  We study Higgs production and decay from TeV scale string balls in $pp$
collisions at $\sqrt{s}$ = 14 TeV at LHC. We present the results of total cross
section of diphotons, invariant mass distribution of the diphotons and $p_T$
distribution of the diphotons and $ZZ$ pairs from Higgs from string balls at
LHC. We find that the invariant mass distribution of diphotons from Higgs from
string balls is not very sensitive to the increase in diphoton invariant mass.
We find that for string mass scale $M_s$=2.5 TeV, which is the lower limit of
the string mass scale set by the recent CMS collaboration at LHC, the
$\frac{d\sigma}{dp_T}$ of high $p_T$ ($\ge$ 450 GeV) diphotons and $ZZ$ pairs
produced from Higgs from string balls is larger than that from standard model
Higgs. Hence in the absence of black hole production at LHC an enhancement of
high $p_T$ diphotons and $ZZ$ pairs at LHC can be useful signatures for string
theory at LHC. Since the matrix element for Higgs production in parton-parton
collisions via string regge excitations is not available we compute
$\frac{d\sigma}{dp_T}$ of photon production from string regge excitations and
make a comparison with that from string balls at LHC. We find that for string
mass scale $M_s$ = 2.5 TeV the $\frac{d\sigma_{photon}}{dp_T}$ from string
regge excitations is larger than that from string balls and black holes at LHC.
