and
we include radiative corrections \`a la Coleman-Weinberg in the inflaton
potential. If the scalar spectral index $n_s$ lies close to 0.96, as indicated
by the recent Planck and WMAP 9-yr measurements, the tensor-to-scalar ratio
$r$, a canonical measure for gravity waves, exceeds 0.01. Thus, according to
this model, gravity waves should be found in the near future. In this case, the
quantity $|dn_s/d \ln k|$ lies in the range $0.004-0.005$. Successful
baryogenesis can be realized in this class of models either via thermal or
non-thermal leptogenesis.
