Supersymmetric dark matter after LHC run 1Supersymmetric dark matter after LHC run 1
Faculty of Sciences. Physics
Elementary Particle Physics
European physical journal : C : particles and fields. - Berlin
75(2015):10, 16 p.
University of Antwerp
Different mechanisms operate in various regions of the MSSM parameter space to bring the relic density of the lightest neutralino, (chi) over bar (0)(1), assumed here to be the lightest SUSY particle (LSP) and thus the dark matter (DM) particle, into the range allowed by astrophysics and cosmology. These mechanisms include coannihilation with some nearly degenerate next-to-lightest supersymmetric particle such as the lighter stau t (tau) over bar (1), stop (t) over bar (1) or chargino (chi) over bar (+/-)(1), resonant annihilation via direct-channel heavy Higgs bosons H/A, the light Higgs boson h or the Z boson, and enhanced annihilation via a larger Higgsino component of the LSP in the focus-point region. These mechanisms typically select lower-dimensional subspaces inMSSMscenarios such as the CMSSM, NUHM1, NUHM2, and pMSSM10. We analyze how future LHC and direct DM searches can complement each other in the exploration of the different DM mechanisms within these scenarios. We find that the (tau) over bar (1) coannihilation regions of the CMSSM, NUHM1, NUHM2 can largely be explored at the LHC via searches for is not an element of(T) events and long-lived charged particles, whereas their H/A funnel, focus-point and (chi) over bar (+/-)(1) coannihilation regions can largely be explored by the LZ and Darwin DM direct detection experiments. We find that the dominant DM mechanism in our pMSSM10 analysis is (chi) over bar (+/-)(1) coannihilation: parts of its parameter space can be explored by the LHC, and a larger portion by future direct DM searches.