Search for dark matter in association with a Higgs boson decaying to b-quarks in pp collisions at s√=13 TeV with the ATLAS detector

H. WAHLBERG Y ATLAS COLLABORATION

PHYSICS LETTERS B

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016

0370-2693

A search for dark matter pair production in association with a Higgs boson decaying to a pairof bottom quarks is presented, using 3.2 f b −1 of pp collisions at a centre-of-mass energyof 13 TeV collected by the ATLAS detector at the LHC. The decay of the Higgs boson isreconstructed as a high-momentum bb̄ system with either a pair of small-radius jets, or asingle large-radius jet with substructure. The observed data are found to be consistent withthe expected backgrounds. Results are interpreted using a simplified model with a Z 0 gaugeboson mediating the interaction between dark matter and the Standard Model as well asa two-Higgs-doublet model containing an additional Z 0 boson which decays to a StandardModel Higgs boson and a new pseudoscalar Higgs boson, the latter decaying into a pair ofdark matter particles.