Hunting a light CP-violating Higgs boson via diffraction at the LHC
Department of Physics and Institute for Particle Physics Phenomenology, University of Durham, DH13LE, UK
2 Petersburg Nuclear Physics Institute, 188300, Gatchina, St.Petersburg, Russia
We study the central diffractive production of the (three neutral) Higgs bosons, with a rapidity gap on either side, in an MSSM scenario with CP-violation. We consider the and decay for the light H 1 boson and the four b-jet final state for the heavy H 2 and H 3 bosons, and discuss the corresponding backgrounds. A direct indication of the existence of CP-violation can come from the observation of either an azimuthal asymmetry in the angular distribution of the tagged forward protons (for the exclusive process) or of a contribution in the azimuthal correlation between the transverse energy flows in the proton fragmentation regions for the process with the diffractive dissociation of both incoming protons (). We emphasise the advantage of reactions with the rapidity gaps (that is, production by pomeron-pomeron fusion) to probe CP-parity and to determine the quantum numbers of the produced central object.
© Springer-Verlag, 2004