CT-PPS detectors adds precision proton tracking and timing detectors in the very forward region on both sides of CMS at about 200m from the IP to study central exclusive production (CEP) in proton-proton collisions.

The CT-PPS Technical Design Report can be found at here

CT-PPS aims at studying CEP events in the mass range 400 - 1200 GeV.

The mass reach is a function of the LHC optics: high b* runs have a higher reach, but a lower precision than low b*.