Regular Article - Theoretical Physics
One-loop effects in the main irreducible background to exclusive production at the LHC
Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, Russia
2 Department of Physics and Institute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE, UK
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Published online: 31 July 2008
We calculate the amplitude of production for the colour singlet, J z =0, di-gluon state at order. We consider the cancellation and a realistic cut-off, of the infrared divergent terms. We show that the one-loop radiative QCD contributions effectively reduce the Born level result for the central exclusive cross section at the LHC. This process is essentially the only irreducible QCD background to the exclusive signal.
© Springer-Verlag , 2008