Can an invisible Higgs boson be seen via diffraction at the LHC?

Abstract

We study the possibility of observing an `invisible' Higgs boson in central exclusive diffractive production at the LHC. We evaluate the cross section using, as a simple example, the Standard Model with a heavy fourth generation, where the invisible decay mode $H \to ν_4 \barν_4$ dominates, with the heavy neutrino mass $M(ν_4) \simeq 50$ GeV. We discuss the possible requirements on trigger conditions and the background processes.

8 pages, 1 figure