Dirac magnetic monopole production from photon fusion in proton collisions

We calculate the lowest-order cross-section for Dirac magnetic monopole production from photon fusion (gamma gamma) in p (p) over bar collisions at root s = 1.96 TeV, pp collisions at root s = 14 TeV, and we compare gamma gamma with Drell-Yan (DY) production. We find the total gamma gamma cross-section is comparable with DY at root s = 1.96 TeV and dominates DY by a factor > 50 at root s = 14 TeV. We conclude that both the gamma gamma and DY processes allow for a monopole mass limit m > 370 GeV based upon the null results of the recent monopole search at the Collider Detector at Fermilab (CDF). We also conclude that.. production is the leading mechanism to be considered for direct monopole searches at the Large Hadron Collider (LHC).