Speaker
Description
The existence of Dark Matter is inferred from several astrophysical and
cosmological observations. Several extensions of the Standard Model
accommodating Dark Matter constraints predict associated production of Dark
Matter particles with the Standard Model Higgs boson. Such models are searched
for in final states with large missing transverse momentum and a Higgs boson
decaying to a pair of b-quarks with the ATLAS detector using 36.1 fb−1 of pp
collisions at a center-of-mass energy of 13 TeV at the LHC. An optimized
selection together with an improved Higgs boson identification in boosted
topologies leads to a significant improvement in sensitivity compared to
previous searches. The observed data are in good agreement with the Standard
Model predictions. Thus, limits are placed on the production cross-section of
Dark Matter particles with a Higgs boson for a simplified model with two Higgs
doublets and a heavy vector mediator. In addition, stringent model-independent
limits are placed on the production cross-section of non-SM events at detector
level which can be reinterpreted in the context of a wider range of theoretical
models for the production of this signature.
Speaker (not yet registered): Rainer Roehrig
| Experimental Collaboration | ATLAS |
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