  If the scale invariance exists in nature, the so-called unparticle physics
may become part of reality. The only way to refute or confirm this idea is
through the experiments one of which is the Large Hadron Collider (LHC). One of
the peculiar properties of the unparticle stuff is that it gives striking
multi-photon signals which has been studied through only the unparticle
self-interactions. By considering not only the self-interactions of unparticles
but also all the other possible contributions, which are dominant, a detailed
study of the processes, within a scalar unparticle scenario, $pp\to 4\gamma$,
$pp\to 2\gamma 2g$, $pp\to 2\gamma 2\ell$, $pp\to 4e$, $pp\to 4\mu$ and $pp\to
2e2\mu$ at $\sqrt{s}=14$ TeV at the LHC is carried out. We use basic selection
cuts and analyze various distributions to discriminate the signals over the
Standard Model backgrounds and discuss what seems to be the most likely channel
among the above ones for an indirect manifestation of unparticle effects. We
follow a new approach to tackle the issue with the three-point correlation
function for the scalar unparticle self-interactions. We also obtain the
exclusion region in the unparticle parameter space from the available
two-photon data of the LHC.
