  We study the $\Upsilon(1S)$ radiative decays to $\gamma \pi^+ \pi^-$ and
$\gamma K^+ K^-$ using data recorded with the BaBar detector operating at the
SLAC PEP-II asymmetric-energy $e^+e^-$ collider at center-of-mass energies at
the $\Upsilon(2S)$ and $\Upsilon(3S)$ resonances. The $\Upsilon(1S)$ resonance
is reconstructed from the decay $\Upsilon(nS)\to \pi^+ \pi^- \Upsilon(1S)$,
$n=2,3$. We also study the processes $\gamma \gamma \to \eta_c \to
\eta^{\prime}K^+K^-$, $\eta^{\prime}\pi^+\pi^-$, and $\eta \pi^+ \pi^-$ using a
data sample of 519 $fb^{-1}$ recorded with the BaBar detector at center-of-mass
energies at and near the $\Upsilon(nS)$ ($n = 2,3,4$) resonances. A Dalitz plot
analysis is performed of $\eta_c$ decays to $\eta^{\prime}K^+K^-$,
$\eta^{\prime}\pi^+\pi^-$, and $\eta \pi^+ \pi^-$. A new $a_0(1700)$ resonance
is observed in the $\eta \pi^{\pm}$ invariant-mass spectrum from the $\eta_c
\to \eta \pi^+ \pi^-$ decay. We compare $\eta_c$ decays to $\eta$ and
$\eta^{\prime}$ final states in association with scalar mesons as they relate
to the identification of the scalar glueball.
