Abstract
We discuss the possibility of identifying invisible objects (e.g. dark matter) via missing mass in central exclusive processes; that is, in events where only forward protons are detected at the LHC. We show that the signal must have a cross section greater than 0.25 fb in order that it can be detected. We estimate the huge background caused by soft proton dissociation and evaluate the requirements of the detector ‘veto’ system needed to sufficiently suppress these events. In addition, we discuss the related process leading to the possible identification of the particles from the so-called ‘compressed-mass BSM’ scenarios. In this case the background is not so severe.
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