Search for associated production of dark matter with a Higgs boson decaying to b b-bar or gamma-gamma at sqrt(s) = 13 TeV

Understand

A search for dark matter is performed using events with large missing transverse momentum and a Higgs boson decaying either to a pair of bottom quarks or to a pair of photons.

• The data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected in 2015 with the CMS detector at the LHC, correspond to an integrated luminosity of 2.3 inverse femtobarns.
• Results are interpreted in the context of a Z'-two-Higgs-doublet model, where the gauge symmetry of the standard model is extended to a U(1)[Z'] group, with a new massive Z' gauge boson, and the Higgs sector is extended with four additional Higgs bosons.
• In this model, a high-mass resonance Z' decays into a pseudoscalar boson A and a light SM-like Higgs boson, and the A decays to a pair of dark matter particles.