ηc production at the Large Hadron Collider

We have studied the production of the S-1(0) charmonium state, eta(c), at the Large Hadron Collider (LHC) in the framework of non-relativistic quantum chromodynamics (NRQCD) using heavy-quark symmetry. We find that NRQCD predicts a large production cross-section for this resonance at the LHC even after taking into account the small branching ratio of eta(c) into two photons. We show that it will be possible to test NRQCD through its predictions for eta(c), with the statistics that will be achieved at the early stage of the LHC, running at a center of mass energy of 7 TeV with an integrated luminosity of 100 pb(-1).